veux: Merge common tree to veux

- Ref:
  https://github.com/xiaomi-sm6375-devs/android_device_xiaomi_sm6375-common

Signed-off-by: kleidione <kleidione@gmail.com>

11 files changed, 5862 insertions, 0 deletions

diff --git a/gps/location/Android.bp b/gps/location/Android.bp
new file mode 100644
index 0000000..8532a08
--- /dev/null
+++ b/gps/location/Android.bp
@@ -0,0 +1,36 @@
+
+cc_library_shared {
+
+    name: "liblocation_api",
+    vendor: true,
+
+    sanitize: GNSS_SANITIZE,
+
+    shared_libs: [
+        "libutils",
+        "libcutils",
+        "libgps.utils",
+        "libdl",
+        "liblog",
+    ],
+
+    srcs: [
+        "LocationAPI.cpp",
+        "LocationAPIClientBase.cpp",
+    ],
+
+    cflags: ["-fno-short-enums"] + GNSS_CFLAGS,
+
+    header_libs: [
+        "libloc_pla_headers",
+        "libgps.utils_headers",
+    ],
+
+}
+
+cc_library_headers {
+
+    name: "liblocation_api_headers",
+    export_include_dirs: ["."],
+    vendor: true,
+}
diff --git a/gps/location/ILocationAPI.h b/gps/location/ILocationAPI.h
new file mode 100644
index 0000000..29846ac
--- /dev/null
+++ b/gps/location/ILocationAPI.h
@@ -0,0 +1,406 @@
+/* Copyright (c) 2018-2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef ILOCATIONAPI_H
+#define ILOCATIONAPI_H
+
+#include "LocationDataTypes.h"
+
+class ILocationAPI
+{
+public:
+    virtual ~ILocationAPI(){};
+
+    /** @brief Updates/changes the callbacks that will be called.
+        mandatory callbacks must be present for callbacks to be successfully updated
+        no return value */
+    virtual void updateCallbacks(LocationCallbacks&) = 0;
+
+    /* ================================== TRACKING ================================== */
+
+    /** @brief Starts a tracking session, which returns a session id that will be
+       used by the other tracking APIs and also in the responseCallback to match command
+       with response. locations are reported on the registered trackingCallback
+       periodically according to LocationOptions.
+       @return session id
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successfully started
+                LOCATION_ERROR_ALREADY_STARTED if a startTracking session is already in progress
+                LOCATION_ERROR_CALLBACK_MISSING if no trackingCallback was passed
+                LOCATION_ERROR_INVALID_PARAMETER if LocationOptions parameter is invalid */
+    virtual uint32_t startTracking(TrackingOptions&) = 0;
+
+    /** @brief Stops a tracking session associated with id parameter.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a tracking session */
+    virtual void stopTracking(uint32_t id) = 0;
+
+    /** @brief Changes the LocationOptions of a tracking session associated with id.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if LocationOptions parameters are invalid
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a tracking session */
+    virtual void updateTrackingOptions(uint32_t id, TrackingOptions&) = 0;
+
+    /* ================================== BATCHING ================================== */
+
+    /** @brief starts a batching session, which returns a session id that will be
+       used by the other batching APIs and also in the responseCallback to match command
+       with response. locations are reported on the batchingCallback passed in createInstance
+       periodically according to LocationOptions. A batching session starts tracking on
+       the low power processor and delivers them in batches by the batchingCallback when
+       the batch is full or when getBatchedLocations is called. This allows for the processor
+       that calls this API to sleep when the low power processor can batch locations in the
+       backgroup and wake up the processor calling the API only when the batch is full, thus
+       saving power.
+       @return session id
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_ALREADY_STARTED if a startBatching session is already in progress
+                LOCATION_ERROR_CALLBACK_MISSING if no batchingCallback
+                LOCATION_ERROR_INVALID_PARAMETER if a parameter is invalid
+                LOCATION_ERROR_NOT_SUPPORTED if batching is not supported */
+    virtual uint32_t startBatching(BatchingOptions&) = 0;
+
+    /** @brief Stops a batching session associated with id parameter.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with batching session */
+    virtual void stopBatching(uint32_t id) = 0;
+
+    /** @brief Changes the LocationOptions of a batching session associated with id.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if LocationOptions parameters are invalid
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a batching session */
+    virtual void updateBatchingOptions(uint32_t id, BatchingOptions&) = 0;
+
+    /** @brief Gets a number of locations that are currently stored/batched
+       on the low power processor, delivered by the batchingCallback passed in createInstance.
+       Location are then deleted from the batch stored on the low power processor.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful, will be followed by batchingCallback call
+                LOCATION_ERROR_CALLBACK_MISSING if no batchingCallback
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a batching session */
+    virtual void getBatchedLocations(uint32_t id, size_t count) = 0;
+
+    /* ================================== GEOFENCE ================================== */
+
+    /** @brief Adds any number of geofences and returns an array of geofence ids that
+       will be used by the other geofence APIs and also in the collectiveResponseCallback to
+       match command with response. The geofenceBreachCallback will deliver the status of each
+       geofence according to the GeofenceOption for each. The geofence id array returned will
+       be valid until the collectiveResponseCallback is called and has returned.
+       @return id array
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_CALLBACK_MISSING if no geofenceBreachCallback
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+                LOCATION_ERROR_NOT_SUPPORTED if geofence is not supported */
+    virtual uint32_t* addGeofences(size_t count, GeofenceOption*, GeofenceInfo*) = 0;
+
+    /** @brief Removes any number of geofences. Caller should delete ids array after
+       removeGeofences returneds.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session */
+    virtual void removeGeofences(size_t count, uint32_t* ids) = 0;
+
+    /** @brief Modifies any number of geofences. Caller should delete ids array after
+       modifyGeofences returns.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid */
+    virtual void modifyGeofences(size_t count, uint32_t* ids, GeofenceOption* options) = 0;
+
+    /** @brief Pauses any number of geofences, which is similar to removeGeofences,
+       only that they can be resumed at any time. Caller should delete ids array after
+       pauseGeofences returns.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session */
+    virtual void pauseGeofences(size_t count, uint32_t* ids) = 0;
+
+    /** @brief Resumes any number of geofences that are currently paused. Caller should
+       delete ids array after resumeGeofences returns.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session */
+    virtual void resumeGeofences(size_t count, uint32_t* ids) = 0;
+
+    /* ================================== GNSS ====================================== */
+
+     /** @brief gnssNiResponse is called in response to a gnssNiCallback.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters in GnssNiResponse are invalid
+                LOCATION_ERROR_ID_UNKNOWN if id does not match a gnssNiCallback */
+    virtual void gnssNiResponse(uint32_t id, GnssNiResponse response) = 0;
+};
+
+class ILocationControlAPI
+{
+public:
+    virtual ~ILocationControlAPI(){};
+
+    /** @brief Updates the gnss specific configuration, which returns a session id array
+       with an id for each of the bits set in GnssConfig.flags, order from low bits to high bits.
+       The response for each config that is set will be returned in collectiveResponseCallback.
+       The session id array returned will be valid until the collectiveResponseCallback is called
+       and has returned. This effect is global for all clients of ILocationAPI.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_INVALID_PARAMETER if any other parameters are invalid
+                LOCATION_ERROR_GENERAL_FAILURE if failure for any other reason */
+    virtual uint32_t* gnssUpdateConfig(const GnssConfig& config) = 0;
+
+    /** @brief Delete specific gnss aiding data for testing, which returns a session id
+       that will be returned in responseCallback to match command with response.
+       Only allowed in userdebug builds. This effect is global for all clients of ILocationAPI.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+                LOCATION_ERROR_NOT_SUPPORTED if build is not userdebug */
+    virtual uint32_t gnssDeleteAidingData(GnssAidingData& data) = 0;
+
+    /** @brief
+        Configure the constellation and SVs to be used by the GNSS engine on
+        modem.
+
+        @param
+        constellationEnablementConfig: configuration to enable/disable SV
+        constellation to be used by SPE engine. When size in
+        constellationEnablementConfig is set to 0, this indicates to reset SV
+        constellation configuration to modem NV default.
+
+        blacklistSvConfig: configuration to blacklist or unblacklist SVs
+        used by SPE engine
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configConstellations(
+            const GnssSvTypeConfig& constellationEnablementConfig,
+            const GnssSvIdConfig&   blacklistSvConfig) = 0;
+
+    /** @brief
+        Configure the secondary band of constellations to be used by
+        the GNSS engine on modem.
+
+        @param
+        secondaryBandConfig: configuration the secondary band usage
+        for SPE engine
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configConstellationSecondaryBand(
+            const GnssSvTypeConfig& secondaryBandConfig) = 0;
+
+    /** @brief
+        Enable or disable the constrained time uncertainty feature.
+
+        @param
+        enable: true to enable the constrained time uncertainty
+        feature and false to disable the constrainted time
+        uncertainty feature.
+
+        @param
+        tuncThreshold: this specifies the time uncertainty threshold
+        that gps engine need to maintain, in units of milli-seconds.
+        Default is 0.0 meaning that modem default value of time
+        uncertainty threshold will be used. This parameter is
+        ignored when requesting to disable this feature.
+
+        @param
+        energyBudget: this specifies the power budget that gps
+        engine is allowed to spend to maintain the time uncertainty.
+        Default is 0 meaning that GPS engine is not constained by
+        power budget and can spend as much power as needed. The
+        parameter need to be specified in units of 0.1 milli watt
+        second. This parameter is ignored requesting to disable this
+        feature.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters
+                are invalid
+    */
+    virtual uint32_t configConstrainedTimeUncertainty(
+            bool enable, float tuncThreshold = 0.0,
+            uint32_t energyBudget = 0) = 0;
+
+    /** @brief
+        Enable or disable position assisted clock estimator feature.
+
+        @param
+        enable: true to enable position assisted clock estimator and
+        false to disable the position assisted clock estimator
+        feature.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configPositionAssistedClockEstimator(bool enable) = 0;
+
+    /** @brief
+        Sets the lever arm parameters for the vehicle.
+
+        @param
+        configInfo: lever arm configuration info regarding below two
+        types of lever arm info:
+        a: GNSS Antenna w.r.t the origin at the IMU e.g.: inertial
+        measurement unit.
+        b: lever arm parameters regarding the OPF (output frame)
+        w.r.t the origin (at the GPS Antenna). Vehicle manufacturers
+        prefer the position output to be tied to a specific point in
+        the vehicle rather than where the antenna is placed
+        (midpoint of the rear axle is typical).
+
+        Caller can choose types of lever arm info to configure via the
+        leverMarkTypeMask.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configLeverArm(const LeverArmConfigInfo& configInfo) = 0;
+
+    /** @brief
+        Configure the robust location setting.
+
+        @param
+        enable: true to enable robust location and false to disable
+        robust location.
+
+        @param
+        enableForE911: true to enable robust location when device is on
+        E911 session and false to disable on E911 session.
+        This parameter is only valid if robust location is enabled.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configRobustLocation(bool enable, bool enableForE911) = 0;
+
+    /** @brief
+        Config the minimum GPS week used by modem GNSS engine.
+
+        @param
+        minGpsWeek: minimum GPS week to be used by modem GNSS engine.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configMinGpsWeek(uint16_t minGpsWeek) = 0;
+
+    /** @brief
+        Configure the vehicle body-to-Sensor mount parameters and
+        other parameters for dead reckoning position engine.
+
+        @param
+        dreConfig: vehicle body-to-Sensor mount angles and other
+        parameters.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configDeadReckoningEngineParams(const DeadReckoningEngineConfig& dreConfig)=0;
+
+    /** @brief
+        This API is used to instruct the specified engine to be in
+        the pause/resume state. <br/>
+
+        When the engine is placed in paused state, the engine will
+        stop. If there is an on-going session, engine will no longer
+        produce fixes. In the paused state, calling API to delete
+        aiding data from the paused engine may not have effect.
+        Request to delete Aiding data shall be issued after
+        engine resume. <br/>
+
+        Currently, only DRE engine will support pause/resume
+        request. responseCb() will return not supported when request
+        is made to pause/resume none-DRE engine. <br/>
+
+        Request to pause/resume DRE engine can be made with or
+        without an on-going session. With QDR engine, on resume,
+        GNSS position & heading re-acquisition is needed for DR
+        engine to engage. If DR engine is already in the requested
+        state, the request will be no-op.  <br/>
+
+        @param
+        engType: the engine that is instructed to change its run
+        state. <br/>
+
+        engState: the new engine run state that the engine is
+        instructed to be in. <br/>
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configEngineRunState(PositioningEngineMask engType,
+                                          LocEngineRunState engState) = 0;
+};
+
+#endif /* ILOCATIONAPI_H */
diff --git a/gps/location/LocationAPI.cpp b/gps/location/LocationAPI.cpp
new file mode 100644
index 0000000..3a50c46
--- /dev/null
+++ b/gps/location/LocationAPI.cpp
@@ -0,0 +1,976 @@
+/* Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#define LOG_NDEBUG 0
+#define LOG_TAG "LocSvc_LocationAPI"
+
+#include <location_interface.h>
+#include <dlfcn.h>
+#include <loc_pla.h>
+#include <log_util.h>
+#include <pthread.h>
+#include <map>
+#include <loc_misc_utils.h>
+
+typedef const GnssInterface* (getGnssInterface)();
+typedef const GeofenceInterface* (getGeofenceInterface)();
+typedef const BatchingInterface* (getBatchingInterface)();
+typedef void (createOSFramework)();
+typedef void (destroyOSFramework)();
+
+// GTP services
+typedef uint32_t (setOptInStatusGetter)(bool userConsent, responseCallback* callback);
+typedef void (enableProviderGetter)();
+typedef void (disableProviderGetter)();
+typedef void (getSingleNetworkLocationGetter)(trackingCallback* callback);
+typedef void (stopNetworkLocationGetter)(trackingCallback* callback);
+
+typedef struct {
+    // bit mask of the adpaters that we need to wait for the removeClientCompleteCallback
+    // before we invoke the registered locationApiDestroyCompleteCallback
+    LocationAdapterTypeMask waitAdapterMask;
+    locationApiDestroyCompleteCallback destroyCompleteCb;
+} LocationAPIDestroyCbData;
+
+// This is the map for the client that has requested destroy with
+// destroy callback provided.
+typedef std::map<LocationAPI*, LocationAPIDestroyCbData>
+    LocationClientDestroyCbMap;
+
+typedef std::map<LocationAPI*, LocationCallbacks> LocationClientMap;
+typedef struct {
+    LocationClientMap clientData;
+    LocationClientDestroyCbMap destroyClientData;
+    LocationControlAPI* controlAPI;
+    LocationControlCallbacks controlCallbacks;
+    GnssInterface* gnssInterface;
+    GeofenceInterface* geofenceInterface;
+    BatchingInterface* batchingInterface;
+} LocationAPIData;
+
+static LocationAPIData gData = {};
+static pthread_mutex_t gDataMutex = PTHREAD_MUTEX_INITIALIZER;
+static bool gGnssLoadFailed = false;
+static bool gBatchingLoadFailed = false;
+static bool gGeofenceLoadFailed = false;
+static uint32_t gOSFrameworkRefCount = 0;
+
+template <typename T1, typename T2>
+static const T1* loadLocationInterface(const char* library, const char* name) {
+    void* libhandle = nullptr;
+    T2* getter = (T2*)dlGetSymFromLib(libhandle, library, name);
+    if (nullptr == getter) {
+        return (const T1*) getter;
+    }else {
+        return (*getter)();
+    }
+}
+
+static void createOSFrameworkInstance() {
+    void* libHandle = nullptr;
+    createOSFramework* getter = (createOSFramework*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "createOSFramework");
+    if (getter != nullptr) {
+        (*getter)();
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+}
+
+static void destroyOSFrameworkInstance() {
+    void* libHandle = nullptr;
+    destroyOSFramework* getter = (destroyOSFramework*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "destroyOSFramework");
+    if (getter != nullptr) {
+        (*getter)();
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+}
+
+static bool needsGnssTrackingInfo(LocationCallbacks& locationCallbacks)
+{
+    return (locationCallbacks.gnssLocationInfoCb != nullptr ||
+            locationCallbacks.engineLocationsInfoCb != nullptr ||
+            locationCallbacks.gnssSvCb != nullptr ||
+            locationCallbacks.gnssNmeaCb != nullptr ||
+            locationCallbacks.gnssDataCb != nullptr ||
+            locationCallbacks.gnssMeasurementsCb != nullptr);
+}
+
+static bool isGnssClient(LocationCallbacks& locationCallbacks)
+{
+    return (locationCallbacks.gnssNiCb != nullptr ||
+            locationCallbacks.trackingCb != nullptr ||
+            locationCallbacks.gnssLocationInfoCb != nullptr ||
+            locationCallbacks.engineLocationsInfoCb != nullptr ||
+            locationCallbacks.gnssSvCb != nullptr ||
+            locationCallbacks.gnssNmeaCb != nullptr ||
+            locationCallbacks.gnssDataCb != nullptr ||
+            locationCallbacks.gnssMeasurementsCb != nullptr ||
+            locationCallbacks.locationSystemInfoCb != nullptr);
+}
+
+static bool isBatchingClient(LocationCallbacks& locationCallbacks)
+{
+    return (locationCallbacks.batchingCb != nullptr);
+}
+
+static bool isGeofenceClient(LocationCallbacks& locationCallbacks)
+{
+    return (locationCallbacks.geofenceBreachCb != nullptr ||
+            locationCallbacks.geofenceStatusCb != nullptr);
+}
+
+
+void LocationAPI::onRemoveClientCompleteCb (LocationAdapterTypeMask adapterType)
+{
+    bool invokeCallback = false;
+    locationApiDestroyCompleteCallback destroyCompleteCb;
+    LOC_LOGd("adatper type %x", adapterType);
+    pthread_mutex_lock(&gDataMutex);
+    auto it = gData.destroyClientData.find(this);
+    if (it != gData.destroyClientData.end()) {
+        it->second.waitAdapterMask &= ~adapterType;
+        if (it->second.waitAdapterMask == 0) {
+            invokeCallback = true;
+            destroyCompleteCb = it->second.destroyCompleteCb;
+            gData.destroyClientData.erase(it);
+        }
+    }
+    pthread_mutex_unlock(&gDataMutex);
+
+    if (invokeCallback) {
+        LOC_LOGd("invoke client destroy cb");
+        if (!destroyCompleteCb) {
+            (destroyCompleteCb) ();
+        }
+
+        delete this;
+    }
+}
+
+void onGnssRemoveClientCompleteCb (LocationAPI* client)
+{
+    client->onRemoveClientCompleteCb (LOCATION_ADAPTER_GNSS_TYPE_BIT);
+}
+
+void onBatchingRemoveClientCompleteCb (LocationAPI* client)
+{
+    client->onRemoveClientCompleteCb (LOCATION_ADAPTER_BATCHING_TYPE_BIT);
+}
+
+void onGeofenceRemoveClientCompleteCb (LocationAPI* client)
+{
+    client->onRemoveClientCompleteCb (LOCATION_ADAPTER_GEOFENCE_TYPE_BIT);
+}
+
+LocationAPI*
+LocationAPI::createInstance (LocationCallbacks& locationCallbacks)
+{
+    if (nullptr == locationCallbacks.capabilitiesCb ||
+        nullptr == locationCallbacks.responseCb ||
+        nullptr == locationCallbacks.collectiveResponseCb) {
+        LOC_LOGe("missing mandatory callback, return null");
+        return NULL;
+    }
+
+    LocationAPI* newLocationAPI = new LocationAPI();
+    bool requestedCapabilities = false;
+
+    pthread_mutex_lock(&gDataMutex);
+
+    gOSFrameworkRefCount++;
+    if (1 == gOSFrameworkRefCount) {
+        createOSFrameworkInstance();
+    }
+
+    if (isGnssClient(locationCallbacks)) {
+        if (NULL == gData.gnssInterface && !gGnssLoadFailed) {
+            gData.gnssInterface =
+                (GnssInterface*)loadLocationInterface<GnssInterface,
+                    getGnssInterface>("libgnss.so", "getGnssInterface");
+            if (NULL == gData.gnssInterface) {
+                gGnssLoadFailed = true;
+                LOC_LOGW("%s:%d]: No gnss interface available", __func__, __LINE__);
+            } else {
+                gData.gnssInterface->initialize();
+            }
+        }
+        if (NULL != gData.gnssInterface) {
+            gData.gnssInterface->addClient(newLocationAPI, locationCallbacks);
+            if (!requestedCapabilities) {
+                gData.gnssInterface->requestCapabilities(newLocationAPI);
+                requestedCapabilities = true;
+            }
+        }
+    }
+
+    if (isBatchingClient(locationCallbacks)) {
+        if (NULL == gData.batchingInterface && !gBatchingLoadFailed) {
+            gData.batchingInterface =
+                (BatchingInterface*)loadLocationInterface<BatchingInterface,
+                 getBatchingInterface>("libbatching.so", "getBatchingInterface");
+            if (NULL == gData.batchingInterface) {
+                gBatchingLoadFailed = true;
+                LOC_LOGW("%s:%d]: No batching interface available", __func__, __LINE__);
+            } else {
+                gData.batchingInterface->initialize();
+            }
+        }
+        if (NULL != gData.batchingInterface) {
+            gData.batchingInterface->addClient(newLocationAPI, locationCallbacks);
+            if (!requestedCapabilities) {
+                gData.batchingInterface->requestCapabilities(newLocationAPI);
+                requestedCapabilities = true;
+            }
+        }
+    }
+
+    if (isGeofenceClient(locationCallbacks)) {
+        if (NULL == gData.geofenceInterface && !gGeofenceLoadFailed) {
+            gData.geofenceInterface =
+               (GeofenceInterface*)loadLocationInterface<GeofenceInterface,
+               getGeofenceInterface>("libgeofencing.so", "getGeofenceInterface");
+            if (NULL == gData.geofenceInterface) {
+                gGeofenceLoadFailed = true;
+                LOC_LOGW("%s:%d]: No geofence interface available", __func__, __LINE__);
+            } else {
+                gData.geofenceInterface->initialize();
+            }
+        }
+        if (NULL != gData.geofenceInterface) {
+            gData.geofenceInterface->addClient(newLocationAPI, locationCallbacks);
+            if (!requestedCapabilities) {
+                gData.geofenceInterface->requestCapabilities(newLocationAPI);
+                requestedCapabilities = true;
+            }
+        }
+    }
+
+    gData.clientData[newLocationAPI] = locationCallbacks;
+
+    pthread_mutex_unlock(&gDataMutex);
+
+    return newLocationAPI;
+}
+
+void
+LocationAPI::destroy(locationApiDestroyCompleteCallback destroyCompleteCb)
+{
+    bool invokeDestroyCb = false;
+
+    pthread_mutex_lock(&gDataMutex);
+    auto it = gData.clientData.find(this);
+    if (it != gData.clientData.end()) {
+        bool removeFromGnssInf = (NULL != gData.gnssInterface);
+        bool removeFromBatchingInf = (NULL != gData.batchingInterface);
+        bool removeFromGeofenceInf = (NULL != gData.geofenceInterface);
+        bool needToWait = (removeFromGnssInf || removeFromBatchingInf || removeFromGeofenceInf);
+        LOC_LOGe("removeFromGnssInf: %d, removeFromBatchingInf: %d, removeFromGeofenceInf: %d,"
+                 "needToWait: %d", removeFromGnssInf, removeFromBatchingInf, removeFromGeofenceInf,
+                 needToWait);
+
+        if ((NULL != destroyCompleteCb) && (true == needToWait)) {
+            LocationAPIDestroyCbData destroyCbData = {};
+            destroyCbData.destroyCompleteCb = destroyCompleteCb;
+            // record down from which adapter we need to wait for the destroy complete callback
+            // only when we have received all the needed callbacks from all the associated stacks,
+            // we shall notify the client.
+            destroyCbData.waitAdapterMask =
+                    (removeFromGnssInf ? LOCATION_ADAPTER_GNSS_TYPE_BIT : 0);
+            destroyCbData.waitAdapterMask |=
+                    (removeFromBatchingInf ? LOCATION_ADAPTER_BATCHING_TYPE_BIT : 0);
+            destroyCbData.waitAdapterMask |=
+                    (removeFromGeofenceInf ? LOCATION_ADAPTER_GEOFENCE_TYPE_BIT : 0);
+            gData.destroyClientData[this] = destroyCbData;
+            LOC_LOGi("destroy data stored in the map: 0x%x", destroyCbData.waitAdapterMask);
+        }
+
+        if (removeFromGnssInf) {
+            gData.gnssInterface->removeClient(it->first,
+                                              onGnssRemoveClientCompleteCb);
+        }
+        if (removeFromBatchingInf) {
+            gData.batchingInterface->removeClient(it->first,
+                                             onBatchingRemoveClientCompleteCb);
+        }
+        if (removeFromGeofenceInf) {
+            gData.geofenceInterface->removeClient(it->first,
+                                                  onGeofenceRemoveClientCompleteCb);
+        }
+
+        gData.clientData.erase(it);
+
+        if (!needToWait) {
+            invokeDestroyCb = true;
+        }
+    } else {
+        LOC_LOGE("%s:%d]: Location API client %p not found in client data",
+                 __func__, __LINE__, this);
+    }
+
+    if (1 == gOSFrameworkRefCount) {
+        destroyOSFrameworkInstance();
+    }
+    gOSFrameworkRefCount--;
+
+    pthread_mutex_unlock(&gDataMutex);
+    if (invokeDestroyCb) {
+        if (!destroyCompleteCb) {
+            (destroyCompleteCb) ();
+        }
+        delete this;
+    }
+}
+
+LocationAPI::LocationAPI()
+{
+    LOC_LOGD("LOCATION API CONSTRUCTOR");
+}
+
+// private destructor
+LocationAPI::~LocationAPI()
+{
+    LOC_LOGD("LOCATION API DESTRUCTOR");
+}
+
+void
+LocationAPI::updateCallbacks(LocationCallbacks& locationCallbacks)
+{
+    if (nullptr == locationCallbacks.capabilitiesCb ||
+        nullptr == locationCallbacks.responseCb ||
+        nullptr == locationCallbacks.collectiveResponseCb) {
+        return;
+    }
+
+    pthread_mutex_lock(&gDataMutex);
+
+    if (isGnssClient(locationCallbacks)) {
+        if (NULL == gData.gnssInterface && !gGnssLoadFailed) {
+            gData.gnssInterface =
+                (GnssInterface*)loadLocationInterface<GnssInterface,
+                    getGnssInterface>("libgnss.so", "getGnssInterface");
+            if (NULL == gData.gnssInterface) {
+                gGnssLoadFailed = true;
+                LOC_LOGW("%s:%d]: No gnss interface available", __func__, __LINE__);
+            } else {
+                gData.gnssInterface->initialize();
+            }
+        }
+        if (NULL != gData.gnssInterface) {
+            // either adds new Client or updates existing Client
+            gData.gnssInterface->addClient(this, locationCallbacks);
+        }
+    }
+
+    if (isBatchingClient(locationCallbacks)) {
+        if (NULL == gData.batchingInterface && !gBatchingLoadFailed) {
+            gData.batchingInterface =
+                (BatchingInterface*)loadLocationInterface<BatchingInterface,
+                 getBatchingInterface>("libbatching.so", "getBatchingInterface");
+            if (NULL == gData.batchingInterface) {
+                gBatchingLoadFailed = true;
+                LOC_LOGW("%s:%d]: No batching interface available", __func__, __LINE__);
+            } else {
+                gData.batchingInterface->initialize();
+            }
+        }
+        if (NULL != gData.batchingInterface) {
+            // either adds new Client or updates existing Client
+            gData.batchingInterface->addClient(this, locationCallbacks);
+        }
+    }
+
+    if (isGeofenceClient(locationCallbacks)) {
+        if (NULL == gData.geofenceInterface && !gGeofenceLoadFailed) {
+            gData.geofenceInterface =
+                (GeofenceInterface*)loadLocationInterface<GeofenceInterface,
+                 getGeofenceInterface>("libgeofencing.so", "getGeofenceInterface");
+            if (NULL == gData.geofenceInterface) {
+                gGeofenceLoadFailed = true;
+                LOC_LOGW("%s:%d]: No geofence interface available", __func__, __LINE__);
+            } else {
+                gData.geofenceInterface->initialize();
+            }
+        }
+        if (NULL != gData.geofenceInterface) {
+            // either adds new Client or updates existing Client
+            gData.geofenceInterface->addClient(this, locationCallbacks);
+        }
+    }
+
+    gData.clientData[this] = locationCallbacks;
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+uint32_t
+LocationAPI::startTracking(TrackingOptions& trackingOptions)
+{
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    auto it = gData.clientData.find(this);
+    if (it != gData.clientData.end()) {
+        if (NULL != gData.gnssInterface) {
+            id = gData.gnssInterface->startTracking(this, trackingOptions);
+        } else {
+            LOC_LOGE("%s:%d]: No gnss interface available for Location API client %p ",
+                     __func__, __LINE__, this);
+        }
+    } else {
+        LOC_LOGE("%s:%d]: Location API client %p not found in client data",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+void
+LocationAPI::stopTracking(uint32_t id)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    auto it = gData.clientData.find(this);
+    if (it != gData.clientData.end()) {
+        if (gData.gnssInterface != NULL) {
+            gData.gnssInterface->stopTracking(this, id);
+        } else {
+            LOC_LOGE("%s:%d]: No gnss interface available for Location API client %p ",
+                     __func__, __LINE__, this);
+        }
+    } else {
+        LOC_LOGE("%s:%d]: Location API client %p not found in client data",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::updateTrackingOptions(
+        uint32_t id, TrackingOptions& trackingOptions)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    auto it = gData.clientData.find(this);
+    if (it != gData.clientData.end()) {
+        if (gData.gnssInterface != NULL) {
+            gData.gnssInterface->updateTrackingOptions(this, id, trackingOptions);
+        } else {
+            LOC_LOGE("%s:%d]: No gnss interface available for Location API client %p ",
+                     __func__, __LINE__, this);
+        }
+    } else {
+        LOC_LOGE("%s:%d]: Location API client %p not found in client data",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+uint32_t
+LocationAPI::startBatching(BatchingOptions &batchingOptions)
+{
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (NULL != gData.batchingInterface) {
+        id = gData.batchingInterface->startBatching(this, batchingOptions);
+    } else {
+        LOC_LOGE("%s:%d]: No batching interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+void
+LocationAPI::stopBatching(uint32_t id)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (NULL != gData.batchingInterface) {
+        gData.batchingInterface->stopBatching(this, id);
+    } else {
+        LOC_LOGE("%s:%d]: No batching interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::updateBatchingOptions(uint32_t id, BatchingOptions& batchOptions)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (NULL != gData.batchingInterface) {
+        gData.batchingInterface->updateBatchingOptions(this, id, batchOptions);
+    } else {
+        LOC_LOGE("%s:%d]: No batching interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::getBatchedLocations(uint32_t id, size_t count)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.batchingInterface != NULL) {
+        gData.batchingInterface->getBatchedLocations(this, id, count);
+    } else {
+        LOC_LOGE("%s:%d]: No batching interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+uint32_t*
+LocationAPI::addGeofences(size_t count, GeofenceOption* options, GeofenceInfo* info)
+{
+    uint32_t* ids = NULL;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.geofenceInterface != NULL) {
+        ids = gData.geofenceInterface->addGeofences(this, count, options, info);
+    } else {
+        LOC_LOGE("%s:%d]: No geofence interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return ids;
+}
+
+void
+LocationAPI::removeGeofences(size_t count, uint32_t* ids)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.geofenceInterface != NULL) {
+        gData.geofenceInterface->removeGeofences(this, count, ids);
+    } else {
+        LOC_LOGE("%s:%d]: No geofence interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::modifyGeofences(size_t count, uint32_t* ids, GeofenceOption* options)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.geofenceInterface != NULL) {
+        gData.geofenceInterface->modifyGeofences(this, count, ids, options);
+    } else {
+        LOC_LOGE("%s:%d]: No geofence interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::pauseGeofences(size_t count, uint32_t* ids)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.geofenceInterface != NULL) {
+        gData.geofenceInterface->pauseGeofences(this, count, ids);
+    } else {
+        LOC_LOGE("%s:%d]: No geofence interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::resumeGeofences(size_t count, uint32_t* ids)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.geofenceInterface != NULL) {
+        gData.geofenceInterface->resumeGeofences(this, count, ids);
+    } else {
+        LOC_LOGE("%s:%d]: No geofence interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void
+LocationAPI::gnssNiResponse(uint32_t id, GnssNiResponse response)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        gData.gnssInterface->gnssNiResponse(this, id, response);
+    } else {
+        LOC_LOGE("%s:%d]: No gnss interface available for Location API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+void LocationAPI::enableNetworkProvider() {
+    void* libHandle = nullptr;
+    enableProviderGetter* setter = (enableProviderGetter*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "enableNetworkProvider");
+    if (setter != nullptr) {
+        (*setter)();
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+}
+
+void LocationAPI::disableNetworkProvider() {
+    void* libHandle = nullptr;
+    disableProviderGetter* setter = (disableProviderGetter*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "disableNetworkProvider");
+    if (setter != nullptr) {
+        (*setter)();
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+}
+
+void LocationAPI::startNetworkLocation(trackingCallback* callback) {
+    void* libHandle = nullptr;
+    getSingleNetworkLocationGetter* setter =
+            (getSingleNetworkLocationGetter*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "startNetworkLocation");
+    if (setter != nullptr) {
+        (*setter)(callback);
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+}
+
+void LocationAPI::stopNetworkLocation(trackingCallback* callback) {
+    void* libHandle = nullptr;
+    stopNetworkLocationGetter* setter = (stopNetworkLocationGetter*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "stopNetworkLocation");
+    if (setter != nullptr) {
+        LOC_LOGe("called");
+        (*setter)(callback);
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+}
+
+LocationControlAPI*
+LocationControlAPI::createInstance(LocationControlCallbacks& locationControlCallbacks)
+{
+    LocationControlAPI* controlAPI = NULL;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (nullptr != locationControlCallbacks.responseCb && NULL == gData.controlAPI) {
+        if (NULL == gData.gnssInterface && !gGnssLoadFailed) {
+            gData.gnssInterface =
+                (GnssInterface*)loadLocationInterface<GnssInterface,
+                    getGnssInterface>("libgnss.so", "getGnssInterface");
+            if (NULL == gData.gnssInterface) {
+                gGnssLoadFailed = true;
+                LOC_LOGW("%s:%d]: No gnss interface available", __func__, __LINE__);
+            } else {
+                gData.gnssInterface->initialize();
+            }
+        }
+        if (NULL != gData.gnssInterface) {
+            gData.controlAPI = new LocationControlAPI();
+            gData.controlCallbacks = locationControlCallbacks;
+            gData.gnssInterface->setControlCallbacks(locationControlCallbacks);
+            controlAPI = gData.controlAPI;
+        }
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return controlAPI;
+}
+
+void
+LocationControlAPI::destroy()
+{
+    delete this;
+}
+
+LocationControlAPI::LocationControlAPI()
+{
+    LOC_LOGD("LOCATION CONTROL API CONSTRUCTOR");
+}
+
+LocationControlAPI::~LocationControlAPI()
+{
+    LOC_LOGD("LOCATION CONTROL API DESTRUCTOR");
+    pthread_mutex_lock(&gDataMutex);
+
+    gData.controlAPI = NULL;
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+uint32_t
+LocationControlAPI::enable(LocationTechnologyType techType)
+{
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->enable(techType);
+    } else {
+        LOC_LOGE("%s:%d]: No gnss interface available for Location Control API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+void
+LocationControlAPI::disable(uint32_t id)
+{
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        gData.gnssInterface->disable(id);
+    } else {
+        LOC_LOGE("%s:%d]: No gnss interface available for Location Control API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+}
+
+uint32_t*
+LocationControlAPI::gnssUpdateConfig(const GnssConfig& config)
+{
+    uint32_t* ids = NULL;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        ids = gData.gnssInterface->gnssUpdateConfig(config);
+    } else {
+        LOC_LOGE("%s:%d]: No gnss interface available for Location Control API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return ids;
+}
+
+uint32_t* LocationControlAPI::gnssGetConfig(GnssConfigFlagsMask mask) {
+
+    uint32_t* ids = NULL;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (NULL != gData.gnssInterface) {
+        ids = gData.gnssInterface->gnssGetConfig(mask);
+    } else {
+        LOC_LOGe("No gnss interface available for Control API client %p", this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return ids;
+}
+
+uint32_t
+LocationControlAPI::gnssDeleteAidingData(GnssAidingData& data)
+{
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->gnssDeleteAidingData(data);
+    } else {
+        LOC_LOGE("%s:%d]: No gnss interface available for Location Control API client %p ",
+                 __func__, __LINE__, this);
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configConstellations(
+        const GnssSvTypeConfig& constellationEnablementConfig,
+        const GnssSvIdConfig&   blacklistSvConfig) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->gnssUpdateSvConfig(
+                constellationEnablementConfig, blacklistSvConfig);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configConstellationSecondaryBand(
+        const GnssSvTypeConfig& secondaryBandConfig) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->gnssUpdateSecondaryBandConfig(secondaryBandConfig);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configConstrainedTimeUncertainty(
+            bool enable, float tuncThreshold, uint32_t energyBudget) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->setConstrainedTunc(enable,
+                                                     tuncThreshold,
+                                                     energyBudget);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configPositionAssistedClockEstimator(bool enable) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->setPositionAssistedClockEstimator(enable);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configLeverArm(const LeverArmConfigInfo& configInfo) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->configLeverArm(configInfo);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configRobustLocation(bool enable, bool enableForE911) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->configRobustLocation(enable, enableForE911);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configMinGpsWeek(uint16_t minGpsWeek) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->configMinGpsWeek(minGpsWeek);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configDeadReckoningEngineParams(
+        const DeadReckoningEngineConfig& dreConfig) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->configDeadReckoningEngineParams(dreConfig);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::configEngineRunState(
+        PositioningEngineMask engType, LocEngineRunState engState) {
+    uint32_t id = 0;
+    pthread_mutex_lock(&gDataMutex);
+
+    if (gData.gnssInterface != NULL) {
+        id = gData.gnssInterface->configEngineRunState(engType, engState);
+    } else {
+        LOC_LOGe("No gnss interface available for Location Control API");
+    }
+
+    pthread_mutex_unlock(&gDataMutex);
+    return id;
+}
+
+uint32_t LocationControlAPI::setOptInStatus(bool userConsent) {
+    void* libHandle = nullptr;
+    uint32_t sessionId = 0;
+    setOptInStatusGetter* setter = (setOptInStatusGetter*)dlGetSymFromLib(libHandle,
+            "liblocationservice_glue.so", "setOptInStatus");
+    if (setter != nullptr) {
+        sessionId = (*setter)(userConsent, &gData.controlCallbacks.responseCb);
+    } else {
+        LOC_LOGe("dlGetSymFromLib failed for liblocationservice_glue.so");
+    }
+    return sessionId;
+}
diff --git a/gps/location/LocationAPI.h b/gps/location/LocationAPI.h
new file mode 100644
index 0000000..7c70506
--- /dev/null
+++ b/gps/location/LocationAPI.h
@@ -0,0 +1,512 @@
+/* Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LOCATIONAPI_H
+#define LOCATIONAPI_H
+
+#include "ILocationAPI.h"
+
+class LocationAPI : public ILocationAPI
+{
+private:
+    LocationAPI();
+    ~LocationAPI();
+
+public:
+    /* creates an instance to LocationAPI object.
+       Will return NULL if mandatory parameters are invalid or if the maximum number
+       of instances have been reached */
+    static LocationAPI* createInstance(LocationCallbacks&);
+
+    /* destroy/cleans up the instance, which should be called when LocationControlAPI object is
+       no longer needed. LocationControlAPI* returned from createInstance will no longer valid
+       after destroy is called.
+       If the caller allocates the memory for LocationControlCallbacks used in
+       LocationControlAPI::createInstance, then the caller must ensure that the memory still remains
+       valid until destroyCompleteCb is invoked.
+    */
+    void destroy(locationApiDestroyCompleteCallback destroyCompleteCb=nullptr);
+
+    void onRemoveClientCompleteCb (LocationAdapterTypeMask adapterType);
+
+    /* updates/changes the callbacks that will be called.
+        mandatory callbacks must be present for callbacks to be successfully updated
+        no return value */
+    virtual void updateCallbacks(LocationCallbacks&) override;
+
+    /* ================================== TRACKING ================================== */
+
+    /* startTracking starts a tracking session, which returns a session id that will be
+       used by the other tracking APIs and also in the responseCallback to match command
+       with response. locations are reported on the trackingCallback passed in createInstance
+       periodically according to LocationOptions.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successfully started
+                LOCATION_ERROR_ALREADY_STARTED if a startTracking session is already in progress
+                LOCATION_ERROR_CALLBACK_MISSING if no trackingCallback was passed in createInstance
+                LOCATION_ERROR_INVALID_PARAMETER if TrackingOptions parameter is invalid */
+    virtual uint32_t startTracking(TrackingOptions&) override;
+
+    /* stopTracking stops a tracking session associated with id parameter.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a tracking session */
+    virtual void stopTracking(uint32_t id) override;
+
+    /* updateTrackingOptions changes the TrackingOptions of a tracking session associated with id
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if TrackingOptions parameters are invalid
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a tracking session */
+    virtual void updateTrackingOptions(uint32_t id, TrackingOptions&) override;
+
+    /* ================================== BATCHING ================================== */
+
+    /* startBatching starts a batching session, which returns a session id that will be
+       used by the other batching APIs and also in the responseCallback to match command
+       with response. locations are reported on the batchingCallback passed in createInstance
+       periodically according to LocationOptions. A batching session starts tracking on
+       the low power processor and delivers them in batches by the batchingCallback when
+       the batch is full or when getBatchedLocations is called. This allows for the processor
+       that calls this API to sleep when the low power processor can batch locations in the
+       backgroup and wake up the processor calling the API only when the batch is full, thus
+       saving power
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_ALREADY_STARTED if a startBatching session is already in progress
+                LOCATION_ERROR_CALLBACK_MISSING if no batchingCallback was passed in createInstance
+                LOCATION_ERROR_INVALID_PARAMETER if a parameter is invalid
+                LOCATION_ERROR_NOT_SUPPORTED if batching is not supported */
+    virtual uint32_t startBatching(BatchingOptions&) override;
+
+    /* stopBatching stops a batching session associated with id parameter.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with batching session */
+    virtual void stopBatching(uint32_t id) override;
+
+    /* updateBatchingOptions changes the BatchingOptions of a batching session associated with id
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if BatchingOptions parameters are invalid
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a batching session */
+    virtual void updateBatchingOptions(uint32_t id, BatchingOptions&) override;
+
+    /* getBatchedLocations gets a number of locations that are currently stored/batched
+       on the low power processor, delivered by the batchingCallback passed in createInstance.
+       Location are then deleted from the batch stored on the low power processor.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful, will be followed by batchingCallback call
+                LOCATION_ERROR_CALLBACK_MISSING if no batchingCallback was passed in createInstance
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a batching session */
+    virtual void getBatchedLocations(uint32_t id, size_t count) override;
+
+    /* ================================== GEOFENCE ================================== */
+
+    /* addGeofences adds any number of geofences and returns an array of geofence ids that
+       will be used by the other geofence APIs and also in the collectiveResponseCallback to
+       match command with response. The geofenceBreachCallback will deliver the status of each
+       geofence according to the GeofenceOption for each. The geofence id array returned will
+       be valid until the collectiveResponseCallback is called and has returned.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_CALLBACK_MISSING if no geofenceBreachCallback
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+                LOCATION_ERROR_NOT_SUPPORTED if geofence is not supported */
+    virtual uint32_t* addGeofences(size_t count, GeofenceOption*, GeofenceInfo*) override;
+
+    /* removeGeofences removes any number of geofences. Caller should delete ids array after
+       removeGeofences returneds.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session */
+    virtual void removeGeofences(size_t count, uint32_t* ids) override;
+
+    /* modifyGeofences modifies any number of geofences. Caller should delete ids array after
+       modifyGeofences returns.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid */
+    virtual void modifyGeofences(size_t count, uint32_t* ids, GeofenceOption* options) override;
+
+    /* pauseGeofences pauses any number of geofences, which is similar to removeGeofences,
+       only that they can be resumed at any time. Caller should delete ids array after
+       pauseGeofences returns.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session */
+    virtual void pauseGeofences(size_t count, uint32_t* ids) override;
+
+    /* resumeGeofences resumes any number of geofences that are currently paused. Caller should
+       delete ids array after resumeGeofences returns.
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id is not associated with a geofence session */
+    virtual void resumeGeofences(size_t count, uint32_t* ids) override;
+
+    /* ================================== GNSS ====================================== */
+
+     /* gnssNiResponse is called in response to a gnssNiCallback.
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters in GnssNiResponse are invalid
+                LOCATION_ERROR_ID_UNKNOWN if id does not match a gnssNiCallback */
+    virtual void gnssNiResponse(uint32_t id, GnssNiResponse response) override;
+
+    /* ================================== NETWORK PROVIDER =========================== */
+
+    /* enableNetworkProvider enables Network Provider */
+    virtual void enableNetworkProvider();
+
+    /* disableNetworkProvider disables Network Provider */
+    virtual void disableNetworkProvider();
+
+    /* startNetworkLocation start a single shot network location request */
+    virtual void startNetworkLocation(trackingCallback* callback);
+
+    /* stopNetworkLocation stop any ongoing network location request */
+    virtual void stopNetworkLocation(trackingCallback* callback);
+};
+
+typedef struct {
+    size_t size; // set to sizeof(LocationControlCallbacks)
+    responseCallback responseCb;                     // mandatory
+    collectiveResponseCallback collectiveResponseCb; // mandatory
+    gnssConfigCallback gnssConfigCb;                 // optional
+} LocationControlCallbacks;
+
+class LocationControlAPI : public ILocationControlAPI
+{
+private:
+    LocationControlAPI();
+    ~LocationControlAPI();
+
+public:
+    /* creates an instance to LocationControlAPI object.
+       Will return NULL if mandatory parameters are invalid or if the maximum number
+       of instances have been reached. Only once instance allowed */
+    static LocationControlAPI* createInstance(LocationControlCallbacks&);
+
+    /* destroy/cleans up the instance, which should be called when LocationControlAPI object is
+       no longer needed. LocationControlAPI* returned from createInstance will no longer valid
+       after destroy is called */
+    void destroy();
+
+    /* enable will enable specific location technology to be used for calculation locations and
+       will effectively start a control session if call is successful, which returns a session id
+       that will be returned in responseCallback to match command with response. The session id is
+       also needed to call the disable command.
+       This effect is global for all clients of LocationAPI
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ALREADY_STARTED if an enable was already called for this techType
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+                LOCATION_ERROR_GENERAL_FAILURE if failure for any other reason */
+    uint32_t enable(LocationTechnologyType techType);
+
+    /* disable will disable specific location technology to be used for calculation locations and
+       effectively ends the control session if call is successful.
+       id parameter is the session id that was returned in enable responseCallback for techType.
+       The session id is no longer valid after disable's responseCallback returns success.
+       This effect is global for all clients of LocationAPI
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_ID_UNKNOWN if id was not returned from responseCallback from enable
+                LOCATION_ERROR_GENERAL_FAILURE if failure for any other reason */
+    void disable(uint32_t id);
+
+    /* gnssUpdateConfig updates the gnss specific configuration, which returns a session id array
+       with an id for each of the bits set in GnssConfig.flags, order from low bits to high bits.
+       The response for each config that is set will be returned in collectiveResponseCallback.
+       The session id array returned will be valid until the collectiveResponseCallback is called
+       and has returned. This effect is global for all clients of LocationAPI
+        collectiveResponseCallback returns:
+                LOCATION_ERROR_SUCCESS if session was successful
+                LOCATION_ERROR_INVALID_PARAMETER if any other parameters are invalid
+                LOCATION_ERROR_GENERAL_FAILURE if failure for any other reason
+
+      PLEASE NOTE: It is caller's resposibility to FREE the memory of the return value.
+                   The memory must be freed by delete [].*/
+    virtual uint32_t* gnssUpdateConfig(const GnssConfig& config) override;
+
+    /* gnssGetConfig fetches the current constellation and SV configuration
+       on the GNSS engine.
+       Returns a session id array with an id for each of the bits set in
+       the mask parameter, order from low bits to high bits.
+       Response is sent via the registered gnssConfigCallback.
+       This effect is global for all clients of LocationAPI
+       collectiveResponseCallback returns:
+           LOCATION_ERROR_SUCCESS if session was successful
+           LOCATION_ERROR_INVALID_PARAMETER if any parameter is invalid
+           LOCATION_ERROR_CALLBACK_MISSING If no gnssConfigCallback
+                                           was passed in createInstance
+           LOCATION_ERROR_NOT_SUPPORTED If read of requested configuration
+                                        is not supported
+
+      PLEASE NOTE: It is caller's resposibility to FREE the memory of the return value.
+                   The memory must be freed by delete [].*/
+    uint32_t* gnssGetConfig(GnssConfigFlagsMask mask);
+
+    /* delete specific gnss aiding data for testing, which returns a session id
+       that will be returned in responseCallback to match command with response.
+       Only allowed in userdebug builds. This effect is global for all clients of LocationAPI
+        responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+                LOCATION_ERROR_NOT_SUPPORTED if build is not userdebug */
+    virtual uint32_t gnssDeleteAidingData(GnssAidingData& data) override;
+
+    /** @brief
+        Configure the constellation and SVs to be used by the GNSS engine on
+        modem.
+
+        @param
+        constellationEnablementConfig: configuration to enable/disable SV
+        constellation to be used by SPE engine. When size in
+        constellationEnablementConfig is set to 0, this indicates to reset SV
+        constellation configuration to modem NV default.
+
+        blacklistSvConfig: configuration to blacklist or unblacklist SVs
+        used by SPE engine
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configConstellations(
+            const GnssSvTypeConfig& constellationEnablementConfig,
+            const GnssSvIdConfig&   blacklistSvConfig) override;
+
+    /** @brief
+        Configure the secondary band of constellations to be used by
+        the GNSS engine on modem.
+
+        @param
+        secondaryBandConfig: configuration the secondary band usage
+        for SPE engine
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configConstellationSecondaryBand(
+            const GnssSvTypeConfig& secondaryBandConfig) override;
+
+    /** @brief
+        Enable or disable the constrained time uncertainty feature.
+
+        @param
+        enable: true to enable the constrained time uncertainty
+        feature and false to disable the constrainted time
+        uncertainty feature.
+
+        @param
+        tuncThreshold: this specifies the time uncertainty threshold
+        that gps engine need to maintain, in units of milli-seconds.
+        Default is 0.0 meaning that modem default value of time
+        uncertainty threshold will be used. This parameter is
+        ignored when requesting to disable this feature.
+
+        @param
+        energyBudget: this specifies the power budget that gps
+        engine is allowed to spend to maintain the time uncertainty.
+        Default is 0 meaning that GPS engine is not constained by
+        power budget and can spend as much power as needed. The
+        parameter need to be specified in units of 0.1 milli watt
+        second. This parameter is ignored requesting to disable this
+        feature.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters
+                are invalid
+    */
+    virtual uint32_t configConstrainedTimeUncertainty(
+            bool enable, float tuncThreshold = 0.0,
+            uint32_t energyBudget = 0) override;
+
+    /** @brief
+        Enable or disable position assisted clock estimator feature.
+
+        @param
+        enable: true to enable position assisted clock estimator and
+        false to disable the position assisted clock estimator
+        feature.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configPositionAssistedClockEstimator(bool enable) override;
+
+        /** @brief
+        Sets the lever arm parameters for the vehicle.
+
+        @param
+        configInfo: lever arm configuration info regarding below two
+        types of lever arm info:
+        a: GNSS Antenna w.r.t the origin at the IMU e.g.: inertial
+        measurement unit.
+        b: lever arm parameters regarding the OPF (output frame)
+        w.r.t the origin (at the GPS Antenna). Vehicle manufacturers
+        prefer the position output to be tied to a specific point in
+        the vehicle rather than where the antenna is placed
+        (midpoint of the rear axle is typical).
+
+        Caller can choose types of lever arm info to configure via the
+        leverMarkTypeMask.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configLeverArm(const LeverArmConfigInfo& configInfo) override;
+
+    /** @brief
+        Configure the robust location setting.
+
+        @param
+        enable: true to enable robust location and false to disable
+        robust location.
+
+        @param
+        enableForE911: true to enable robust location when device is
+        on E911 session and false to disable on E911 session.
+        This parameter is only valid if robust location is enabled.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configRobustLocation(bool enable, bool enableForE911) override;
+
+    /** @brief
+        Config the minimal GPS week used by modem GNSS engine.
+
+        @param
+        minGpsWeek: minimal GPS week to be used by modem GNSS engine.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configMinGpsWeek(uint16_t minGpsWeek) override;
+
+    /** @brief
+        Configure the vehicle body-to-Sensor mount parameters and
+        other parameters for dead reckoning position engine.
+
+        @param
+        dreConfig: vehicle body-to-Sensor mount angles and other
+        parameters.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configDeadReckoningEngineParams(
+            const DeadReckoningEngineConfig& dreConfig) override;
+
+        /** @brief
+        This API is used to instruct the specified engine to be in
+        the pause/resume state. <br/>
+
+        When the engine is placed in paused state, the engine will
+        stop. If there is an on-going session, engine will no longer
+        produce fixes. In the paused state, calling API to delete
+        aiding data from the paused engine may not have effect.
+        Request to delete Aiding data shall be issued after
+        engine resume. <br/>
+
+        Currently, only DRE engine will support pause/resume
+        request. responseCb() will return not supported when request
+        is made to pause/resume none-DRE engine. <br/>
+
+        Request to pause/resume DRE engine can be made with or
+        without an on-going session. With QDR engine, on resume, GNSS
+        position & heading re-acquisition is needed for DR engine to
+        engage. If DR engine is already in the requested state, the
+        request will be no-op.  <br/>
+
+        @param
+        engType: the engine that is instructed to change its run
+        state. <br/>
+
+        engState: the new engine run state that the engine is
+        instructed to be in. <br/>
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response. This effect is global for all
+        clients of LocationAPI responseCallback returns:
+                LOCATION_ERROR_SUCCESS if successful
+                LOCATION_ERROR_INVALID_PARAMETER if any parameters are invalid
+    */
+    virtual uint32_t configEngineRunState(PositioningEngineMask engType,
+                                          LocEngineRunState engState) override;
+
+      /** @brief
+        Set the EULA opt-in status from system user. This is used as consent to
+        use network-based positioning.
+
+        @param
+        userConsnt: user agrees to use GTP service or not.
+
+        @return
+        A session id that will be returned in responseCallback to
+        match command with response.
+    */
+    virtual uint32_t setOptInStatus(bool userConsent);
+};
+
+#endif /* LOCATIONAPI_H */
diff --git a/gps/location/LocationAPIClientBase.cpp b/gps/location/LocationAPIClientBase.cpp
new file mode 100644
index 0000000..4865a16
--- /dev/null
+++ b/gps/location/LocationAPIClientBase.cpp
@@ -0,0 +1,977 @@
+/* Copyright (c) 2017, 2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#define LOG_NDEBUG 0
+#define LOG_TAG "LocSvc_APIClientBase"
+
+#include <loc_pla.h>
+#include <log_util.h>
+#include <inttypes.h>
+#include <loc_cfg.h>
+#include "LocationAPIClientBase.h"
+
+#define GEOFENCE_SESSION_ID 0xFFFFFFFF
+#define CONFIG_SESSION_ID 0xFFFFFFFF
+
+// LocationAPIControlClient
+LocationAPIControlClient::LocationAPIControlClient() :
+    mEnabled(false)
+{
+    pthread_mutex_init(&mMutex, nullptr);
+
+    for (int i = 0; i < CTRL_REQUEST_MAX; i++) {
+        mRequestQueues[i].reset((uint32_t)0);
+    }
+
+    memset(&mConfig, 0, sizeof(GnssConfig));
+
+    LocationControlCallbacks locationControlCallbacks;
+    locationControlCallbacks.size = sizeof(LocationControlCallbacks);
+
+    locationControlCallbacks.responseCb =
+        [this](LocationError error, uint32_t id) {
+            onCtrlResponseCb(error, id);
+        };
+    locationControlCallbacks.collectiveResponseCb =
+        [this](size_t count, LocationError* errors, uint32_t* ids) {
+            onCtrlCollectiveResponseCb(count, errors, ids);
+        };
+
+    mLocationControlAPI = LocationControlAPI::createInstance(locationControlCallbacks);
+}
+
+LocationAPIControlClient::~LocationAPIControlClient()
+{
+    pthread_mutex_lock(&mMutex);
+
+    if (mLocationControlAPI) {
+        mLocationControlAPI->destroy();
+        mLocationControlAPI = nullptr;
+    }
+
+    for (int i = 0; i < CTRL_REQUEST_MAX; i++) {
+        mRequestQueues[i].reset((uint32_t)0);
+    }
+
+    pthread_mutex_unlock(&mMutex);
+
+    pthread_mutex_destroy(&mMutex);
+}
+
+uint32_t LocationAPIControlClient::locAPIGnssDeleteAidingData(GnssAidingData& data)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationControlAPI) {
+        uint32_t session = mLocationControlAPI->gnssDeleteAidingData(data);
+        LOC_LOGI("%s:%d] start new session: %d", __FUNCTION__, __LINE__, session);
+        mRequestQueues[CTRL_REQUEST_DELETEAIDINGDATA].reset(session);
+        mRequestQueues[CTRL_REQUEST_DELETEAIDINGDATA].push(new GnssDeleteAidingDataRequest(*this));
+
+        retVal = LOCATION_ERROR_SUCCESS;
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    return retVal;
+}
+
+uint32_t LocationAPIControlClient::locAPIEnable(LocationTechnologyType techType)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mEnabled) {
+        // just return success if already enabled
+        retVal = LOCATION_ERROR_SUCCESS;
+    } else if (mLocationControlAPI) {
+        uint32_t session = mLocationControlAPI->enable(techType);
+        LOC_LOGI("%s:%d] start new session: %d", __FUNCTION__, __LINE__, session);
+        mRequestQueues[CTRL_REQUEST_CONTROL].reset(session);
+        mRequestQueues[CTRL_REQUEST_CONTROL].push(new EnableRequest(*this));
+        retVal = LOCATION_ERROR_SUCCESS;
+        mEnabled = true;
+    } else {
+        LOC_LOGE("%s:%d] failed.", __FUNCTION__, __LINE__);
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    return retVal;
+}
+
+void LocationAPIControlClient::locAPIDisable()
+{
+    pthread_mutex_lock(&mMutex);
+    if (mEnabled && mLocationControlAPI) {
+        uint32_t session = 0;
+        session = mRequestQueues[CTRL_REQUEST_CONTROL].getSession();
+        if (session > 0) {
+            mRequestQueues[CTRL_REQUEST_CONTROL].push(new DisableRequest(*this));
+            mLocationControlAPI->disable(session);
+            mEnabled = false;
+        } else {
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__, session);
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+uint32_t LocationAPIControlClient::locAPIGnssUpdateConfig(GnssConfig config)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+
+    pthread_mutex_lock(&mMutex);
+    if (mLocationControlAPI) {
+        if (mConfig.equals(config)) {
+            LOC_LOGv("GnssConfig is identical to previous call");
+            retVal = LOCATION_ERROR_SUCCESS;
+        } else {
+            mConfig = config;
+            uint32_t* idArray = mLocationControlAPI->gnssUpdateConfig(config);
+            LOC_LOGv("gnssUpdateConfig return array: %p", idArray);
+            if (nullptr != idArray) {
+                if (nullptr != mRequestQueues[CTRL_REQUEST_CONFIG_UPDATE].getSessionArrayPtr()) {
+                    mRequestQueues[CTRL_REQUEST_CONFIG_UPDATE].reset(idArray);
+                }
+                mRequestQueues[CTRL_REQUEST_CONFIG_UPDATE].push(new GnssUpdateConfigRequest(*this));
+                retVal = LOCATION_ERROR_SUCCESS;
+                delete [] idArray;
+            }
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+    return retVal;
+}
+
+uint32_t LocationAPIControlClient::locAPIGnssGetConfig(GnssConfigFlagsMask mask)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+
+    pthread_mutex_lock(&mMutex);
+    if (mLocationControlAPI) {
+
+        uint32_t* idArray = mLocationControlAPI->gnssGetConfig(mask);
+        LOC_LOGv("gnssGetConfig return array: %p", idArray);
+        if (nullptr != idArray) {
+            if (nullptr != mRequestQueues[CTRL_REQUEST_CONFIG_GET].getSessionArrayPtr()) {
+                mRequestQueues[CTRL_REQUEST_CONFIG_GET].reset(idArray);
+            }
+            mRequestQueues[CTRL_REQUEST_CONFIG_GET].push(new GnssGetConfigRequest(*this));
+            retVal = LOCATION_ERROR_SUCCESS;
+            delete [] idArray;
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+    return retVal;
+}
+
+void LocationAPIControlClient::onCtrlResponseCb(LocationError error, uint32_t id)
+{
+    if (error != LOCATION_ERROR_SUCCESS) {
+        LOC_LOGE("%s:%d] ERROR: %d ID: %d", __FUNCTION__, __LINE__, error, id);
+    } else {
+        LOC_LOGV("%s:%d] SUCCESS: %d id: %d", __FUNCTION__, __LINE__, error, id);
+    }
+    LocationAPIRequest* request = getRequestBySession(id);
+    if (request) {
+        request->onResponse(error, id);
+        delete request;
+    }
+}
+
+void LocationAPIControlClient::onCtrlCollectiveResponseCb(
+        size_t count, LocationError* errors, uint32_t* ids)
+{
+    for (size_t i = 0; i < count; i++) {
+        if (errors[i] != LOCATION_ERROR_SUCCESS) {
+            LOC_LOGE("%s:%d] ERROR: %d ID: %d", __FUNCTION__, __LINE__, errors[i], ids[i]);
+        } else {
+            LOC_LOGV("%s:%d] SUCCESS: %d id: %d", __FUNCTION__, __LINE__, errors[i], ids[i]);
+        }
+    }
+    LocationAPIRequest* request = getRequestBySessionArrayPtr(ids);
+    if (request) {
+        request->onCollectiveResponse(count, errors, ids);
+        delete request;
+    }
+}
+
+LocationAPIRequest* LocationAPIControlClient::getRequestBySession(uint32_t session)
+{
+    pthread_mutex_lock(&mMutex);
+    LocationAPIRequest* request = nullptr;
+
+    if (mRequestQueues[CTRL_REQUEST_DELETEAIDINGDATA].getSession() == session) {
+        request = mRequestQueues[CTRL_REQUEST_DELETEAIDINGDATA].pop();
+    } else if (mRequestQueues[CTRL_REQUEST_CONTROL].getSession() == session) {
+        request = mRequestQueues[CTRL_REQUEST_CONTROL].pop();
+    }
+
+    pthread_mutex_unlock(&mMutex);
+    return request;
+}
+
+LocationAPIRequest*
+LocationAPIControlClient::getRequestBySessionArrayPtr(
+        uint32_t* sessionArrayPtr)
+{
+    pthread_mutex_lock(&mMutex);
+    LocationAPIRequest* request = nullptr;
+
+    if (mRequestQueues[CTRL_REQUEST_CONFIG_UPDATE].getSessionArrayPtr() == sessionArrayPtr) {
+        request = mRequestQueues[CTRL_REQUEST_CONFIG_UPDATE].pop();
+    } else if (mRequestQueues[CTRL_REQUEST_CONFIG_GET].getSessionArrayPtr() == sessionArrayPtr) {
+        request = mRequestQueues[CTRL_REQUEST_CONFIG_GET].pop();
+    }
+
+    pthread_mutex_unlock(&mMutex);
+    return request;
+}
+
+// LocationAPIClientBase
+LocationAPIClientBase::LocationAPIClientBase() :
+    mGeofenceBreachCallback(nullptr),
+    mBatchingStatusCallback(nullptr),
+    mLocationAPI(nullptr),
+    mBatchSize(-1),
+    mTracking(false)
+{
+
+    // use recursive mutex, in case callback come from the same thread
+    pthread_mutexattr_t attr;
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
+    pthread_mutex_init(&mMutex, &attr);
+
+    for (int i = 0; i < REQUEST_MAX; i++) {
+        mRequestQueues[i].reset((uint32_t)0);
+    }
+}
+
+void LocationAPIClientBase::locAPISetCallbacks(LocationCallbacks& locationCallbacks)
+{
+    pthread_mutex_lock(&mMutex);
+
+    if (locationCallbacks.geofenceBreachCb != nullptr) {
+        mGeofenceBreachCallback = locationCallbacks.geofenceBreachCb;
+        locationCallbacks.geofenceBreachCb =
+            [this](GeofenceBreachNotification geofenceBreachNotification) {
+                beforeGeofenceBreachCb(geofenceBreachNotification);
+            };
+    }
+
+    locationCallbacks.capabilitiesCb =
+        [this](LocationCapabilitiesMask capabilitiesMask) {
+            onCapabilitiesCb(capabilitiesMask);
+        };
+    locationCallbacks.responseCb = [this](LocationError error, uint32_t id) {
+        onResponseCb(error, id);
+    };
+    locationCallbacks.collectiveResponseCb =
+        [this](size_t count, LocationError* errors, uint32_t* ids) {
+            onCollectiveResponseCb(count, errors, ids);
+        };
+
+    if (locationCallbacks.batchingStatusCb != nullptr) {
+        mBatchingStatusCallback = locationCallbacks.batchingStatusCb;
+        locationCallbacks.batchingStatusCb =
+            [this](BatchingStatusInfo batchStatus, std::list<uint32_t> & tripCompletedList) {
+            beforeBatchingStatusCb(batchStatus, tripCompletedList);
+        };
+    }
+
+    if (mLocationAPI == nullptr ) {
+        mLocationAPI = LocationAPI::createInstance(locationCallbacks);
+    } else {
+        mLocationAPI->updateCallbacks(locationCallbacks);
+    }
+
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::destroy()
+{
+    LOC_LOGD("LocationAPIClientBase::destroy()");
+
+    pthread_mutex_lock(&mMutex);
+
+    mGeofenceBreachCallback = nullptr;
+
+    for (int i = 0; i < REQUEST_MAX; i++) {
+        mRequestQueues[i].reset((uint32_t)0);
+    }
+
+    LocationAPI* localHandle = nullptr;
+    if (nullptr != mLocationAPI) {
+        localHandle = mLocationAPI;
+        mLocationAPI = nullptr;
+    }
+
+    pthread_mutex_unlock(&mMutex);
+
+    // Invoking destroy has the possibility of destroy complete callback
+    // being invoked right away in the same context, hence no instance
+    // member must be accessed after the destroy call.
+    if (nullptr != localHandle) {
+        localHandle->destroy([this]() {onLocationApiDestroyCompleteCb();});
+    }
+}
+
+LocationAPIClientBase::~LocationAPIClientBase()
+{
+    pthread_mutex_destroy(&mMutex);
+}
+
+void LocationAPIClientBase::onLocationApiDestroyCompleteCb()
+{
+    LOC_LOGD("LocationAPIClientBase::onLocationApiDestroyCompleteCb()");
+    delete this;
+}
+
+uint32_t LocationAPIClientBase::locAPIStartTracking(TrackingOptions& options)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        if (mTracking) {
+            LOC_LOGW("%s:%d] Existing tracking session present", __FUNCTION__, __LINE__);
+        } else {
+            uint32_t session = mLocationAPI->startTracking(options);
+            LOC_LOGI("%s:%d] start new session: %d", __FUNCTION__, __LINE__, session);
+            // onResponseCb might be called from other thread immediately after
+            // startTracking returns, so we are not going to unlock mutex
+            // until StartTrackingRequest is pushed into mRequestQueues[REQUEST_TRACKING]
+            mRequestQueues[REQUEST_TRACKING].reset(session);
+            mRequestQueues[REQUEST_TRACKING].push(new StartTrackingRequest(*this));
+            mTracking = true;
+        }
+
+        retVal = LOCATION_ERROR_SUCCESS;
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    return retVal;
+}
+
+void LocationAPIClientBase::locAPIStopTracking()
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t session = 0;
+        session = mRequestQueues[REQUEST_TRACKING].getSession();
+        if (session > 0) {
+            mRequestQueues[REQUEST_TRACKING].push(new StopTrackingRequest(*this));
+            mLocationAPI->stopTracking(session);
+            mTracking = false;
+        } else {
+            LOC_LOGD("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__, session);
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::locAPIUpdateTrackingOptions(TrackingOptions& options)
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t session = 0;
+        session = mRequestQueues[REQUEST_TRACKING].getSession();
+        if (session > 0) {
+            mRequestQueues[REQUEST_TRACKING].push(new UpdateTrackingOptionsRequest(*this));
+            mLocationAPI->updateTrackingOptions(session, options);
+        } else {
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__, session);
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+int32_t LocationAPIClientBase::locAPIGetBatchSize()
+{
+    if (mBatchSize == -1) {
+        const loc_param_s_type flp_conf_param_table[] =
+        {
+            {"BATCH_SIZE", &mBatchSize, nullptr, 'n'},
+        };
+        UTIL_READ_CONF(LOC_PATH_FLP_CONF, flp_conf_param_table);
+        if (mBatchSize < 0) {
+            // set mBatchSize to 0 if we got an illegal value from config file
+            mBatchSize = 0;
+        }
+    }
+    return mBatchSize;
+}
+
+uint32_t LocationAPIClientBase::locAPIStartSession(
+        uint32_t id, uint32_t sessionMode, TrackingOptions&& options)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+
+        if (mSessionBiDict.hasId(id)) {
+            LOC_LOGE("%s:%d] session %d has already started.", __FUNCTION__, __LINE__, id);
+            retVal = LOCATION_ERROR_ALREADY_STARTED;
+        } else {
+            uint32_t trackingSession = 0;
+            uint32_t batchingSession = 0;
+
+            if (sessionMode == SESSION_MODE_ON_FIX) {
+                trackingSession = mLocationAPI->startTracking(options);
+                LOC_LOGI("%s:%d] start new session: %d", __FUNCTION__, __LINE__, trackingSession);
+                mRequestQueues[REQUEST_SESSION].push(new StartTrackingRequest(*this));
+            } else {
+                // Fill in the batch mode
+                BatchingOptions batchOptions = {};
+                batchOptions.size = sizeof(BatchingOptions);
+                switch (sessionMode) {
+                case SESSION_MODE_ON_FULL:
+                    batchOptions.batchingMode = BATCHING_MODE_ROUTINE;
+                    break;
+                case SESSION_MODE_ON_TRIP_COMPLETED:
+                    batchOptions.batchingMode = BATCHING_MODE_TRIP;
+                    break;
+                default:
+                    batchOptions.batchingMode = BATCHING_MODE_NO_AUTO_REPORT;
+                    break;
+                }
+
+                // Populate location option values
+                batchOptions.minDistance = options.minDistance;
+                batchOptions.minInterval = options.minInterval;
+                batchOptions.mode = options.mode;
+
+                batchingSession = mLocationAPI->startBatching(batchOptions);
+                LOC_LOGI("%s:%d] start new session: %d", __FUNCTION__, __LINE__, batchingSession);
+                mRequestQueues[REQUEST_SESSION].setSession(batchingSession);
+                mRequestQueues[REQUEST_SESSION].push(new StartBatchingRequest(*this));
+            }
+
+            uint32_t session = ((sessionMode != SESSION_MODE_ON_FIX) ?
+                    batchingSession : trackingSession);
+
+            SessionEntity entity;
+            entity.id = id;
+            entity.trackingSession = trackingSession;
+            entity.batchingSession = batchingSession;
+            entity.sessionMode = sessionMode;
+            mSessionBiDict.set(id, session, entity);
+
+            retVal = LOCATION_ERROR_SUCCESS;
+        }
+
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    return retVal;
+}
+
+uint32_t LocationAPIClientBase::locAPIStopSession(uint32_t id)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+
+        if (mSessionBiDict.hasId(id)) {
+            SessionEntity entity = mSessionBiDict.getExtById(id);
+
+            uint32_t trackingSession = entity.trackingSession;
+            uint32_t batchingSession = entity.batchingSession;
+            uint32_t sMode = entity.sessionMode;
+
+            if (sMode == SESSION_MODE_ON_FIX) {
+                mRequestQueues[REQUEST_SESSION].push(new StopTrackingRequest(*this));
+                mLocationAPI->stopTracking(trackingSession);
+            } else {
+                mRequestQueues[REQUEST_SESSION].push(new StopBatchingRequest(*this));
+                mLocationAPI->stopBatching(batchingSession);
+            }
+
+            retVal = LOCATION_ERROR_SUCCESS;
+        } else {
+            retVal = LOCATION_ERROR_ID_UNKNOWN;
+            LOC_LOGE("%s:%d] session %d is not exist.", __FUNCTION__, __LINE__, id);
+        }
+
+    }
+    pthread_mutex_unlock(&mMutex);
+    return retVal;
+}
+
+uint32_t LocationAPIClientBase::locAPIUpdateSessionOptions(
+        uint32_t id, uint32_t sessionMode, TrackingOptions&& options)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+
+        if (mSessionBiDict.hasId(id)) {
+            SessionEntity entity = mSessionBiDict.getExtById(id);
+
+            uint32_t trackingSession = entity.trackingSession;
+            uint32_t batchingSession = entity.batchingSession;
+            uint32_t sMode = entity.sessionMode;
+
+            if (sessionMode == SESSION_MODE_ON_FIX) {
+                // we only add an UpdateTrackingOptionsRequest to mRequestQueues[REQUEST_SESSION],
+                // even if this update request will stop batching and then start tracking.
+                mRequestQueues[REQUEST_SESSION].push(new UpdateTrackingOptionsRequest(*this));
+                if (sMode == SESSION_MODE_ON_FIX) {
+                    mLocationAPI->updateTrackingOptions(trackingSession, options);
+                } else  {
+                    // stop batching
+                    // batchingSession will be removed from mSessionBiDict soon,
+                    // so we don't need to add a new request to mRequestQueues[REQUEST_SESSION].
+                    mLocationAPI->stopBatching(batchingSession);
+                    batchingSession = 0;
+                    mRequestQueues[REQUEST_SESSION].setSession(batchingSession);
+
+                    // start tracking
+                    trackingSession = mLocationAPI->startTracking(options);
+                    LOC_LOGI("%s:%d] start new session: %d",
+                            __FUNCTION__, __LINE__, trackingSession);
+                }
+            } else {
+                // we only add an UpdateBatchingOptionsRequest to mRequestQueues[REQUEST_SESSION],
+                // even if this update request will stop tracking and then start batching.
+                mRequestQueues[REQUEST_SESSION].push(new UpdateBatchingOptionsRequest(*this));
+                BatchingOptions batchOptions = {};
+                batchOptions.size = sizeof(BatchingOptions);
+                switch (sessionMode) {
+                case SESSION_MODE_ON_FULL:
+                    batchOptions.batchingMode = BATCHING_MODE_ROUTINE;
+                    break;
+                case SESSION_MODE_ON_TRIP_COMPLETED:
+                    batchOptions.batchingMode = BATCHING_MODE_TRIP;
+                    break;
+                default:
+                    batchOptions.batchingMode = BATCHING_MODE_NO_AUTO_REPORT;
+                    break;
+                }
+
+                if (sMode == SESSION_MODE_ON_FIX) {
+                    // stop tracking
+                    // trackingSession will be removed from mSessionBiDict soon,
+                    // so we don't need to add a new request to mRequestQueues[REQUEST_SESSION].
+                    mLocationAPI->stopTracking(trackingSession);
+                    trackingSession = 0;
+
+                    // Populate location option values
+                    batchOptions.minDistance = options.minDistance;
+                    batchOptions.minInterval = options.minInterval;
+                    batchOptions.mode = options.mode;
+
+                    // start batching
+                    batchingSession = mLocationAPI->startBatching(batchOptions);
+                    LOC_LOGI("%s:%d] start new session: %d",
+                            __FUNCTION__, __LINE__, batchingSession);
+                    mRequestQueues[REQUEST_SESSION].setSession(batchingSession);
+                } else {
+                    mLocationAPI->updateBatchingOptions(batchingSession, batchOptions);
+                }
+
+            }
+
+            uint32_t session = ((sessionMode != SESSION_MODE_ON_FIX) ?
+                    batchingSession : trackingSession);
+
+            entity.trackingSession = trackingSession;
+            entity.batchingSession = batchingSession;
+            entity.sessionMode = sessionMode;
+            // remove the old values from mSessionBiDict before we add a new one.
+            mSessionBiDict.rmById(id);
+            mSessionBiDict.set(id, session, entity);
+
+            retVal = LOCATION_ERROR_SUCCESS;
+        } else {
+            retVal = LOCATION_ERROR_ID_UNKNOWN;
+            LOC_LOGE("%s:%d] session %d is not exist.", __FUNCTION__, __LINE__, id);
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+    return retVal;
+}
+
+uint32_t LocationAPIClientBase::locAPIGetBatchedLocations(uint32_t id, size_t count)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        if (mSessionBiDict.hasId(id)) {
+            SessionEntity entity = mSessionBiDict.getExtById(id);
+            if (entity.sessionMode != SESSION_MODE_ON_FIX) {
+                uint32_t batchingSession = entity.batchingSession;
+                mRequestQueues[REQUEST_SESSION].push(new GetBatchedLocationsRequest(*this));
+                mLocationAPI->getBatchedLocations(batchingSession, count);
+                retVal = LOCATION_ERROR_SUCCESS;
+            }  else {
+                LOC_LOGE("%s:%d] Unsupported for session id: %d, mode is SESSION_MODE_ON_FIX",
+                            __FUNCTION__, __LINE__, id);
+                retVal = LOCATION_ERROR_NOT_SUPPORTED;
+            }
+        }  else {
+            retVal = LOCATION_ERROR_ID_UNKNOWN;
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__, id);
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    return retVal;
+}
+
+uint32_t LocationAPIClientBase::locAPIAddGeofences(
+        size_t count, uint32_t* ids, GeofenceOption* options, GeofenceInfo* data)
+{
+    uint32_t retVal = LOCATION_ERROR_GENERAL_FAILURE;
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        if (mRequestQueues[REQUEST_GEOFENCE].getSession() != GEOFENCE_SESSION_ID) {
+            mRequestQueues[REQUEST_GEOFENCE].reset(GEOFENCE_SESSION_ID);
+        }
+        uint32_t* sessions = mLocationAPI->addGeofences(count, options, data);
+        if (sessions) {
+            LOC_LOGI("%s:%d] start new sessions: %p", __FUNCTION__, __LINE__, sessions);
+            mRequestQueues[REQUEST_GEOFENCE].push(new AddGeofencesRequest(*this));
+
+            for (size_t i = 0; i < count; i++) {
+                mGeofenceBiDict.set(ids[i], sessions[i], options[i].breachTypeMask);
+            }
+            retVal = LOCATION_ERROR_SUCCESS;
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    return retVal;
+}
+
+void LocationAPIClientBase::locAPIRemoveGeofences(size_t count, uint32_t* ids)
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t* sessions = (uint32_t*)malloc(sizeof(uint32_t) * count);
+        if (sessions == NULL) {
+            LOC_LOGE("%s:%d] Failed to allocate %zu bytes !",
+                    __FUNCTION__, __LINE__, sizeof(uint32_t) * count);
+            pthread_mutex_unlock(&mMutex);
+            return;
+        }
+
+        if (mRequestQueues[REQUEST_GEOFENCE].getSession() == GEOFENCE_SESSION_ID) {
+            BiDict<GeofenceBreachTypeMask>* removedGeofenceBiDict =
+                    new BiDict<GeofenceBreachTypeMask>();
+            size_t j = 0;
+            for (size_t i = 0; i < count; i++) {
+                sessions[j] = mGeofenceBiDict.getSession(ids[i]);
+                if (sessions[j] > 0) {
+                    GeofenceBreachTypeMask type = mGeofenceBiDict.getExtBySession(sessions[j]);
+                    mGeofenceBiDict.rmBySession(sessions[j]);
+                    removedGeofenceBiDict->set(ids[i], sessions[j], type);
+                    j++;
+                }
+            }
+            if (j > 0) {
+                mRequestQueues[REQUEST_GEOFENCE].push(new RemoveGeofencesRequest(*this,
+                        removedGeofenceBiDict));
+                mLocationAPI->removeGeofences(j, sessions);
+            } else {
+                delete(removedGeofenceBiDict);
+            }
+        } else {
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__,
+                    mRequestQueues[REQUEST_GEOFENCE].getSession());
+        }
+
+        free(sessions);
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::locAPIModifyGeofences(
+        size_t count, uint32_t* ids, GeofenceOption* options)
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t* sessions = (uint32_t*)malloc(sizeof(uint32_t) * count);
+        if (sessions == NULL) {
+            LOC_LOGE("%s:%d] Failed to allocate %zu bytes !",
+                    __FUNCTION__, __LINE__, sizeof(uint32_t) * count);
+            pthread_mutex_unlock(&mMutex);
+            return;
+        }
+
+        if (mRequestQueues[REQUEST_GEOFENCE].getSession() == GEOFENCE_SESSION_ID) {
+            size_t j = 0;
+            for (size_t i = 0; i < count; i++) {
+                sessions[j] = mGeofenceBiDict.getSession(ids[i]);
+                if (sessions[j] > 0) {
+                    mGeofenceBiDict.set(ids[i], sessions[j], options[i].breachTypeMask);
+                    j++;
+                }
+            }
+            if (j > 0) {
+                mRequestQueues[REQUEST_GEOFENCE].push(new ModifyGeofencesRequest(*this));
+                mLocationAPI->modifyGeofences(j, sessions, options);
+            }
+        } else {
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__,
+                    mRequestQueues[REQUEST_GEOFENCE].getSession());
+        }
+
+        free(sessions);
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::locAPIPauseGeofences(size_t count, uint32_t* ids)
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t* sessions = (uint32_t*)malloc(sizeof(uint32_t) * count);
+        if (sessions == NULL) {
+            LOC_LOGE("%s:%d] Failed to allocate %zu bytes !",
+                    __FUNCTION__, __LINE__, sizeof(uint32_t) * count);
+            pthread_mutex_unlock(&mMutex);
+            return;
+        }
+
+        if (mRequestQueues[REQUEST_GEOFENCE].getSession() == GEOFENCE_SESSION_ID) {
+            size_t j = 0;
+            for (size_t i = 0; i < count; i++) {
+                sessions[j] = mGeofenceBiDict.getSession(ids[i]);
+                if (sessions[j] > 0) {
+                    j++;
+                }
+            }
+            if (j > 0) {
+                mRequestQueues[REQUEST_GEOFENCE].push(new PauseGeofencesRequest(*this));
+                mLocationAPI->pauseGeofences(j, sessions);
+            }
+        } else {
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__,
+                    mRequestQueues[REQUEST_GEOFENCE].getSession());
+        }
+
+        free(sessions);
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::locAPIResumeGeofences(
+        size_t count, uint32_t* ids, GeofenceBreachTypeMask* mask)
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t* sessions = (uint32_t*)malloc(sizeof(uint32_t) * count);
+        if (sessions == NULL) {
+            LOC_LOGE("%s:%d] Failed to allocate %zu bytes !",
+                    __FUNCTION__, __LINE__, sizeof(uint32_t) * count);
+            pthread_mutex_unlock(&mMutex);
+            return;
+        }
+
+        if (mRequestQueues[REQUEST_GEOFENCE].getSession() == GEOFENCE_SESSION_ID) {
+            size_t j = 0;
+            for (size_t i = 0; i < count; i++) {
+                sessions[j] = mGeofenceBiDict.getSession(ids[i]);
+                if (sessions[j] > 0) {
+                    if (mask) {
+                        mGeofenceBiDict.set(ids[i], sessions[j], mask[i]);
+                    }
+                    j++;
+                }
+            }
+            if (j > 0) {
+                mRequestQueues[REQUEST_GEOFENCE].push(new ResumeGeofencesRequest(*this));
+                mLocationAPI->resumeGeofences(j, sessions);
+            }
+        } else {
+            LOC_LOGE("%s:%d] invalid session: %d.", __FUNCTION__, __LINE__,
+                    mRequestQueues[REQUEST_GEOFENCE].getSession());
+        }
+
+        free(sessions);
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::locAPIRemoveAllGeofences()
+{
+    std::vector<uint32_t> sessionsVec = mGeofenceBiDict.getAllSessions();
+    if (sessionsVec.size() > 0) {
+        locAPIRemoveGeofences(sessionsVec.size(), &sessionsVec[0]);
+    }
+}
+
+void LocationAPIClientBase::locAPIGnssNiResponse(uint32_t id, GnssNiResponse response)
+{
+    pthread_mutex_lock(&mMutex);
+    if (mLocationAPI) {
+        uint32_t session = id;
+        mLocationAPI->gnssNiResponse(id, response);
+        LOC_LOGI("%s:%d] start new session: %d", __FUNCTION__, __LINE__, session);
+        mRequestQueues[REQUEST_NIRESPONSE].reset(session);
+        mRequestQueues[REQUEST_NIRESPONSE].push(new GnssNiResponseRequest(*this));
+    }
+    pthread_mutex_unlock(&mMutex);
+}
+
+void LocationAPIClientBase::beforeGeofenceBreachCb(
+        GeofenceBreachNotification geofenceBreachNotification)
+{
+    uint32_t* ids = (uint32_t*)malloc(sizeof(uint32_t) * geofenceBreachNotification.count);
+    uint32_t* backup = geofenceBreachNotification.ids;
+    size_t n = geofenceBreachNotification.count;
+    geofenceBreachCallback genfenceCallback = nullptr;
+
+    if (ids == NULL) {
+        LOC_LOGE("%s:%d] Failed to alloc %zu bytes",
+                __FUNCTION__, __LINE__,
+                sizeof(uint32_t) * geofenceBreachNotification.count);
+        return;
+    }
+
+    pthread_mutex_lock(&mMutex);
+    if (mGeofenceBreachCallback != nullptr) {
+        size_t count = 0;
+        for (size_t i = 0; i < n; i++) {
+            uint32_t id = mGeofenceBiDict.getId(geofenceBreachNotification.ids[i]);
+            GeofenceBreachTypeMask type =
+                mGeofenceBiDict.getExtBySession(geofenceBreachNotification.ids[i]);
+            // if type == 0, we will not head into the fllowing block anyway.
+            // so we don't need to check id and type
+            if ((geofenceBreachNotification.type == GEOFENCE_BREACH_ENTER &&
+                        (type & GEOFENCE_BREACH_ENTER_BIT)) ||
+                    (geofenceBreachNotification.type == GEOFENCE_BREACH_EXIT &&
+                     (type & GEOFENCE_BREACH_EXIT_BIT))
+               ) {
+                ids[count] = id;
+                count++;
+            }
+        }
+        geofenceBreachNotification.count = count;
+        geofenceBreachNotification.ids = ids;
+
+        genfenceCallback = mGeofenceBreachCallback;
+    }
+    pthread_mutex_unlock(&mMutex);
+
+    if (genfenceCallback != nullptr) {
+        genfenceCallback(geofenceBreachNotification);
+    }
+
+    // restore ids
+    geofenceBreachNotification.ids = backup;
+    geofenceBreachNotification.count = n;
+    free(ids);
+}
+
+void LocationAPIClientBase::beforeBatchingStatusCb(BatchingStatusInfo batchStatus,
+        std::list<uint32_t> & tripCompletedList) {
+
+    // map the trip ids to the client ids
+    std::list<uint32_t> tripCompletedClientIdList;
+    tripCompletedClientIdList.clear();
+
+    if (batchStatus.batchingStatus == BATCHING_STATUS_TRIP_COMPLETED) {
+        for (auto itt = tripCompletedList.begin(); itt != tripCompletedList.end(); itt++) {
+            if (mSessionBiDict.hasSession(*itt)) {
+                SessionEntity sessEntity = mSessionBiDict.getExtBySession(*itt);
+
+                if (sessEntity.sessionMode == SESSION_MODE_ON_TRIP_COMPLETED) {
+                    tripCompletedClientIdList.push_back(sessEntity.id);
+                    mSessionBiDict.rmBySession(*itt);
+                }
+            }
+        }
+    }
+
+    mBatchingStatusCallback(batchStatus, tripCompletedClientIdList);
+}
+
+void LocationAPIClientBase::onResponseCb(LocationError error, uint32_t id)
+{
+    if (error != LOCATION_ERROR_SUCCESS) {
+        LOC_LOGE("%s:%d] ERROR: %d ID: %d", __FUNCTION__, __LINE__, error, id);
+    } else {
+        LOC_LOGV("%s:%d] SUCCESS: %d id: %d", __FUNCTION__, __LINE__, error, id);
+    }
+    LocationAPIRequest* request = getRequestBySession(id);
+    if (request) {
+        request->onResponse(error, id);
+        delete request;
+    }
+}
+
+void LocationAPIClientBase::onCollectiveResponseCb(
+        size_t count, LocationError* errors, uint32_t* ids)
+{
+    for (size_t i = 0; i < count; i++) {
+        if (errors[i] != LOCATION_ERROR_SUCCESS) {
+            LOC_LOGE("%s:%d] ERROR: %d ID: %d", __FUNCTION__, __LINE__, errors[i], ids[i]);
+        } else {
+            LOC_LOGV("%s:%d] SUCCESS: %d id: %d", __FUNCTION__, __LINE__, errors[i], ids[i]);
+        }
+    }
+    LocationAPIRequest* request = nullptr;
+    pthread_mutex_lock(&mMutex);
+    if (mRequestQueues[REQUEST_GEOFENCE].getSession() == GEOFENCE_SESSION_ID) {
+        request = mRequestQueues[REQUEST_GEOFENCE].pop();
+    }
+    pthread_mutex_unlock(&mMutex);
+    if (request) {
+        request->onCollectiveResponse(count, errors, ids);
+        delete request;
+    }
+}
+
+void LocationAPIClientBase::removeSession(uint32_t session) {
+    if (mSessionBiDict.hasSession(session)) {
+        mSessionBiDict.rmBySession(session);
+    }
+}
+
+LocationAPIRequest* LocationAPIClientBase::getRequestBySession(uint32_t session)
+{
+    pthread_mutex_lock(&mMutex);
+    LocationAPIRequest* request = nullptr;
+    for (int i = 0; i < REQUEST_MAX; i++) {
+        if (i != REQUEST_GEOFENCE &&
+                i != REQUEST_SESSION &&
+                mRequestQueues[i].getSession() == session) {
+            request = mRequestQueues[i].pop();
+            break;
+        }
+    }
+    if (request == nullptr) {
+        // Can't find a request with correct session,
+        // try to find it from mSessionBiDict
+        if (mSessionBiDict.hasSession(session)) {
+            request = mRequestQueues[REQUEST_SESSION].pop();
+        }
+    }
+    pthread_mutex_unlock(&mMutex);
+    return request;
+}
diff --git a/gps/location/LocationAPIClientBase.h b/gps/location/LocationAPIClientBase.h
new file mode 100644
index 0000000..ac1ebe6
--- /dev/null
+++ b/gps/location/LocationAPIClientBase.h
@@ -0,0 +1,592 @@
+/* Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LOCATION_API_CLINET_BASE_H
+#define LOCATION_API_CLINET_BASE_H
+
+#include <stdint.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <queue>
+#include <map>
+
+#include "LocationAPI.h"
+#include <loc_pla.h>
+#include <log_util.h>
+
+enum SESSION_MODE {
+    SESSION_MODE_NONE = 0,
+    SESSION_MODE_ON_FULL,
+    SESSION_MODE_ON_FIX,
+    SESSION_MODE_ON_TRIP_COMPLETED
+};
+
+enum REQUEST_TYPE {
+    REQUEST_TRACKING = 0,
+    REQUEST_SESSION,
+    REQUEST_GEOFENCE,
+    REQUEST_NIRESPONSE,
+    REQUEST_MAX,
+};
+
+enum CTRL_REQUEST_TYPE {
+    CTRL_REQUEST_DELETEAIDINGDATA = 0,
+    CTRL_REQUEST_CONTROL,
+    CTRL_REQUEST_CONFIG_UPDATE,
+    CTRL_REQUEST_CONFIG_GET,
+    CTRL_REQUEST_MAX,
+};
+
+class LocationAPIClientBase;
+
+class LocationAPIRequest {
+public:
+    LocationAPIRequest() {}
+    virtual ~LocationAPIRequest() {}
+    virtual void onResponse(LocationError /*error*/, uint32_t /*id*/) {}
+    virtual void onCollectiveResponse(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+};
+
+class RequestQueue {
+public:
+    RequestQueue(): mSession(0), mSessionArrayPtr(nullptr) {
+    }
+    virtual ~RequestQueue() {
+        reset((uint32_t)0);
+    }
+    void inline setSession(uint32_t session) { mSession = session; }
+    void inline setSessionArrayPtr(uint32_t* ptr) { mSessionArrayPtr = ptr; }
+    void reset(uint32_t session) {
+        LocationAPIRequest* request = nullptr;
+        while (!mQueue.empty()) {
+            request = mQueue.front();
+            mQueue.pop();
+            delete request;
+        }
+        mSession = session;
+    }
+    void reset(uint32_t* sessionArrayPtr) {
+        reset((uint32_t)0);
+        mSessionArrayPtr = sessionArrayPtr;
+    }
+    void push(LocationAPIRequest* request) {
+        mQueue.push(request);
+    }
+    LocationAPIRequest* pop() {
+        LocationAPIRequest* request = nullptr;
+        if (!mQueue.empty()) {
+            request = mQueue.front();
+            mQueue.pop();
+        }
+        return request;
+    }
+    uint32_t getSession() { return mSession; }
+    uint32_t* getSessionArrayPtr() { return mSessionArrayPtr; }
+private:
+    uint32_t mSession;
+    uint32_t* mSessionArrayPtr;
+    std::queue<LocationAPIRequest*> mQueue;
+};
+
+class LocationAPIControlClient {
+public:
+    LocationAPIControlClient();
+    virtual ~LocationAPIControlClient();
+    LocationAPIControlClient(const LocationAPIControlClient&) = delete;
+    LocationAPIControlClient& operator=(const LocationAPIControlClient&) = delete;
+
+    LocationAPIRequest* getRequestBySession(uint32_t session);
+    LocationAPIRequest* getRequestBySessionArrayPtr(uint32_t* sessionArrayPtr);
+
+    // LocationControlAPI
+    uint32_t locAPIGnssDeleteAidingData(GnssAidingData& data);
+    uint32_t locAPIEnable(LocationTechnologyType techType);
+    void locAPIDisable();
+    uint32_t locAPIGnssUpdateConfig(GnssConfig config);
+    uint32_t locAPIGnssGetConfig(GnssConfigFlagsMask config);
+    inline LocationControlAPI* getControlAPI() { return mLocationControlAPI; }
+
+    // callbacks
+    void onCtrlResponseCb(LocationError error, uint32_t id);
+    void onCtrlCollectiveResponseCb(size_t count, LocationError* errors, uint32_t* ids);
+
+    inline virtual void onGnssDeleteAidingDataCb(LocationError /*error*/) {}
+    inline virtual void onEnableCb(LocationError /*error*/) {}
+    inline virtual void onDisableCb(LocationError /*error*/) {}
+    inline virtual void onGnssUpdateConfigCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+    inline virtual void onGnssGetConfigCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+
+    class GnssDeleteAidingDataRequest : public LocationAPIRequest {
+    public:
+        GnssDeleteAidingDataRequest(LocationAPIControlClient& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onGnssDeleteAidingDataCb(error);
+        }
+        LocationAPIControlClient& mAPI;
+    };
+
+    class EnableRequest : public LocationAPIRequest {
+    public:
+        EnableRequest(LocationAPIControlClient& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onEnableCb(error);
+        }
+        LocationAPIControlClient& mAPI;
+    };
+
+    class DisableRequest : public LocationAPIRequest {
+    public:
+        DisableRequest(LocationAPIControlClient& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onDisableCb(error);
+        }
+        LocationAPIControlClient& mAPI;
+    };
+
+    class GnssUpdateConfigRequest : public LocationAPIRequest {
+    public:
+        GnssUpdateConfigRequest(LocationAPIControlClient& API) : mAPI(API) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* ids) {
+            mAPI.onGnssUpdateConfigCb(count, errors, ids);
+        }
+        LocationAPIControlClient& mAPI;
+    };
+
+    class GnssGetConfigRequest : public LocationAPIRequest {
+    public:
+        GnssGetConfigRequest(LocationAPIControlClient& API) : mAPI(API) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* ids) {
+            mAPI.onGnssGetConfigCb(count, errors, ids);
+        }
+        LocationAPIControlClient& mAPI;
+    };
+
+private:
+    pthread_mutex_t mMutex;
+    LocationControlAPI* mLocationControlAPI;
+    RequestQueue mRequestQueues[CTRL_REQUEST_MAX];
+    bool mEnabled;
+    GnssConfig mConfig;
+};
+
+class LocationAPIClientBase {
+public:
+    LocationAPIClientBase();
+    LocationAPIClientBase(const LocationAPIClientBase&) = delete;
+    LocationAPIClientBase& operator=(const LocationAPIClientBase&) = delete;
+
+    void destroy();
+    void onLocationApiDestroyCompleteCb();
+
+    void locAPISetCallbacks(LocationCallbacks& locationCallbacks);
+    void removeSession(uint32_t session);
+    LocationAPIRequest* getRequestBySession(uint32_t session);
+
+    // LocationAPI
+    uint32_t locAPIStartTracking(TrackingOptions& trackingOptions);
+    void locAPIStopTracking();
+    void locAPIUpdateTrackingOptions(TrackingOptions& trackingOptions);
+
+    int32_t locAPIGetBatchSize();
+    uint32_t locAPIStartSession(
+            uint32_t id, uint32_t sessionMode, TrackingOptions&& trackingOptions);
+    uint32_t locAPIStopSession(uint32_t id);
+    uint32_t locAPIUpdateSessionOptions(
+            uint32_t id, uint32_t sessionMode, TrackingOptions&& trackingOptions);
+    uint32_t locAPIGetBatchedLocations(uint32_t id, size_t count);
+
+    uint32_t locAPIAddGeofences(size_t count, uint32_t* ids,
+            GeofenceOption* options, GeofenceInfo* data);
+    void locAPIRemoveGeofences(size_t count, uint32_t* ids);
+    void locAPIModifyGeofences(size_t count, uint32_t* ids, GeofenceOption* options);
+    void locAPIPauseGeofences(size_t count, uint32_t* ids);
+    void locAPIResumeGeofences(size_t count, uint32_t* ids, GeofenceBreachTypeMask* mask);
+    void locAPIRemoveAllGeofences();
+
+    void locAPIGnssNiResponse(uint32_t id, GnssNiResponse response);
+
+    // callbacks
+    void onResponseCb(LocationError error, uint32_t id);
+    void onCollectiveResponseCb(size_t count, LocationError* errors, uint32_t* ids);
+
+    void beforeGeofenceBreachCb(GeofenceBreachNotification geofenceBreachNotification);
+
+    inline virtual void onCapabilitiesCb(LocationCapabilitiesMask /*capabilitiesMask*/) {}
+    inline virtual void onGnssNmeaCb(GnssNmeaNotification /*gnssNmeaNotification*/) {}
+    inline virtual void onGnssDataCb(GnssDataNotification /*gnssDataNotification*/) {}
+    inline virtual void onGnssMeasurementsCb(
+            GnssMeasurementsNotification /*gnssMeasurementsNotification*/) {}
+
+    inline virtual void onTrackingCb(Location /*location*/) {}
+    inline virtual void onGnssSvCb(GnssSvNotification /*gnssSvNotification*/) {}
+    inline virtual void onStartTrackingCb(LocationError /*error*/) {}
+    inline virtual void onStopTrackingCb(LocationError /*error*/) {}
+    inline virtual void onUpdateTrackingOptionsCb(LocationError /*error*/) {}
+
+    inline virtual void onGnssLocationInfoCb(
+            GnssLocationInfoNotification /*gnssLocationInfoNotification*/) {}
+
+    inline virtual void onBatchingCb(size_t /*count*/, Location* /*location*/,
+            BatchingOptions /*batchingOptions*/) {}
+    inline virtual void onBatchingStatusCb(BatchingStatusInfo /*batchingStatus*/,
+            std::list<uint32_t> &/*listOfCompletedTrips*/) {}
+    void beforeBatchingStatusCb(BatchingStatusInfo batchStatus,
+            std::list<uint32_t> & tripCompletedList);
+    inline virtual void onStartBatchingCb(LocationError /*error*/) {}
+    inline virtual void onStopBatchingCb(LocationError /*error*/) {}
+    inline virtual void onUpdateBatchingOptionsCb(LocationError /*error*/) {}
+    inline virtual void onGetBatchedLocationsCb(LocationError /*error*/) {}
+
+    inline virtual void onGeofenceBreachCb(
+            GeofenceBreachNotification /*geofenceBreachNotification*/) {}
+    inline virtual void onGeofenceStatusCb(
+            GeofenceStatusNotification /*geofenceStatusNotification*/) {}
+    inline virtual void onAddGeofencesCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+    inline virtual void onRemoveGeofencesCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+    inline virtual void onModifyGeofencesCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+    inline virtual void onPauseGeofencesCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+    inline virtual void onResumeGeofencesCb(
+            size_t /*count*/, LocationError* /*errors*/, uint32_t* /*ids*/) {}
+
+    inline virtual void onGnssNiCb(uint32_t /*id*/, GnssNiNotification /*gnssNiNotification*/) {}
+    inline virtual void onGnssNiResponseCb(LocationError /*error*/) {}
+
+    inline virtual void onLocationSystemInfoCb(LocationSystemInfo /*locationSystemInfo*/) {}
+
+protected:
+    virtual ~LocationAPIClientBase();
+
+private:
+    // private inner classes
+    typedef struct {
+        uint32_t id;
+        uint32_t trackingSession;
+        uint32_t batchingSession;
+        uint32_t sessionMode;
+    } SessionEntity;
+
+    template<typename T>
+    class BiDict {
+    public:
+        BiDict() {
+            pthread_mutex_init(&mBiDictMutex, nullptr);
+        }
+        virtual ~BiDict() {
+            pthread_mutex_destroy(&mBiDictMutex);
+        }
+        bool hasId(uint32_t id) {
+            pthread_mutex_lock(&mBiDictMutex);
+            bool ret = (mForwardMap.find(id) != mForwardMap.end());
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+        bool hasSession(uint32_t session) {
+            pthread_mutex_lock(&mBiDictMutex);
+            bool ret = (mBackwardMap.find(session) != mBackwardMap.end());
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+        void set(uint32_t id, uint32_t session, T& ext) {
+            pthread_mutex_lock(&mBiDictMutex);
+            mForwardMap[id] = session;
+            mBackwardMap[session] = id;
+            mExtMap[session] = ext;
+            pthread_mutex_unlock(&mBiDictMutex);
+        }
+        void clear() {
+            pthread_mutex_lock(&mBiDictMutex);
+            mForwardMap.clear();
+            mBackwardMap.clear();
+            mExtMap.clear();
+            pthread_mutex_unlock(&mBiDictMutex);
+        }
+        void rmById(uint32_t id) {
+            pthread_mutex_lock(&mBiDictMutex);
+            mBackwardMap.erase(mForwardMap[id]);
+            mExtMap.erase(mForwardMap[id]);
+            mForwardMap.erase(id);
+            pthread_mutex_unlock(&mBiDictMutex);
+        }
+        void rmBySession(uint32_t session) {
+            pthread_mutex_lock(&mBiDictMutex);
+            mForwardMap.erase(mBackwardMap[session]);
+            mBackwardMap.erase(session);
+            mExtMap.erase(session);
+            pthread_mutex_unlock(&mBiDictMutex);
+        }
+        uint32_t getId(uint32_t session) {
+            pthread_mutex_lock(&mBiDictMutex);
+            uint32_t ret = 0;
+            auto it = mBackwardMap.find(session);
+            if (it != mBackwardMap.end()) {
+                ret = it->second;
+            }
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+        uint32_t getSession(uint32_t id) {
+            pthread_mutex_lock(&mBiDictMutex);
+            uint32_t ret = 0;
+            auto it = mForwardMap.find(id);
+            if (it != mForwardMap.end()) {
+                ret = it->second;
+            }
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+        T getExtById(uint32_t id) {
+            pthread_mutex_lock(&mBiDictMutex);
+            T ret;
+            memset(&ret, 0, sizeof(T));
+            uint32_t session = mForwardMap[id];
+            if (session > 0) {
+                auto it = mExtMap.find(session);
+                if (it != mExtMap.end()) {
+                    ret = it->second;
+                }
+            }
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+        T getExtBySession(uint32_t session) {
+            pthread_mutex_lock(&mBiDictMutex);
+            T ret;
+            memset(&ret, 0, sizeof(T));
+            auto it = mExtMap.find(session);
+            if (it != mExtMap.end()) {
+                ret = it->second;
+            }
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+        std::vector<uint32_t> getAllSessions() {
+            std::vector<uint32_t> ret;
+            pthread_mutex_lock(&mBiDictMutex);
+            for (auto it = mBackwardMap.begin(); it != mBackwardMap.end(); it++) {
+                ret.push_back(it->first);
+            }
+            pthread_mutex_unlock(&mBiDictMutex);
+            return ret;
+        }
+    private:
+        pthread_mutex_t mBiDictMutex;
+        // mForwarMap mapping id->session
+        std::map<uint32_t, uint32_t> mForwardMap;
+        // mBackwardMap mapping session->id
+        std::map<uint32_t, uint32_t> mBackwardMap;
+        // mExtMap mapping session->ext
+        std::map<uint32_t, T> mExtMap;
+    };
+
+    class StartTrackingRequest : public LocationAPIRequest {
+    public:
+        StartTrackingRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t id) {
+            if (error != LOCATION_ERROR_SUCCESS) {
+                mAPI.removeSession(id);
+            }
+            mAPI.onStartTrackingCb(error);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class StopTrackingRequest : public LocationAPIRequest {
+    public:
+        StopTrackingRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t id) {
+            mAPI.onStopTrackingCb(error);
+            if (error == LOCATION_ERROR_SUCCESS) {
+                mAPI.removeSession(id);
+            }
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class UpdateTrackingOptionsRequest : public LocationAPIRequest {
+    public:
+        UpdateTrackingOptionsRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onUpdateTrackingOptionsCb(error);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class StartBatchingRequest : public LocationAPIRequest {
+    public:
+        StartBatchingRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t id) {
+            if (error != LOCATION_ERROR_SUCCESS) {
+                mAPI.removeSession(id);
+            }
+            mAPI.onStartBatchingCb(error);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class StopBatchingRequest : public LocationAPIRequest {
+    public:
+        StopBatchingRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t id) {
+            mAPI.onStopBatchingCb(error);
+            if (error == LOCATION_ERROR_SUCCESS) {
+                mAPI.removeSession(id);
+            }
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class UpdateBatchingOptionsRequest : public LocationAPIRequest {
+    public:
+        UpdateBatchingOptionsRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onUpdateBatchingOptionsCb(error);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class GetBatchedLocationsRequest : public LocationAPIRequest {
+    public:
+        GetBatchedLocationsRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onGetBatchedLocationsCb(error);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class AddGeofencesRequest : public LocationAPIRequest {
+    public:
+        AddGeofencesRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* sessions) {
+            uint32_t *ids = (uint32_t*)malloc(sizeof(uint32_t) * count);
+            for (size_t i = 0; i < count; i++) {
+                ids[i] = mAPI.mGeofenceBiDict.getId(sessions[i]);
+            }
+            LOC_LOGD("%s:]Returned geofence-id: %d in add geofence", __FUNCTION__, *ids);
+            mAPI.onAddGeofencesCb(count, errors, ids);
+            free(ids);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class RemoveGeofencesRequest : public LocationAPIRequest {
+    public:
+        RemoveGeofencesRequest(LocationAPIClientBase& API,
+                               BiDict<GeofenceBreachTypeMask>* removedGeofenceBiDict) :
+                               mAPI(API), mRemovedGeofenceBiDict(removedGeofenceBiDict) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* sessions) {
+            if (nullptr != mRemovedGeofenceBiDict) {
+                uint32_t *ids = (uint32_t*)malloc(sizeof(uint32_t) * count);
+                for (size_t i = 0; i < count; i++) {
+                    ids[i] = mRemovedGeofenceBiDict->getId(sessions[i]);
+                }
+                LOC_LOGD("%s:]Returned geofence-id: %d in remove geofence", __FUNCTION__, *ids);
+                mAPI.onRemoveGeofencesCb(count, errors, ids);
+                free(ids);
+                delete(mRemovedGeofenceBiDict);
+            } else {
+                LOC_LOGE("%s:%d] Unable to access removed geofences data.", __FUNCTION__, __LINE__);
+            }
+        }
+        LocationAPIClientBase& mAPI;
+        BiDict<GeofenceBreachTypeMask>* mRemovedGeofenceBiDict;
+    };
+
+    class ModifyGeofencesRequest : public LocationAPIRequest {
+    public:
+        ModifyGeofencesRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* sessions) {
+            uint32_t *ids = (uint32_t*)malloc(sizeof(uint32_t) * count);
+            for (size_t i = 0; i < count; i++) {
+                ids[i] = mAPI.mGeofenceBiDict.getId(sessions[i]);
+            }
+            mAPI.onModifyGeofencesCb(count, errors, ids);
+            free(ids);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class PauseGeofencesRequest : public LocationAPIRequest {
+    public:
+        PauseGeofencesRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* sessions) {
+            uint32_t *ids = (uint32_t*)malloc(sizeof(uint32_t) * count);
+            for (size_t i = 0; i < count; i++) {
+                ids[i] = mAPI.mGeofenceBiDict.getId(sessions[i]);
+            }
+            mAPI.onPauseGeofencesCb(count, errors, ids);
+            free(ids);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class ResumeGeofencesRequest : public LocationAPIRequest {
+    public:
+        ResumeGeofencesRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onCollectiveResponse(size_t count, LocationError* errors, uint32_t* sessions) {
+            uint32_t *ids = (uint32_t*)malloc(sizeof(uint32_t) * count);
+            for (size_t i = 0; i < count; i++) {
+                ids[i] = mAPI.mGeofenceBiDict.getId(sessions[i]);
+            }
+            mAPI.onResumeGeofencesCb(count, errors, ids);
+            free(ids);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+    class GnssNiResponseRequest : public LocationAPIRequest {
+    public:
+        GnssNiResponseRequest(LocationAPIClientBase& API) : mAPI(API) {}
+        inline void onResponse(LocationError error, uint32_t /*id*/) {
+            mAPI.onGnssNiResponseCb(error);
+        }
+        LocationAPIClientBase& mAPI;
+    };
+
+private:
+    pthread_mutex_t mMutex;
+
+    geofenceBreachCallback mGeofenceBreachCallback;
+    batchingStatusCallback mBatchingStatusCallback;
+
+    LocationAPI* mLocationAPI;
+
+    RequestQueue mRequestQueues[REQUEST_MAX];
+    BiDict<GeofenceBreachTypeMask> mGeofenceBiDict;
+    BiDict<SessionEntity> mSessionBiDict;
+    int32_t mBatchSize;
+    bool mTracking;
+};
+
+#endif /* LOCATION_API_CLINET_BASE_H */
diff --git a/gps/location/LocationDataTypes.h b/gps/location/LocationDataTypes.h
new file mode 100644
index 0000000..b85464a
--- /dev/null
+++ b/gps/location/LocationDataTypes.h
@@ -0,0 +1,2070 @@
+/* Copyright (c) 2018-2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LOCATIONDATATYPES_H
+#define LOCATIONDATATYPES_H
+
+#include <vector>
+#include <stdint.h>
+#include <functional>
+#include <list>
+#include <string.h>
+#include <string>
+
+#define GNSS_NI_REQUESTOR_MAX  (256)
+#define GNSS_NI_MESSAGE_ID_MAX (2048)
+#define GNSS_SV_MAX            (128)
+#define GNSS_MEASUREMENTS_MAX  (128)
+#define GNSS_UTC_TIME_OFFSET   (3657)
+
+#define GNSS_BUGREPORT_GPS_MIN    (1)
+#define GNSS_BUGREPORT_SBAS_MIN   (120)
+#define GNSS_BUGREPORT_GLO_MIN    (1)
+#define GNSS_BUGREPORT_QZSS_MIN   (193)
+#define GNSS_BUGREPORT_BDS_MIN    (1)
+#define GNSS_BUGREPORT_GAL_MIN    (1)
+#define GNSS_BUGREPORT_NAVIC_MIN  (1)
+
+#define GNSS_MAX_NAME_LENGTH    (8)
+
+typedef enum {
+    LOCATION_ERROR_SUCCESS = 0,
+    LOCATION_ERROR_GENERAL_FAILURE,
+    LOCATION_ERROR_CALLBACK_MISSING,
+    LOCATION_ERROR_INVALID_PARAMETER,
+    LOCATION_ERROR_ID_EXISTS,
+    LOCATION_ERROR_ID_UNKNOWN,
+    LOCATION_ERROR_ALREADY_STARTED,
+    LOCATION_ERROR_GEOFENCES_AT_MAX,
+    LOCATION_ERROR_NOT_SUPPORTED,
+    LOCATION_ERROR_TIMEOUT,
+} LocationError;
+
+// Flags to indicate which values are valid in a Location
+typedef uint16_t LocationFlagsMask;
+typedef enum {
+    LOCATION_HAS_LAT_LONG_BIT          = (1<<0), // location has valid latitude and longitude
+    LOCATION_HAS_ALTITUDE_BIT          = (1<<1), // location has valid altitude
+    LOCATION_HAS_SPEED_BIT             = (1<<2), // location has valid speed
+    LOCATION_HAS_BEARING_BIT           = (1<<3), // location has valid bearing
+    LOCATION_HAS_ACCURACY_BIT          = (1<<4), // location has valid accuracy
+    LOCATION_HAS_VERTICAL_ACCURACY_BIT = (1<<5), // location has valid vertical accuracy
+    LOCATION_HAS_SPEED_ACCURACY_BIT    = (1<<6), // location has valid speed accuracy
+    LOCATION_HAS_BEARING_ACCURACY_BIT  = (1<<7), // location has valid bearing accuracy
+    LOCATION_HAS_SPOOF_MASK            = (1<<8), // location has valid spoof mask
+    LOCATION_HAS_ELAPSED_REAL_TIME     = (1<<9), // location has valid elapsed real time
+    LOCATION_HAS_CONFORMITY_INDEX_BIT  = (1<<10), // location has valid conformity index
+} LocationFlagsBits;
+
+typedef uint16_t LocationTechnologyMask;
+// mask indicating location calculations including...
+typedef enum {
+    LOCATION_TECHNOLOGY_GNSS_BIT                     = (1<<0), // using GNSS
+    LOCATION_TECHNOLOGY_CELL_BIT                     = (1<<1), // using Cell
+    LOCATION_TECHNOLOGY_WIFI_BIT                     = (1<<2), // using WiFi
+    LOCATION_TECHNOLOGY_SENSORS_BIT                  = (1<<3), // using Sensors
+    LOCATION_TECHNOLOGY_REFERENCE_LOCATION_BIT       = (1<<4), // using reference location
+    LOCATION_TECHNOLOGY_INJECTED_COARSE_POSITION_BIT = (1<<5), // using CPI
+    LOCATION_TECHNOLOGY_AFLT_BIT                     = (1<<6), // AFLT
+    LOCATION_TECHNOLOGY_HYBRID_BIT                   = (1<<7), // HYBRID
+    LOCATION_TECHNOLOGY_PPE_BIT                      = (1<<8), // PPE
+    LOCATION_TECHNOLOGY_VEH_BIT                      = (1<<9), // using vehicular data
+    LOCATION_TECHNOLOGY_VIS_BIT                      = (1<<10), // using visual data
+    LOCATION_TECHNOLOGY_DGNSS_BIT                    = (1<<11),  // DGNSS
+} LocationTechnologyBits;
+
+typedef uint32_t LocationSpoofMask;
+typedef enum {
+    LOCATION_POSTION_SPOOFED             = (1<<0), // location position spoofed
+    LOCATION_TIME_SPOOFED                = (1<<1), // location time spoofed
+    LOCATION_NAVIGATION_DATA_SPOOFED     = (1<<2), // location navigation data spoofed
+} LocationSpoofBits;
+
+typedef enum {
+    LOCATION_RELIABILITY_NOT_SET = 0,
+    LOCATION_RELIABILITY_VERY_LOW,
+    LOCATION_RELIABILITY_LOW,
+    LOCATION_RELIABILITY_MEDIUM,
+    LOCATION_RELIABILITY_HIGH,
+} LocationReliability;
+
+typedef uint32_t GnssLocationNavSolutionMask;
+typedef enum {
+    // SBAS ionospheric correction is used
+    LOCATION_SBAS_CORRECTION_IONO_BIT  = (1<<0),
+    // SBAS fast correction is used
+    LOCATION_SBAS_CORRECTION_FAST_BIT  = (1<<1),
+    // SBAS long-tem correction is used
+    LOCATION_SBAS_CORRECTION_LONG_BIT  = (1<<2),
+    // SBAS integrity information is used
+    LOCATION_SBAS_INTEGRITY_BIT        = (1<<3),
+    // Position Report is DGNSS corrected
+    LOCATION_NAV_CORRECTION_DGNSS_BIT  = (1<<4),
+     // Position Report is RTK corrected
+    LOCATION_NAV_CORRECTION_RTK_BIT    = (1<<5),
+    // Position Report is PPP corrected
+    LOCATION_NAV_CORRECTION_PPP_BIT    = (1<<6),
+    // Posiiton Report is RTF fixed corrected
+    LOCATION_NAV_CORRECTION_RTK_FIXED_BIT  = (1<<7),
+    // Position report is computed with only SBAS corrected SVs.
+    LOCATION_NAV_CORRECTION_ONLY_SBAS_CORRECTED_SV_USED_BIT = (1<<8)
+} GnssLocationNavSolutionBits;
+
+typedef uint32_t GnssLocationPosDataMask;
+typedef enum {
+    LOCATION_NAV_DATA_HAS_LONG_ACCEL_BIT  = (1<<0), // Navigation data has Forward Acceleration
+    LOCATION_NAV_DATA_HAS_LAT_ACCEL_BIT   = (1<<1), // Navigation data has Sideward Acceleration
+    LOCATION_NAV_DATA_HAS_VERT_ACCEL_BIT  = (1<<2), // Navigation data has Vertical Acceleration
+    LOCATION_NAV_DATA_HAS_YAW_RATE_BIT    = (1<<3), // Navigation data has Heading Rate
+    LOCATION_NAV_DATA_HAS_PITCH_BIT       = (1<<4),  // Navigation data has Body pitch
+    // Navigation data has Forward Acceleration uncertainty
+    LOCATION_NAV_DATA_HAS_LONG_ACCEL_UNC_BIT = (1<<5),
+    // Navigation data has Sideward Acceleration uncertainty
+    LOCATION_NAV_DATA_HAS_LAT_ACCEL_UNC_BIT  = (1<<6),
+    // Navigation data has Vertical Acceleration uncertainty
+    LOCATION_NAV_DATA_HAS_VERT_ACCEL_UNC_BIT = (1<<7),
+    // Navigation data has Heading Rate uncertainty
+    LOCATION_NAV_DATA_HAS_YAW_RATE_UNC_BIT   = (1<<8),
+    // Navigation data has Body pitch uncertainty
+    LOCATION_NAV_DATA_HAS_PITCH_UNC_BIT      = (1<<9)
+} GnssLocationPosDataBits;
+
+typedef uint32_t GnssLocationPosDataMaskExt;
+typedef enum {
+    // Navigation data has pitch rate
+    LOCATION_NAV_DATA_HAS_PITCH_RATE_BIT     = (1<<0),
+    // Navigation data has body pitch rate uncertainty
+    LOCATION_NAV_DATA_HAS_PITCH_RATE_UNC_BIT = (1<<1),
+    // Navigation data has body roll
+    LOCATION_NAV_DATA_HAS_ROLL_BIT           = (1<<2),
+    // Navigation data has body roll uncertainty
+    LOCATION_NAV_DATA_HAS_ROLL_UNC_BIT       = (1<<3),
+    // Navigation data has body rate roll
+    LOCATION_NAV_DATA_HAS_ROLL_RATE_BIT      = (1<<4),
+    // Navigation data has body roll rate uncertainty
+    LOCATION_NAV_DATA_HAS_ROLL_RATE_UNC_BIT  = (1<<5),
+    // Navigation data has body yaw
+    LOCATION_NAV_DATA_HAS_YAW_BIT            = (1<<6),
+    // Navigation data has body roll uncertainty
+    LOCATION_NAV_DATA_HAS_YAW_UNC_BIT        = (1<<7)
+} GnssLocationPosDataBitsExt;
+
+typedef uint64_t GnssLocationInfoFlagMask;
+typedef enum {
+    GNSS_LOCATION_INFO_ALTITUDE_MEAN_SEA_LEVEL_BIT      = (1<<0),  // altitude mean sea level
+    GNSS_LOCATION_INFO_DOP_BIT                          = (1<<1),  // pdop, hdop, and vdop
+    GNSS_LOCATION_INFO_MAGNETIC_DEVIATION_BIT           = (1<<2),  // magnetic deviation
+    GNSS_LOCATION_INFO_HOR_RELIABILITY_BIT              = (1<<3),  // horizontal reliability
+    GNSS_LOCATION_INFO_VER_RELIABILITY_BIT              = (1<<4),  // vertical reliability
+    GNSS_LOCATION_INFO_HOR_ACCURACY_ELIP_SEMI_MAJOR_BIT = (1<<5),  // elipsode semi major
+    GNSS_LOCATION_INFO_HOR_ACCURACY_ELIP_SEMI_MINOR_BIT = (1<<6),  // elipsode semi minor
+    GNSS_LOCATION_INFO_HOR_ACCURACY_ELIP_AZIMUTH_BIT    = (1<<7),  // accuracy elipsode azimuth
+    GNSS_LOCATION_INFO_GNSS_SV_USED_DATA_BIT            = (1<<8),  // svUsedInPosition,
+                                                                   //       numOfMeasReceived
+                                                                   //       and measUsageInfo
+    GNSS_LOCATION_INFO_NAV_SOLUTION_MASK_BIT            = (1<<9),  // navSolutionMask
+    GNSS_LOCATION_INFO_SV_SOURCE_INFO_BIT               = (1<<10), // LocSvInfoSource
+    GNSS_LOCATION_INFO_POS_DYNAMICS_DATA_BIT            = (1<<11), // position dynamics data &
+                                                                   //       Position Dynamics Ext
+    GNSS_LOCATION_INFO_EXT_DOP_BIT                      = (1<<12), // gdop, tdop
+    GNSS_LOCATION_INFO_NORTH_STD_DEV_BIT                = (1<<13), // North standard deviation
+    GNSS_LOCATION_INFO_EAST_STD_DEV_BIT                 = (1<<14), // East standard deviation
+    GNSS_LOCATION_INFO_NORTH_VEL_BIT                    = (1<<15), // North Velocity
+    GNSS_LOCATION_INFO_EAST_VEL_BIT                     = (1<<16), // East Velocity
+    GNSS_LOCATION_INFO_UP_VEL_BIT                       = (1<<17), // Up Velocity
+    GNSS_LOCATION_INFO_NORTH_VEL_UNC_BIT                = (1<<18), // North Velocity Uncertainty
+    GNSS_LOCATION_INFO_EAST_VEL_UNC_BIT                 = (1<<19), // East Velocity Uncertainty
+    GNSS_LOCATION_INFO_UP_VEL_UNC_BIT                   = (1<<20), // Up Velocity Uncertainty
+    GNSS_LOCATION_INFO_LEAP_SECONDS_BIT                 = (1<<21), // leap seconds
+    GNSS_LOCATION_INFO_TIME_UNC_BIT                     = (1<<22), // time uncertainty
+    GNSS_LOCATION_INFO_NUM_SV_USED_IN_POSITION_BIT      = (1<<23), // number of SV used in position
+    GNSS_LOCATION_INFO_CALIBRATION_CONFIDENCE_BIT       = (1<<24), // sensor cal confidence
+    GNSS_LOCATION_INFO_CALIBRATION_STATUS_BIT           = (1<<25), // sensor cal status
+    GNSS_LOCATION_INFO_OUTPUT_ENG_TYPE_BIT              = (1<<26), // output engine type
+    GNSS_LOCATION_INFO_OUTPUT_ENG_MASK_BIT              = (1<<27), // output engine mask
+    GNSS_LOCATION_INFO_CONFORMITY_INDEX_BIT             = (1<<28), // conformity index
+    GNSS_LOCATION_INFO_LLA_VRP_BASED_BIT                = (1<<29), // VRP-based lat/long/alt
+    GNSS_LOCATION_INFO_ENU_VELOCITY_VRP_BASED_BIT       = (1<<30), // VRP-based east/north/up vel
+    GNSS_LOCATION_INFO_DR_SOLUTION_STATUS_MASK_BIT      = (1ULL<<31), // Valid DR solution status
+    GNSS_LOCATION_INFO_ALTITUDE_ASSUMED_BIT             = (1ULL<<32), // Valid altitude assumed
+    GNSS_LOCATION_INFO_SESSION_STATUS_BIT               = (1ULL<<33), // session status
+} GnssLocationInfoFlagBits;
+
+typedef enum {
+    GEOFENCE_BREACH_ENTER = 0,
+    GEOFENCE_BREACH_EXIT,
+    GEOFENCE_BREACH_DWELL_IN,
+    GEOFENCE_BREACH_DWELL_OUT,
+    GEOFENCE_BREACH_UNKNOWN,
+} GeofenceBreachType;
+
+typedef uint16_t GeofenceBreachTypeMask;
+typedef enum {
+    GEOFENCE_BREACH_ENTER_BIT     = (1<<0),
+    GEOFENCE_BREACH_EXIT_BIT      = (1<<1),
+    GEOFENCE_BREACH_DWELL_IN_BIT  = (1<<2),
+    GEOFENCE_BREACH_DWELL_OUT_BIT = (1<<3),
+} GeofenceBreachTypeBits;
+
+typedef enum {
+    GEOFENCE_STATUS_AVAILABILE_NO = 0,
+    GEOFENCE_STATUS_AVAILABILE_YES,
+} GeofenceStatusAvailable;
+
+// Set of masks for Modem and QWES capabilities.
+typedef uint64_t LocationCapabilitiesMask;
+typedef enum {
+    // supports startTracking API with minInterval param
+    LOCATION_CAPABILITIES_TIME_BASED_TRACKING_BIT           = (1<<0),
+    // supports startBatching API with minInterval param
+    LOCATION_CAPABILITIES_TIME_BASED_BATCHING_BIT           = (1<<1),
+    // supports startTracking API with minDistance param
+    LOCATION_CAPABILITIES_DISTANCE_BASED_TRACKING_BIT       = (1<<2),
+    // supports startBatching API with minDistance param
+    LOCATION_CAPABILITIES_DISTANCE_BASED_BATCHING_BIT       = (1<<3),
+    // supports addGeofences API
+    LOCATION_CAPABILITIES_GEOFENCE_BIT                      = (1<<4),
+    // supports GnssMeasurementsCallback
+    LOCATION_CAPABILITIES_GNSS_MEASUREMENTS_BIT             = (1<<5),
+    // supports startTracking/startBatching API with LocationOptions.mode of MSB (Ms Based)
+    LOCATION_CAPABILITIES_GNSS_MSB_BIT                      = (1<<6),
+    // supports startTracking/startBatching API with LocationOptions.mode of MSA (MS Assisted)
+    LOCATION_CAPABILITIES_GNSS_MSA_BIT                      = (1<<7),
+    // supports debug nmea sentences in the debugNmeaCallback
+    LOCATION_CAPABILITIES_DEBUG_NMEA_BIT                    = (1<<8),
+    // support outdoor trip batching
+    LOCATION_CAPABILITIES_OUTDOOR_TRIP_BATCHING_BIT         = (1<<9),
+    // support constellation enablement
+    LOCATION_CAPABILITIES_CONSTELLATION_ENABLEMENT_BIT      = (1<<10),
+    // support agpm
+    LOCATION_CAPABILITIES_AGPM_BIT                          = (1<<11),
+    // support location privacy
+    LOCATION_CAPABILITIES_PRIVACY_BIT                       = (1<<12),
+    // support measurement corrections
+    LOCATION_CAPABILITIES_MEASUREMENTS_CORRECTION_BIT       = (1<<13),
+    // support Robust Location
+    LOCATION_CAPABILITIES_CONFORMITY_INDEX_BIT               = (1<<14),
+    // support precise location edgnss
+    LOCATION_CAPABILITIES_EDGNSS_BIT                        = (1<<15),
+    // Modem supports Carrier Phase for Precise Positioning
+    // Measurement Engine (PPME).
+    LOCATION_CAPABILITIES_QWES_CARRIER_PHASE_BIT            = (1<<16),
+    // Modem supports SV Polynomial for tightly coupled external
+    // DR support. This is a Standalone Feature.
+    LOCATION_CAPABILITIES_QWES_SV_POLYNOMIAL_BIT            = (1<<17),
+    // Modem supports SV Ephemeris for tightly coupled external
+    // PPE engines. This is a Standalone Feature.
+    LOCATION_CAPABILITIES_QWES_SV_EPHEMERIS_BIT            = (1<<18),
+    // Modem supports GNSS Single Frequency feature. This is a
+    // Standalone Feature.
+    LOCATION_CAPABILITIES_QWES_GNSS_SINGLE_FREQUENCY        = (1<<19),
+    // Modem supports GNSS Multi Frequency feature. Multi Frequency
+    // enables Single frequency also.
+    LOCATION_CAPABILITIES_QWES_GNSS_MULTI_FREQUENCY         = (1<<20),
+    // This mask indicates VPe license bundle is enabled. VEPP
+    // bundle include Carrier Phase and SV Polynomial features.
+    LOCATION_CAPABILITIES_QWES_VPE                          = (1<<21),
+    // This mask indicates support for CV2X Location basic features.
+    // This bundle includes features for GTS Time & Freq, C-TUNC
+    // (Constrained Time uncertainity.
+    LOCATION_CAPABILITIES_QWES_CV2X_LOCATION_BASIC          = (1<<22),
+    // This mask indicates support for CV2X Location premium features.
+    // This bundle includes features for CV2X Location Basic features,
+    // QDR3 feature, and PACE. (Position Assisted Clock Estimator.
+    LOCATION_CAPABILITIES_QWES_CV2X_LOCATION_PREMIUM         = (1<<23),
+    // This mask indicates that PPE (Precise Positioning Engine)
+    // library is enabled or Precise Positioning Framework (PPF)
+    // is available. This bundle includes features for Carrier
+    // Phase and SV Ephermeris.
+    LOCATION_CAPABILITIES_QWES_PPE                          = (1<<24),
+    // This mask indicates QDR2_C license bundle is enabled. This
+    // bundle includes features for SV Polynomial.
+    LOCATION_CAPABILITIES_QWES_QDR2                         = (1<<25),
+    // This mask indicates QDR3_C license bundle is enabled. This
+    // bundle includes features for SV Polynomial.
+    LOCATION_CAPABILITIES_QWES_QDR3                         = (1<<26),
+} LocationCapabilitiesBits;
+
+typedef uint8_t LocationQwesFeatureType;
+typedef enum {
+    // Modem supports Carrier Phase for Precise Positioning
+    // Measurement Engine (PPME).
+    LOCATION_QWES_FEATURE_TYPE_CARRIER_PHASE                 = 1,
+    // Modem supports SV Polynomial for tightly coupled external
+    // DR support. This is a Standalone Feature.
+    LOCATION_QWES_FEATURE_TYPE_SV_POLYNOMIAL,
+    // Modem supports SV Ephemeris for tightly coupled external
+    // PPE support. This is a Standalone Feature.
+    LOCATION_QWES_FEATURE_TYPE_SV_EPH,
+    // Modem supports GNSS Single Frequency feature. This is a
+    // Standalone Feature.
+    LOCATION_QWES_FEATURE_TYPE_GNSS_SINGLE_FREQUENCY,
+    // Modem supports GNSS Multi Frequency feature. Multi Frequency
+    // enables Single frequency also.
+    LOCATION_QWES_FEATURE_TYPE_GNSS_MULTI_FREQUENCY,
+    // This indicates Time and Frequency status.
+    LOCATION_QWES_FEATURE_TYPE_TIME_FREQUENCY,
+    // This indicates Time Uncertainty  status.
+    LOCATION_QWES_FEATURE_TYPE_TIME_UNCERTAINTY,
+    // This indicates Clock Estimate status.
+    LOCATION_QWES_FEATURE_TYPE_CLOCK_ESTIMATE,
+    // This mask indicates that PPE (Precise Positioning Engine)
+    // library is enabled or Precise Positioning Framework (PPF)
+    // is available. This bundle includes features for Carrier
+    // Phase and SV Ephermeris.
+    LOCATION_QWES_FEATURE_TYPE_PPE,
+    // This indicates QDR2_C license bundle is enabled. This
+    // bundle includes features for SV Polynomial.
+    LOCATION_QWES_FEATURE_TYPE_QDR2,
+    // This indicates QDR3_C license bundle is enabled. This
+    // bundle includes features for SV Polynomial.
+    LOCATION_QWES_FEATURE_TYPE_QDR3,
+    // This indicates VEPP license bundle is enabled. VEPP
+    // bundle include Carrier Phase and SV Polynomial features.
+    LOCATION_QWES_FEATURE_TYPE_VPE,
+    // Max value
+    LOCATION_QWES_FEATURE_TYPE_MAX
+} LocationQwesFeatureTypes;
+
+typedef enum {
+    LOCATION_TECHNOLOGY_TYPE_GNSS = 0,
+} LocationTechnologyType;
+
+// Configures how GPS is locked when GPS is disabled (through GnssDisable)
+enum {
+    GNSS_CONFIG_GPS_LOCK_NONE = 0, // gps is not locked when GPS is disabled (GnssDisable)
+    GNSS_CONFIG_GPS_LOCK_MO,       // gps mobile originated (MO) is locked when GPS is disabled
+    GNSS_CONFIG_GPS_LOCK_NI,       // gps network initiated (NI) is locked when GPS is disabled
+    GNSS_CONFIG_GPS_LOCK_MO_AND_NI,// gps MO and NI is locked when GPS is disabled
+};
+typedef int32_t GnssConfigGpsLock;
+
+// SUPL version
+typedef enum {
+    GNSS_CONFIG_SUPL_VERSION_1_0_0 = 1,
+    GNSS_CONFIG_SUPL_VERSION_2_0_0,
+    GNSS_CONFIG_SUPL_VERSION_2_0_2,
+    GNSS_CONFIG_SUPL_VERSION_2_0_4,
+} GnssConfigSuplVersion;
+
+// LTE Positioning Profile
+typedef uint16_t GnssConfigLppProfileMask;
+typedef enum {
+    GNSS_CONFIG_LPP_PROFILE_RRLP_ON_LTE = 0,                         // RRLP on LTE (Default)
+    GNSS_CONFIG_LPP_PROFILE_USER_PLANE_BIT                 = (1<<0), // LPP User Plane (UP) on LTE
+    GNSS_CONFIG_LPP_PROFILE_CONTROL_PLANE_BIT              = (1<<1), // LPP_Control_Plane (CP)
+    GNSS_CONFIG_LPP_PROFILE_USER_PLANE_OVER_NR5G_SA_BIT    = (1<<2), // LPP User Plane (UP) on LTE
+    GNSS_CONFIG_LPP_PROFILE_CONTROL_PLANE_OVER_NR5G_SA_BIT = (1<<3), // LPP_Control_Plane (CP)
+} GnssConfigLppProfileBits;
+
+// Technology for LPPe Control Plane
+typedef uint16_t GnssConfigLppeControlPlaneMask;
+typedef enum {
+    GNSS_CONFIG_LPPE_CONTROL_PLANE_DBH_BIT                  = (1<<0), // DBH
+    GNSS_CONFIG_LPPE_CONTROL_PLANE_WLAN_AP_MEASUREMENTS_BIT = (1<<1), // WLAN_AP_MEASUREMENTS
+    GNSS_CONFIG_LPPE_CONTROL_PLANE_SRN_AP_MEASUREMENTS_BIT = (1<<2), // SRN_AP_MEASUREMENTS
+    GNSS_CONFIG_LPPE_CONTROL_PLANE_SENSOR_BARO_MEASUREMENTS_BIT = (1<<3),
+                                                             // SENSOR_BARO_MEASUREMENTS
+} GnssConfigLppeControlPlaneBits;
+
+// Technology for LPPe User Plane
+typedef uint16_t GnssConfigLppeUserPlaneMask;
+typedef enum {
+    GNSS_CONFIG_LPPE_USER_PLANE_DBH_BIT                  = (1<<0), // DBH
+    GNSS_CONFIG_LPPE_USER_PLANE_WLAN_AP_MEASUREMENTS_BIT = (1<<1), // WLAN_AP_MEASUREMENTS
+    GNSS_CONFIG_LPPE_USER_PLANE_SRN_AP_MEASUREMENTS_BIT = (1<<2), // SRN_AP_MEASUREMENTS
+    GNSS_CONFIG_LPPE_USER_PLANE_SENSOR_BARO_MEASUREMENTS_BIT = (1<<3),
+                                                            // SENSOR_BARO_MEASUREMENTS
+} GnssConfigLppeUserPlaneBits;
+
+// Positioning Protocol on A-GLONASS system
+typedef uint16_t GnssConfigAGlonassPositionProtocolMask;
+typedef enum {
+    GNSS_CONFIG_RRC_CONTROL_PLANE_BIT = (1<<0),  // RRC Control Plane
+    GNSS_CONFIG_RRLP_USER_PLANE_BIT   = (1<<1),  // RRLP User Plane
+    GNSS_CONFIG_LLP_USER_PLANE_BIT    = (1<<2),  // LPP User Plane
+    GNSS_CONFIG_LLP_CONTROL_PLANE_BIT = (1<<3),  // LPP Control Plane
+} GnssConfigAGlonassPositionProtocolBits;
+
+typedef enum {
+    GNSS_CONFIG_EMERGENCY_PDN_FOR_EMERGENCY_SUPL_NO = 0,
+    GNSS_CONFIG_EMERGENCY_PDN_FOR_EMERGENCY_SUPL_YES,
+} GnssConfigEmergencyPdnForEmergencySupl;
+
+typedef enum {
+    GNSS_CONFIG_SUPL_EMERGENCY_SERVICES_NO = 0,
+    GNSS_CONFIG_SUPL_EMERGENCY_SERVICES_YES,
+} GnssConfigSuplEmergencyServices;
+
+typedef uint16_t GnssConfigSuplModeMask;
+typedef enum {
+    GNSS_CONFIG_SUPL_MODE_MSB_BIT = (1<<0),
+    GNSS_CONFIG_SUPL_MODE_MSA_BIT = (1<<1),
+} GnssConfigSuplModeBits;
+
+typedef uint32_t GnssConfigFlagsMask;
+typedef enum {
+    GNSS_CONFIG_FLAGS_GPS_LOCK_VALID_BIT                   = (1<<0),
+    GNSS_CONFIG_FLAGS_SUPL_VERSION_VALID_BIT               = (1<<1),
+    GNSS_CONFIG_FLAGS_SET_ASSISTANCE_DATA_VALID_BIT        = (1<<2),
+    GNSS_CONFIG_FLAGS_LPP_PROFILE_VALID_BIT                = (1<<3),
+    GNSS_CONFIG_FLAGS_LPPE_CONTROL_PLANE_VALID_BIT         = (1<<4),
+    GNSS_CONFIG_FLAGS_LPPE_USER_PLANE_VALID_BIT            = (1<<5),
+    GNSS_CONFIG_FLAGS_AGLONASS_POSITION_PROTOCOL_VALID_BIT = (1<<6),
+    GNSS_CONFIG_FLAGS_EM_PDN_FOR_EM_SUPL_VALID_BIT         = (1<<7),
+    GNSS_CONFIG_FLAGS_SUPL_EM_SERVICES_BIT                 = (1<<8),
+    GNSS_CONFIG_FLAGS_SUPL_MODE_BIT                        = (1<<9),
+    GNSS_CONFIG_FLAGS_BLACKLISTED_SV_IDS_BIT               = (1<<10),
+    GNSS_CONFIG_FLAGS_EMERGENCY_EXTENSION_SECONDS_BIT      = (1<<11),
+    GNSS_CONFIG_FLAGS_ROBUST_LOCATION_BIT                  = (1<<12),
+    GNSS_CONFIG_FLAGS_MIN_GPS_WEEK_BIT                     = (1<<13),
+    GNSS_CONFIG_FLAGS_MIN_SV_ELEVATION_BIT                 = (1<<14),
+    GNSS_CONFIG_FLAGS_CONSTELLATION_SECONDARY_BAND_BIT     = (1<<15),
+} GnssConfigFlagsBits;
+
+typedef enum {
+    GNSS_NI_ENCODING_TYPE_NONE = 0,
+    GNSS_NI_ENCODING_TYPE_GSM_DEFAULT,
+    GNSS_NI_ENCODING_TYPE_UTF8,
+    GNSS_NI_ENCODING_TYPE_UCS2,
+} GnssNiEncodingType;
+
+typedef enum {
+    GNSS_NI_TYPE_VOICE = 0,
+    GNSS_NI_TYPE_SUPL,
+    GNSS_NI_TYPE_CONTROL_PLANE,
+    GNSS_NI_TYPE_EMERGENCY_SUPL
+} GnssNiType;
+
+typedef uint16_t GnssNiOptionsMask;
+typedef enum {
+    GNSS_NI_OPTIONS_NOTIFICATION_BIT     = (1<<0),
+    GNSS_NI_OPTIONS_VERIFICATION_BIT     = (1<<1),
+    GNSS_NI_OPTIONS_PRIVACY_OVERRIDE_BIT = (1<<2),
+} GnssNiOptionsBits;
+
+typedef enum {
+    GNSS_NI_RESPONSE_ACCEPT = 1,
+    GNSS_NI_RESPONSE_DENY,
+    GNSS_NI_RESPONSE_NO_RESPONSE,
+    GNSS_NI_RESPONSE_IGNORE,
+} GnssNiResponse;
+
+typedef enum {
+    GNSS_SV_TYPE_UNKNOWN = 0,
+    GNSS_SV_TYPE_GPS,
+    GNSS_SV_TYPE_SBAS,
+    GNSS_SV_TYPE_GLONASS,
+    GNSS_SV_TYPE_QZSS,
+    GNSS_SV_TYPE_BEIDOU,
+    GNSS_SV_TYPE_GALILEO,
+    GNSS_SV_TYPE_NAVIC,
+} GnssSvType;
+
+typedef enum {
+    GNSS_EPH_TYPE_UNKNOWN = 0,
+    GNSS_EPH_TYPE_EPHEMERIS,
+    GNSS_EPH_TYPE_ALMANAC,
+} GnssEphemerisType;
+
+typedef enum {
+    GNSS_EPH_SOURCE_UNKNOWN = 0,
+    GNSS_EPH_SOURCE_DEMODULATED,
+    GNSS_EPH_SOURCE_SUPL_PROVIDED,
+    GNSS_EPH_SOURCE_OTHER_SERVER_PROVIDED,
+    GNSS_EPH_SOURCE_LOCAL,
+} GnssEphemerisSource;
+
+typedef enum {
+    GNSS_EPH_HEALTH_UNKNOWN = 0,
+    GNSS_EPH_HEALTH_GOOD,
+    GNSS_EPH_HEALTH_BAD,
+} GnssEphemerisHealth;
+
+typedef uint16_t GnssSvOptionsMask;
+typedef enum {
+    GNSS_SV_OPTIONS_HAS_EPHEMER_BIT             = (1<<0),
+    GNSS_SV_OPTIONS_HAS_ALMANAC_BIT             = (1<<1),
+    GNSS_SV_OPTIONS_USED_IN_FIX_BIT             = (1<<2),
+    GNSS_SV_OPTIONS_HAS_CARRIER_FREQUENCY_BIT   = (1<<3),
+    GNSS_SV_OPTIONS_HAS_GNSS_SIGNAL_TYPE_BIT    = (1<<4)
+} GnssSvOptionsBits;
+
+typedef enum {
+    GNSS_ASSISTANCE_TYPE_SUPL = 0,
+    GNSS_ASSISTANCE_TYPE_C2K,
+    GNSS_ASSISTANCE_TYPE_SUPL_EIMS,
+    GNSS_ASSISTANCE_TYPE_SUPL_IMS,
+} GnssAssistanceType;
+
+typedef enum {
+    GNSS_SUPL_MODE_STANDALONE = 0,
+    GNSS_SUPL_MODE_MSB,
+    GNSS_SUPL_MODE_MSA,
+} GnssSuplMode;
+
+typedef enum {
+    BATCHING_MODE_ROUTINE = 0,   // positions are reported when batched positions memory is full
+    BATCHING_MODE_TRIP,          // positions are reported when a certain distance is covered
+    BATCHING_MODE_NO_AUTO_REPORT // no report of positions automatically, instead queried on demand
+} BatchingMode;
+
+typedef enum {
+    BATCHING_STATUS_TRIP_COMPLETED = 0,
+    BATCHING_STATUS_POSITION_AVAILABE,
+    BATCHING_STATUS_POSITION_UNAVAILABLE
+} BatchingStatus;
+
+typedef uint16_t GnssMeasurementsAdrStateMask;
+typedef enum {
+    GNSS_MEASUREMENTS_ACCUMULATED_DELTA_RANGE_STATE_UNKNOWN                 = 0,
+    GNSS_MEASUREMENTS_ACCUMULATED_DELTA_RANGE_STATE_VALID_BIT               = (1<<0),
+    GNSS_MEASUREMENTS_ACCUMULATED_DELTA_RANGE_STATE_RESET_BIT               = (1<<1),
+    GNSS_MEASUREMENTS_ACCUMULATED_DELTA_RANGE_STATE_CYCLE_SLIP_BIT          = (1<<2),
+    GNSS_MEASUREMENTS_ACCUMULATED_DELTA_RANGE_STATE_HALF_CYCLE_RESOLVED_BIT = (1<<3),
+} GnssMeasurementsAdrStateBits;
+
+typedef enum {
+    GNSS_MEASUREMENTS_CODE_TYPE_A       = 0,
+    GNSS_MEASUREMENTS_CODE_TYPE_B       = 1,
+    GNSS_MEASUREMENTS_CODE_TYPE_C       = 2,
+    GNSS_MEASUREMENTS_CODE_TYPE_I       = 3,
+    GNSS_MEASUREMENTS_CODE_TYPE_L       = 4,
+    GNSS_MEASUREMENTS_CODE_TYPE_M       = 5,
+    GNSS_MEASUREMENTS_CODE_TYPE_P       = 6,
+    GNSS_MEASUREMENTS_CODE_TYPE_Q       = 7,
+    GNSS_MEASUREMENTS_CODE_TYPE_S       = 8,
+    GNSS_MEASUREMENTS_CODE_TYPE_W       = 9,
+    GNSS_MEASUREMENTS_CODE_TYPE_X       = 10,
+    GNSS_MEASUREMENTS_CODE_TYPE_Y       = 11,
+    GNSS_MEASUREMENTS_CODE_TYPE_Z       = 12,
+    GNSS_MEASUREMENTS_CODE_TYPE_N       = 13,
+    GNSS_MEASUREMENTS_CODE_TYPE_OTHER   = 255,
+} GnssMeasurementsCodeType;
+
+typedef uint32_t GnssMeasurementsDataFlagsMask;
+typedef enum {
+    GNSS_MEASUREMENTS_DATA_SV_ID_BIT                        = (1<<0),
+    GNSS_MEASUREMENTS_DATA_SV_TYPE_BIT                      = (1<<1),
+    GNSS_MEASUREMENTS_DATA_STATE_BIT                        = (1<<2),
+    GNSS_MEASUREMENTS_DATA_RECEIVED_SV_TIME_BIT             = (1<<3),
+    GNSS_MEASUREMENTS_DATA_RECEIVED_SV_TIME_UNCERTAINTY_BIT = (1<<4),
+    GNSS_MEASUREMENTS_DATA_CARRIER_TO_NOISE_BIT             = (1<<5),
+    GNSS_MEASUREMENTS_DATA_PSEUDORANGE_RATE_BIT             = (1<<6),
+    GNSS_MEASUREMENTS_DATA_PSEUDORANGE_RATE_UNCERTAINTY_BIT = (1<<7),
+    GNSS_MEASUREMENTS_DATA_ADR_STATE_BIT                    = (1<<8),
+    GNSS_MEASUREMENTS_DATA_ADR_BIT                          = (1<<9),
+    GNSS_MEASUREMENTS_DATA_ADR_UNCERTAINTY_BIT              = (1<<10),
+    GNSS_MEASUREMENTS_DATA_CARRIER_FREQUENCY_BIT            = (1<<11),
+    GNSS_MEASUREMENTS_DATA_CARRIER_CYCLES_BIT               = (1<<12),
+    GNSS_MEASUREMENTS_DATA_CARRIER_PHASE_BIT                = (1<<13),
+    GNSS_MEASUREMENTS_DATA_CARRIER_PHASE_UNCERTAINTY_BIT    = (1<<14),
+    GNSS_MEASUREMENTS_DATA_MULTIPATH_INDICATOR_BIT          = (1<<15),
+    GNSS_MEASUREMENTS_DATA_SIGNAL_TO_NOISE_RATIO_BIT        = (1<<16),
+    GNSS_MEASUREMENTS_DATA_AUTOMATIC_GAIN_CONTROL_BIT       = (1<<17),
+    GNSS_MEASUREMENTS_DATA_FULL_ISB_BIT                     = (1<<18),
+    GNSS_MEASUREMENTS_DATA_FULL_ISB_UNCERTAINTY_BIT         = (1<<19),
+    GNSS_MEASUREMENTS_DATA_SATELLITE_ISB_BIT                = (1<<20),
+    GNSS_MEASUREMENTS_DATA_SATELLITE_ISB_UNCERTAINTY_BIT    = (1<<21),
+    GNSS_MEASUREMENTS_DATA_CYCLE_SLIP_COUNT_BIT             = (1<<22),
+} GnssMeasurementsDataFlagsBits;
+
+typedef uint32_t GnssMeasurementsStateMask;
+typedef enum {
+    GNSS_MEASUREMENTS_STATE_UNKNOWN_BIT               = 0,
+    GNSS_MEASUREMENTS_STATE_CODE_LOCK_BIT             = (1<<0),
+    GNSS_MEASUREMENTS_STATE_BIT_SYNC_BIT              = (1<<1),
+    GNSS_MEASUREMENTS_STATE_SUBFRAME_SYNC_BIT         = (1<<2),
+    GNSS_MEASUREMENTS_STATE_TOW_DECODED_BIT           = (1<<3),
+    GNSS_MEASUREMENTS_STATE_MSEC_AMBIGUOUS_BIT        = (1<<4),
+    GNSS_MEASUREMENTS_STATE_SYMBOL_SYNC_BIT           = (1<<5),
+    GNSS_MEASUREMENTS_STATE_GLO_STRING_SYNC_BIT       = (1<<6),
+    GNSS_MEASUREMENTS_STATE_GLO_TOD_DECODED_BIT       = (1<<7),
+    GNSS_MEASUREMENTS_STATE_BDS_D2_BIT_SYNC_BIT       = (1<<8),
+    GNSS_MEASUREMENTS_STATE_BDS_D2_SUBFRAME_SYNC_BIT  = (1<<9),
+    GNSS_MEASUREMENTS_STATE_GAL_E1BC_CODE_LOCK_BIT    = (1<<10),
+    GNSS_MEASUREMENTS_STATE_GAL_E1C_2ND_CODE_LOCK_BIT = (1<<11),
+    GNSS_MEASUREMENTS_STATE_GAL_E1B_PAGE_SYNC_BIT     = (1<<12),
+    GNSS_MEASUREMENTS_STATE_SBAS_SYNC_BIT             = (1<<13),
+    GNSS_MEASUREMENTS_STATE_TOW_KNOWN_BIT             = (1<<14),
+    GNSS_MEASUREMENTS_STATE_GLO_TOD_KNOWN_BIT         = (1<<15),
+    GNSS_MEASUREMENTS_STATE_2ND_CODE_LOCK_BIT         = (1<<16),
+} GnssMeasurementsStateBits;
+
+typedef uint16_t GnssSingleSatCorrectionMask;
+typedef enum {
+    GNSS_MEAS_CORR_UNKNOWN_BIT                     = 0,
+    GNSS_MEAS_CORR_HAS_SAT_IS_LOS_PROBABILITY_BIT  = (1 << 0),
+    GNSS_MEAS_CORR_HAS_EXCESS_PATH_LENGTH_BIT      = (1 << 1),
+    GNSS_MEAS_CORR_HAS_EXCESS_PATH_LENGTH_UNC_BIT  = (1 << 2),
+    GNSS_MEAS_CORR_HAS_REFLECTING_PLANE_BIT        = (1 << 3),
+} GnssSingleSatCorrectionBits;
+
+typedef enum {
+    GNSS_MEASUREMENTS_MULTIPATH_INDICATOR_UNKNOWN = 0,
+    GNSS_MEASUREMENTS_MULTIPATH_INDICATOR_PRESENT,
+    GNSS_MEASUREMENTS_MULTIPATH_INDICATOR_NOT_PRESENT,
+} GnssMeasurementsMultipathIndicator;
+
+typedef uint32_t GnssMeasurementsClockFlagsMask;
+typedef enum {
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_LEAP_SECOND_BIT                  = (1<<0),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_TIME_BIT                         = (1<<1),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_TIME_UNCERTAINTY_BIT             = (1<<2),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_FULL_BIAS_BIT                    = (1<<3),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_BIAS_BIT                         = (1<<4),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_BIAS_UNCERTAINTY_BIT             = (1<<5),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_DRIFT_BIT                        = (1<<6),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_DRIFT_UNCERTAINTY_BIT            = (1<<7),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_HW_CLOCK_DISCONTINUITY_COUNT_BIT = (1<<8),
+    GNSS_MEASUREMENTS_CLOCK_FLAGS_ELAPSED_REAL_TIME_BIT            = (1<<9),
+} GnssMeasurementsClockFlagsBits;
+
+typedef uint32_t GnssAidingDataSvMask;
+typedef enum {
+    GNSS_AIDING_DATA_SV_EPHEMERIS_BIT    = (1<<0), // ephemeris
+    GNSS_AIDING_DATA_SV_ALMANAC_BIT      = (1<<1), // almanac
+    GNSS_AIDING_DATA_SV_HEALTH_BIT       = (1<<2), // health
+    GNSS_AIDING_DATA_SV_DIRECTION_BIT    = (1<<3), // direction
+    GNSS_AIDING_DATA_SV_STEER_BIT        = (1<<4), // steer
+    GNSS_AIDING_DATA_SV_ALMANAC_CORR_BIT = (1<<5), // almanac correction
+    GNSS_AIDING_DATA_SV_BLACKLIST_BIT    = (1<<6), // blacklist SVs
+    GNSS_AIDING_DATA_SV_SA_DATA_BIT      = (1<<7), // sensitivity assistance data
+    GNSS_AIDING_DATA_SV_NO_EXIST_BIT     = (1<<8), // SV does not exist
+    GNSS_AIDING_DATA_SV_IONOSPHERE_BIT   = (1<<9), // ionosphere correction
+    GNSS_AIDING_DATA_SV_TIME_BIT         = (1<<10),// reset satellite time
+    GNSS_AIDING_DATA_SV_MB_DATA          = (1<<11),// delete multiband data
+    GNSS_AIDING_DATA_SV_POLY_BIT         = (1<<12),// poly
+} GnssAidingDataSvBits;
+
+typedef uint32_t GnssAidingDataSvTypeMask;
+typedef enum {
+    GNSS_AIDING_DATA_SV_TYPE_GPS_BIT      = (1<<0),
+    GNSS_AIDING_DATA_SV_TYPE_GLONASS_BIT  = (1<<1),
+    GNSS_AIDING_DATA_SV_TYPE_QZSS_BIT     = (1<<2),
+    GNSS_AIDING_DATA_SV_TYPE_BEIDOU_BIT   = (1<<3),
+    GNSS_AIDING_DATA_SV_TYPE_GALILEO_BIT  = (1<<4),
+    GNSS_AIDING_DATA_SV_TYPE_NAVIC_BIT    = (1<<5),
+    GNSS_AIDING_DATA_SV_TYPE_MAX          = (1<<6),
+} GnssAidingDataSvTypeBits;
+#define GNSS_AIDING_DATA_SV_TYPE_MASK_ALL (GNSS_AIDING_DATA_SV_TYPE_MAX-1)
+
+/* Gnss constellation type mask */
+typedef uint16_t GnssConstellationTypeMask;
+typedef enum {
+    GNSS_CONSTELLATION_TYPE_GPS_BIT      = (1<<0),
+    GNSS_CONSTELLATION_TYPE_GLONASS_BIT  = (1<<1),
+    GNSS_CONSTELLATION_TYPE_QZSS_BIT     = (1<<2),
+    GNSS_CONSTELLATION_TYPE_BEIDOU_BIT   = (1<<3),
+    GNSS_CONSTELLATION_TYPE_GALILEO_BIT  = (1<<4),
+    GNSS_CONSTELLATION_TYPE_SBAS_BIT     = (1<<5),
+    GNSS_CONSTELLATION_TYPE_NAVIC_BIT    = (1<<6),
+} GnssConstellationTypeBits;
+
+#define GNSS_CONSTELLATION_TYPE_MASK_ALL\
+        (GNSS_CONSTELLATION_TYPE_GPS_BIT     | GNSS_CONSTELLATION_TYPE_GLONASS_BIT |\
+         GNSS_CONSTELLATION_TYPE_QZSS_BIT    | GNSS_CONSTELLATION_TYPE_BEIDOU_BIT  |\
+         GNSS_CONSTELLATION_TYPE_GALILEO_BIT | GNSS_CONSTELLATION_TYPE_SBAS_BIT    |\
+         GNSS_CONSTELLATION_TYPE_NAVIC_BIT)
+
+/** GNSS Signal Type and RF Band */
+typedef uint32_t GnssSignalTypeMask;
+typedef enum {
+    /** GPS L1CA Signal */
+    GNSS_SIGNAL_GPS_L1CA            = (1<<0),
+    /** GPS L1C Signal */
+    GNSS_SIGNAL_GPS_L1C             = (1<<1),
+    /** GPS L2 RF Band */
+    GNSS_SIGNAL_GPS_L2              = (1<<2),
+    /** GPS L5 RF Band */
+    GNSS_SIGNAL_GPS_L5              = (1<<3),
+    /** GLONASS G1 (L1OF) RF Band */
+    GNSS_SIGNAL_GLONASS_G1          = (1<<4),
+    /** GLONASS G2 (L2OF) RF Band */
+    GNSS_SIGNAL_GLONASS_G2          = (1<<5),
+    /** GALILEO E1 RF Band */
+    GNSS_SIGNAL_GALILEO_E1          = (1<<6),
+    /** GALILEO E5A RF Band */
+    GNSS_SIGNAL_GALILEO_E5A         = (1<<7),
+    /** GALILEO E5B RF Band */
+    GNSS_SIGNAL_GALILEO_E5B         = (1<<8),
+    /** BEIDOU B1 RF Band */
+    GNSS_SIGNAL_BEIDOU_B1           = (1<<9),
+    /** BEIDOU B2 RF Band */
+    GNSS_SIGNAL_BEIDOU_B2           = (1<<10),
+    /** QZSS L1CA RF Band */
+    GNSS_SIGNAL_QZSS_L1CA           = (1<<11),
+    /** QZSS L1S RF Band */
+    GNSS_SIGNAL_QZSS_L1S            = (1<<12),
+    /** QZSS L2 RF Band */
+    GNSS_SIGNAL_QZSS_L2             = (1<<13),
+    /** QZSS L5 RF Band */
+    GNSS_SIGNAL_QZSS_L5             = (1<<14),
+    /** SBAS L1 RF Band */
+    GNSS_SIGNAL_SBAS_L1             = (1<<15),
+    /** BEIDOU B1I RF Band */
+    GNSS_SIGNAL_BEIDOU_B1I          = (1<<16),
+    /** BEIDOU B1C RF Band */
+    GNSS_SIGNAL_BEIDOU_B1C          = (1<<17),
+    /** BEIDOU B2I RF Band */
+    GNSS_SIGNAL_BEIDOU_B2I          = (1<<18),
+    /** BEIDOU B2AI RF Band */
+    GNSS_SIGNAL_BEIDOU_B2AI         = (1<<19),
+    /** NAVIC L5 RF Band */
+    GNSS_SIGNAL_NAVIC_L5            = (1<<20),
+    /** BEIDOU B2A_Q RF Band */
+    GNSS_SIGNAL_BEIDOU_B2AQ         = (1<<21),
+} GnssSignalTypeBits;
+
+#define GNSS_SIGNAL_TYPE_MASK_ALL\
+    (GNSS_SIGNAL_GPS_L1CA | GNSS_SIGNAL_GPS_L1C | GNSS_SIGNAL_GPS_L2 |\
+     GNSS_SIGNAL_GPS_L5| GNSS_SIGNAL_GLONASS_G1 | GNSS_SIGNAL_GLONASS_G2 |\
+     GNSS_SIGNAL_GALILEO_E1 | GNSS_SIGNAL_GALILEO_E5A | GNSS_SIGNAL_GALILEO_E5B |\
+     GNSS_SIGNAL_BEIDOU_B1I | GNSS_SIGNAL_BEIDOU_B1C | GNSS_SIGNAL_BEIDOU_B2I|\
+     GNSS_SIGNAL_BEIDOU_B2AI | GNSS_SIGNAL_QZSS_L1CA | GNSS_SIGNAL_QZSS_L1S |\
+     GNSS_SIGNAL_QZSS_L2| GNSS_SIGNAL_QZSS_L5 | GNSS_SIGNAL_SBAS_L1 |\
+     GNSS_SIGNAL_NAVIC_L5 | GNSS_SIGNAL_BEIDOU_B2AQ)
+
+typedef enum
+{
+    GNSS_LOC_SV_SYSTEM_UNKNOWN                = 0,
+    /** unknown sv system. */
+    GNSS_LOC_SV_SYSTEM_MIN                    = 1,
+    /**< Min enum of valid SV system. */
+    GNSS_LOC_SV_SYSTEM_GPS                    = 1,
+    /**< GPS satellite. */
+    GNSS_LOC_SV_SYSTEM_GALILEO                = 2,
+    /**< GALILEO satellite. */
+    GNSS_LOC_SV_SYSTEM_SBAS                   = 3,
+    /**< SBAS satellite. */
+    GNSS_LOC_SV_SYSTEM_GLONASS                = 4,
+    /**< GLONASS satellite. */
+    GNSS_LOC_SV_SYSTEM_BDS                    = 5,
+    /**< BDS satellite. */
+    GNSS_LOC_SV_SYSTEM_QZSS                   = 6,
+    /**< QZSS satellite. */
+    GNSS_LOC_SV_SYSTEM_NAVIC                  = 7,
+    /**< NAVIC satellite. */
+    GNSS_LOC_SV_SYSTEM_MAX                    = 7,
+    /**< Max enum of valid SV system. */
+} Gnss_LocSvSystemEnumType;
+
+typedef enum {
+    GNSS_LOC_SIGNAL_TYPE_GPS_L1CA = 0,          /**<  GPS L1CA Signal  */
+    GNSS_LOC_SIGNAL_TYPE_GPS_L1C = 1,           /**<  GPS L1C Signal  */
+    GNSS_LOC_SIGNAL_TYPE_GPS_L2C_L = 2,         /**<  GPS L2C_L RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_GPS_L5_Q = 3,          /**<  GPS L5_Q RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_GLONASS_G1 = 4,        /**<  GLONASS G1 (L1OF) RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_GLONASS_G2 = 5,        /**<  GLONASS G2 (L2OF) RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_GALILEO_E1_C = 6,      /**<  GALILEO E1_C RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_GALILEO_E5A_Q = 7,     /**<  GALILEO E5A_Q RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_GALILEO_E5B_Q = 8,     /**<  GALILEO E5B_Q RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_BEIDOU_B1_I = 9,       /**<  BEIDOU B1_I RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_BEIDOU_B1C = 10,       /**<  BEIDOU B1C RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_BEIDOU_B2_I = 11,      /**<  BEIDOU B2_I RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_BEIDOU_B2A_I = 12,     /**<  BEIDOU B2A_I RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_QZSS_L1CA = 13,        /**<  QZSS L1CA RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_QZSS_L1S = 14,         /**<  QZSS L1S RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_QZSS_L2C_L = 15,       /**<  QZSS L2C_L RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_QZSS_L5_Q = 16,        /**<  QZSS L5_Q RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_SBAS_L1_CA = 17,       /**<  SBAS L1_CA RF Band  */
+    GNSS_LOC_SIGNAL_TYPE_NAVIC_L5 = 18,         /**<  NAVIC L5 RF Band */
+    GNSS_LOC_SIGNAL_TYPE_BEIDOU_B2A_Q = 19,     /**<  BEIDOU B2A_Q RF Band  */
+    GNSS_LOC_MAX_NUMBER_OF_SIGNAL_TYPES = 20    /**<  Maximum number of signal types */
+} Gnss_LocSignalEnumType;
+
+typedef uint32_t PositioningEngineMask;
+typedef enum {
+    STANDARD_POSITIONING_ENGINE = (1 << 0),
+    DEAD_RECKONING_ENGINE       = (1 << 1),
+    PRECISE_POSITIONING_ENGINE  = (1 << 2),
+    VP_POSITIONING_ENGINE  = (1 << 3)
+} PositioningEngineBits;
+#define POSITION_ENGINE_MASK_ALL \
+        (STANDARD_POSITIONING_ENGINE|DEAD_RECKONING_ENGINE| \
+        PRECISE_POSITIONING_ENGINE|VP_POSITIONING_ENGINE)
+
+/** Specify the position engine running state. <br/> */
+enum LocEngineRunState {
+    /** Request the position engine to be put into resume state.
+     *  <br/> */
+    LOC_ENGINE_RUN_STATE_PAUSE   = 1,
+    /** Request the position engine to be put into resume state.
+     *  <br/> */
+    LOC_ENGINE_RUN_STATE_RESUME   = 2,
+};
+
+typedef uint64_t GnssDataMask;
+typedef enum {
+    // Jammer Indicator is available
+    GNSS_LOC_DATA_JAMMER_IND_BIT = (1ULL << 0),
+    // AGC is available
+    GNSS_LOC_DATA_AGC_BIT = (1ULL << 1)
+} GnssDataBits;
+
+typedef uint32_t GnssSystemTimeStructTypeFlags;
+typedef enum {
+    GNSS_SYSTEM_TIME_WEEK_VALID             = (1 << 0),
+    GNSS_SYSTEM_TIME_WEEK_MS_VALID          = (1 << 1),
+    GNSS_SYSTEM_CLK_TIME_BIAS_VALID         = (1 << 2),
+    GNSS_SYSTEM_CLK_TIME_BIAS_UNC_VALID     = (1 << 3),
+    GNSS_SYSTEM_REF_FCOUNT_VALID            = (1 << 4),
+    GNSS_SYSTEM_NUM_CLOCK_RESETS_VALID      = (1 << 5)
+} GnssSystemTimeTypeBits;
+
+typedef uint32_t GnssGloTimeStructTypeFlags;
+typedef enum {
+    GNSS_CLO_DAYS_VALID                     = (1 << 0),
+    GNSS_GLO_MSEC_VALID                     = (1 << 1),
+    GNSS_GLO_CLK_TIME_BIAS_VALID            = (1 << 2),
+    GNSS_GLO_CLK_TIME_BIAS_UNC_VALID        = (1 << 3),
+    GNSS_GLO_REF_FCOUNT_VALID               = (1 << 4),
+    GNSS_GLO_NUM_CLOCK_RESETS_VALID         = (1 << 5),
+    GNSS_GLO_FOUR_YEAR_VALID                = (1 << 6)
+} GnssGloTimeTypeBits;
+
+typedef struct {
+    GnssAidingDataSvMask svMask;         // bitwise OR of GnssAidingDataSvBits
+    GnssAidingDataSvTypeMask svTypeMask; // bitwise OR of GnssAidingDataSvTypeBits
+} GnssAidingDataSv;
+
+typedef uint32_t GnssAidingDataCommonMask;
+typedef enum {
+    GNSS_AIDING_DATA_COMMON_POSITION_BIT      = (1<<0), // position estimate
+    GNSS_AIDING_DATA_COMMON_TIME_BIT          = (1<<1), // reset all clock values
+    GNSS_AIDING_DATA_COMMON_UTC_BIT           = (1<<2), // UTC estimate
+    GNSS_AIDING_DATA_COMMON_RTI_BIT           = (1<<3), // RTI
+    GNSS_AIDING_DATA_COMMON_FREQ_BIAS_EST_BIT = (1<<4), // frequency bias estimate
+    GNSS_AIDING_DATA_COMMON_CELLDB_BIT        = (1<<5), // all celldb info
+} GnssAidingDataCommonBits;
+
+typedef struct {
+    GnssAidingDataCommonMask mask; // bitwise OR of GnssAidingDataCommonBits
+} GnssAidingDataCommon;
+
+typedef uint32_t DrEngineAidingDataMask;
+typedef enum {
+    DR_ENGINE_AIDING_DATA_CALIBRATION_BIT = (1<<0), // Calibration data for DRE engine
+} DrEngineAidingDataBits;
+
+typedef struct {
+    bool deleteAll;              // if true, delete all aiding data and ignore other params
+    GnssAidingDataSv sv;         // SV specific aiding data
+    GnssAidingDataCommon common; // common aiding data
+    DrEngineAidingDataMask dreAidingDataMask;// aiding data mask for dr engine
+    PositioningEngineMask posEngineMask;     // engines to perform the delete operation on.
+} GnssAidingData;
+
+typedef uint16_t DrCalibrationStatusMask;
+typedef enum {
+    // Indicate that roll calibration is needed. Need to take more turns on level ground
+    DR_ROLL_CALIBRATION_NEEDED  = (1<<0),
+    // Indicate that pitch calibration is needed. Need to take more turns on level ground
+    DR_PITCH_CALIBRATION_NEEDED = (1<<1),
+    // Indicate that yaw calibration is needed. Need to accelerate in a straight line
+    DR_YAW_CALIBRATION_NEEDED   = (1<<2),
+    // Indicate that odo calibration is needed. Need to accelerate in a straight line
+    DR_ODO_CALIBRATION_NEEDED   = (1<<3),
+    // Indicate that gyro calibration is needed. Need to take more turns on level ground
+    DR_GYRO_CALIBRATION_NEEDED  = (1<<4)
+} DrCalibrationStatusBits;
+
+typedef struct {
+    uint32_t size;           // set to sizeof(Location)
+    LocationFlagsMask flags; // bitwise OR of LocationFlagsBits to mark which params are valid
+    uint64_t timestamp;      // UTC timestamp for location fix, milliseconds since January 1, 1970
+    double latitude;         // in degrees
+    double longitude;        // in degrees
+    double altitude;         // in meters above the WGS 84 reference ellipsoid
+    float speed;             // in meters per second
+    float bearing;           // in degrees; range [0, 360)
+    float accuracy;          // in meters
+    float verticalAccuracy;  // in meters
+    float speedAccuracy;     // in meters/second
+    float bearingAccuracy;   // in degrees (0 to 359.999)
+    float conformityIndex;   // in range [0, 1]
+    LocationTechnologyMask techMask;
+    LocationSpoofMask spoofMask;
+    uint64_t elapsedRealTime;    // in ns
+    uint64_t elapsedRealTimeUnc; // in ns
+} Location;
+
+typedef enum {
+    LOC_REQ_ENGINE_FUSED_BIT = (1<<0),
+    LOC_REQ_ENGINE_SPE_BIT   = (1<<1),
+    LOC_REQ_ENGINE_PPE_BIT   = (1<<2),
+    LOC_REQ_ENGINE_VPE_BIT   = (1<<3)
+} LocReqEngineTypeMask;
+
+typedef enum {
+    LOC_OUTPUT_ENGINE_FUSED   = 0,
+    /** This is the GNSS fix from modem */
+    LOC_OUTPUT_ENGINE_SPE     = 1,
+    /** This is the GNSS fix with correction PPP/RTK correction */
+    LOC_OUTPUT_ENGINE_PPE     = 2,
+    LOC_OUTPUT_ENGINE_VPE = 3,
+    LOC_OUTPUT_ENGINE_COUNT,
+} LocOutputEngineType;
+
+struct LocationOptions {
+    uint32_t size;          // set to sizeof(LocationOptions)
+    uint32_t minInterval; // in milliseconds
+    uint32_t minDistance; // in meters. if minDistance > 0, gnssSvCallback/gnssNmeaCallback/
+                          // gnssMeasurementsCallback may not be called
+    GnssSuplMode mode;    // Standalone/MS-Based/MS-Assisted
+    // behavior when this field is 0:
+    //  if engine hub is running, this will be fused fix,
+    //  if engine hub is not running, this will be SPE fix
+    LocReqEngineTypeMask locReqEngTypeMask;
+
+    inline LocationOptions() :
+            size(0), minInterval(0), minDistance(0), mode(GNSS_SUPL_MODE_STANDALONE),
+            locReqEngTypeMask((LocReqEngineTypeMask)0) {}
+};
+
+typedef enum {
+    GNSS_POWER_MODE_INVALID = 0,
+    GNSS_POWER_MODE_M1,  /* Improved Accuracy Mode */
+    GNSS_POWER_MODE_M2,  /* Normal Mode */
+    GNSS_POWER_MODE_M3,  /* Background Mode */
+    GNSS_POWER_MODE_M4,  /* Background Mode */
+    GNSS_POWER_MODE_M5   /* Background Mode */
+} GnssPowerMode;
+
+struct TrackingOptions : LocationOptions {
+    GnssPowerMode powerMode; /* Power Mode to be used for time based tracking
+                                sessions */
+    uint32_t tbm;  /* Time interval between measurements specified in millis.
+                      Applicable to background power modes */
+
+    inline TrackingOptions() :
+            LocationOptions(), powerMode(GNSS_POWER_MODE_INVALID), tbm(0) {}
+    inline TrackingOptions(uint32_t s, GnssPowerMode m, uint32_t t) :
+            LocationOptions(), powerMode(m), tbm(t) { LocationOptions::size = s; }
+    inline TrackingOptions(const LocationOptions& options) :
+            LocationOptions(options), powerMode(GNSS_POWER_MODE_INVALID), tbm(0) {}
+    inline void setLocationOptions(const LocationOptions& options) {
+        size = sizeof(TrackingOptions);
+        minInterval = options.minInterval;
+        minDistance = options.minDistance;
+        mode = options.mode;
+        locReqEngTypeMask = options.locReqEngTypeMask;
+    }
+    inline LocationOptions getLocationOptions() {
+        LocationOptions locOption;
+        locOption.size = sizeof(locOption);
+        locOption.minDistance = minDistance;
+        locOption.minInterval = minInterval;
+        locOption.mode = mode;
+        locOption.locReqEngTypeMask = locReqEngTypeMask;
+        return locOption;
+    }
+};
+
+struct BatchingOptions : LocationOptions {
+    BatchingMode batchingMode;
+
+    inline BatchingOptions() :
+            LocationOptions(), batchingMode(BATCHING_MODE_ROUTINE) {}
+    inline BatchingOptions(uint32_t s, BatchingMode m) :
+            LocationOptions(), batchingMode(m) { LocationOptions::size = s; }
+    inline BatchingOptions(const LocationOptions& options) :
+            LocationOptions(options), batchingMode(BATCHING_MODE_ROUTINE) {}
+    inline void setLocationOptions(const LocationOptions& options) {
+        minInterval = options.minInterval;
+        minDistance = options.minDistance;
+        mode = options.mode;
+    }
+};
+
+typedef struct {
+    uint32_t size;
+    BatchingStatus batchingStatus;
+} BatchingStatusInfo;
+
+typedef struct {
+    uint32_t size;                          // set to sizeof(GeofenceOption)
+    GeofenceBreachTypeMask breachTypeMask;  // bitwise OR of GeofenceBreachTypeBits
+    uint32_t responsiveness;                // in milliseconds
+    uint32_t dwellTime;                     // in seconds
+} GeofenceOption;
+
+typedef struct {
+    uint32_t size;    // set to sizeof(GeofenceInfo)
+    double latitude;  // in degrees
+    double longitude; // in degrees
+    double radius;    // in meters
+} GeofenceInfo;
+
+typedef struct {
+    uint32_t size;             // set to sizeof(GeofenceBreachNotification)
+    uint32_t count;            // number of ids in array
+    uint32_t* ids;           // array of ids that have breached
+    Location location;       // location associated with breach
+    GeofenceBreachType type; // type of breach
+    uint64_t timestamp;      // timestamp of breach
+} GeofenceBreachNotification;
+
+typedef struct {
+    uint32_t size;                       // set to sizeof(GeofenceBreachNotification)
+    GeofenceStatusAvailable available; // GEOFENCE_STATUS_AVAILABILE_NO/_YES
+    LocationTechnologyType techType;   // GNSS
+} GeofenceStatusNotification;
+
+typedef struct {
+    uint64_t gpsSvUsedIdsMask;
+    uint64_t gloSvUsedIdsMask;
+    uint64_t galSvUsedIdsMask;
+    uint64_t bdsSvUsedIdsMask;
+    uint64_t qzssSvUsedIdsMask;
+    uint64_t navicSvUsedIdsMask;
+} GnssLocationSvUsedInPosition;
+
+typedef struct {
+    /** GnssSignalType mask */
+    GnssSignalTypeMask gnssSignalType;
+   /** Specifies GNSS Constellation Type */
+    Gnss_LocSvSystemEnumType gnssConstellation;
+    /** Unique SV Identifier.
+     *  For SV Range of supported constellation, please refer to
+     *  the comment section of svId in GnssSv.
+     *  For GLONASS:  When slot-number to SV ID mapping is unknown, set as 255.
+     */
+    uint16_t gnssSvId;
+} GnssMeasUsageInfo;
+
+/** @struct
+    Body Frame parameters
+*/
+typedef struct {
+    GnssLocationPosDataMask bodyFrameDataMask; // Contains Body frame LocPosDataMask bits
+    float longAccel;                           // Forward Acceleration in body frame (m/s2)
+    float latAccel;                            // Sideward Acceleration in body frame (m/s2)
+    float vertAccel;                           // Vertical Acceleration in body frame (m/s2)
+    float yawRate;                             // Heading Rate (Radians/second)
+    float pitch;                               // Body pitch (Radians)
+    float longAccelUnc;   // Uncertainty of Forward Acceleration in body frame
+    float latAccelUnc;    // Uncertainty of Side-ward Acceleration in body frame
+    float vertAccelUnc;   // Uncertainty of Vertical Acceleration in body frame
+    float yawRateUnc;     // Uncertainty of Heading Rate
+    float pitchUnc;       // Uncertainty of Body pitch
+} GnssLocationPositionDynamics;
+
+typedef struct {
+    GnssLocationPosDataMaskExt bodyFrameDataMask; // Contains Ext Body frame LocPosDataMask bits
+    float pitchRate;      // Body pitch rate (Radians/second)
+    float pitchRateUnc;   // Uncertainty of pitch rate (Radians/second)
+    float roll;           // Roll of body frame. Clockwise positive. (radian
+    float rollUnc;        // Uncertainty of Roll, 68% confidence level (radian)
+    float rollRate;       // Roll rate of body frame. Clockwise positive. (radian/second)
+    float rollRateUnc;    // Uncertainty of Roll rate, 68% confidence level (radian/second)
+    float yaw;            // Yaw of body frame. Clockwise positive (radian)
+    float yawUnc;         // Uncertainty of Yaw, 68% confidence level (radian)
+} GnssLocationPositionDynamicsExt;
+
+typedef struct {
+    /** Validity mask for below fields */
+    GnssSystemTimeStructTypeFlags validityMask;
+    /** Extended week number at reference tick.
+    Unit: Week.
+    Set to 65535 if week number is unknown.
+    For GPS:
+      Calculated from midnight, Jan. 6, 1980.
+      OTA decoded 10 bit GPS week is extended to map between:
+      [NV6264 to (NV6264 + 1023)].
+      NV6264: Minimum GPS week number configuration.
+      Default value of NV6264: 1738
+    For BDS:
+      Calculated from 00:00:00 on January 1, 2006 of Coordinated Universal Time (UTC).
+    For GAL:
+      Calculated from 00:00 UT on Sunday August 22, 1999 (midnight between August 21 and August 22).
+   */
+    uint16_t systemWeek;
+    /** Time in to the current week at reference tick.
+       Unit: Millisecond. Range: 0 to 604799999.
+       Check for systemClkTimeUncMs before use */
+    uint32_t systemMsec;
+    /** System clock time bias (sub-millisecond)
+        Units: Millisecond
+        Note: System time (TOW Millisecond) = systemMsec - systemClkTimeBias.
+        Check for systemClkTimeUncMs before use. */
+    float systemClkTimeBias;
+    /** Single sided maximum time bias uncertainty
+        Units: Millisecond */
+    float systemClkTimeUncMs;
+    /** FCount (free running HW timer) value. Don't use for relative time purpose
+         due to possible discontinuities.
+         Unit: Millisecond */
+    uint32_t refFCount;
+    /** Number of clock resets/discontinuities detected, affecting the local hardware counter value. */
+    uint32_t numClockResets;
+} GnssSystemTimeStructType;
+
+typedef struct {
+    /** GLONASS day number in four years. Refer to GLONASS ICD.
+        Applicable only for GLONASS and shall be ignored for other constellations.
+        If unknown shall be set to 65535 */
+    uint16_t gloDays;
+    /** Validity mask for below fields */
+    GnssGloTimeStructTypeFlags validityMask;
+    /** GLONASS time of day in Millisecond. Refer to GLONASS ICD.
+        Units: Millisecond
+        Check for gloClkTimeUncMs before use */
+    uint32_t gloMsec;
+    /** GLONASS clock time bias (sub-millisecond)
+        Units: Millisecond
+        Note: GLO time (TOD Millisecond) = gloMsec - gloClkTimeBias.
+        Check for gloClkTimeUncMs before use. */
+    float gloClkTimeBias;
+    /** Single sided maximum time bias uncertainty
+        Units: Millisecond */
+    float gloClkTimeUncMs;
+    /** FCount (free running HW timer) value. Don't use for relative time purpose
+        due to possible discontinuities.
+        Unit: Millisecond */
+    uint32_t  refFCount;
+    /** Number of clock resets/discontinuities detected, affecting the local hardware counter value. */
+    uint32_t numClockResets;
+    /** GLONASS four year number from 1996. Refer to GLONASS ICD.
+        Applicable only for GLONASS and shall be ignored for other constellations.
+        If unknown shall be set to 255 */
+    uint8_t gloFourYear;
+} GnssGloTimeStructType;
+
+typedef union {
+    GnssSystemTimeStructType gpsSystemTime;
+    GnssSystemTimeStructType galSystemTime;
+    GnssSystemTimeStructType bdsSystemTime;
+    GnssSystemTimeStructType qzssSystemTime;
+    GnssGloTimeStructType    gloSystemTime;
+    GnssSystemTimeStructType navicSystemTime;
+} SystemTimeStructUnion;
+    /** Time applicability of PVT report */
+typedef struct {
+    /** Specifies GNSS system time reported. Mandatory field */
+    Gnss_LocSvSystemEnumType gnssSystemTimeSrc;
+    /** Reporting of GPS system time is recommended.
+      If GPS time is unknown & other satellite system time is known,
+      it should be reported.
+      Mandatory field
+     */
+    SystemTimeStructUnion u;
+} GnssSystemTime;
+
+typedef uint32_t DrSolutionStatusMask;
+#define VEHICLE_SENSOR_SPEED_INPUT_DETECTED (1<<0)
+#define VEHICLE_SENSOR_SPEED_INPUT_USED     (1<<1)
+
+typedef struct {
+    double latitude;  // in degree
+    double longitude; // in degree
+    float altitude;  // altitude wrt to ellipsoid
+} LLAInfo;
+
+enum loc_sess_status {
+    LOC_SESS_SUCCESS,
+    LOC_SESS_INTERMEDIATE,
+    LOC_SESS_FAILURE
+};
+
+typedef struct {
+    uint32_t size;                      // set to sizeof(GnssLocationInfo)
+    Location location;                  // basic locaiton info, latitude, longitude, and etc
+    GnssLocationInfoFlagMask flags;     // bitwise OR of GnssLocationInfoBits for param validity
+    float altitudeMeanSeaLevel;         // altitude wrt mean sea level
+    float pdop;                         // position dilusion of precision
+    float hdop;                         // horizontal dilusion of precision
+    float vdop;                         // vertical dilusion of precision
+    float gdop;                         // geometric  dilution of precision
+    float tdop;                         // time dilution of precision
+    float magneticDeviation;            // magnetic deviation
+    LocationReliability horReliability; // horizontal reliability
+    LocationReliability verReliability; // vertical reliability
+    float horUncEllipseSemiMajor;       // horizontal elliptical accuracy semi-major axis
+    float horUncEllipseSemiMinor;       // horizontal elliptical accuracy semi-minor axis
+    float horUncEllipseOrientAzimuth;   // horizontal elliptical accuracy azimuth
+    float northStdDeviation;            // North standard deviation Unit: Meters
+    float eastStdDeviation;             // East standard deviation. Unit: Meters
+    float northVelocity;                // North Velocity.Unit: Meters/sec
+    float eastVelocity;                 // East Velocity Unit Meters/sec
+    float upVelocity;                   // Up Velocity. Unit Meters/sec
+    float northVelocityStdDeviation;
+    float eastVelocityStdDeviation;
+    float upVelocityStdDeviation;
+    uint16_t numSvUsedInPosition;
+    GnssLocationSvUsedInPosition svUsedInPosition;// Gnss sv used in position data
+    GnssLocationNavSolutionMask navSolutionMask;  // Nav solution mask to indicate sbas corrections
+    GnssLocationPositionDynamics bodyFrameData;   // Body Frame Dynamics: 4wayAcceleration and
+                                                  // pitch set with validity
+    GnssSystemTime gnssSystemTime;            // GNSS System Time
+    uint8_t numOfMeasReceived; // Number of measurements received for use in fix.
+    GnssMeasUsageInfo measUsageInfo[GNSS_SV_MAX]; // GNSS Measurement Usage info
+    uint8_t leapSeconds;                          // leap second
+    float timeUncMs;                              // Time uncertainty in milliseconds
+    uint8_t calibrationConfidence;                // Sensor calibration confidence percent,
+                                                  // in range of [0, 100]
+    DrCalibrationStatusMask calibrationStatus;    // Sensor calibration status
+    // location engine type. When the fix. when the type is set to
+    // LOC_ENGINE_SRC_FUSED, the fix is the propagated/aggregated
+    // reports from all engines running on the system (e.g.:
+    // DR/SPE/PPE/VPE). To check which location engine contributes to
+    // the fused output, check for locOutputEngMask.
+    LocOutputEngineType locOutputEngType;
+    // when loc output eng type is set to fused, this field
+    // indicates the set of engines contribute to the fix.
+    PositioningEngineMask locOutputEngMask;
+    // When robust location is enabled, this field
+    // will how well the various input data considered for
+    // navigation solution conform to expectations.
+    // Range: 0 (least conforming) to 1 (most conforming)
+    float conformityIndex;
+    GnssLocationPositionDynamicsExt bodyFrameDataExt;   // Additional Body Frame Dynamics
+    // VRR-based latitude/longitude/altitude
+    LLAInfo llaVRPBased;
+    // VRR-based east, north, and up velocity
+    float enuVelocityVRPBased[3];
+    DrSolutionStatusMask drSolutionStatusMask;
+    // true: altitude is assumed, false: altitude is calculated
+    bool altitudeAssumed;
+    // location session status
+    loc_sess_status sessionStatus;
+} GnssLocationInfoNotification;
+
+typedef struct {
+    uint32_t size;                           // set to sizeof(GnssNiNotification)
+    GnssNiType type;                       // type of NI (Voice, SUPL, Control Plane)
+    GnssNiOptionsMask options;             // bitwise OR of GnssNiOptionsBits
+    uint32_t timeout;                      // time (seconds) to wait for user input
+    GnssNiResponse timeoutResponse;        // the response that should be sent when timeout expires
+    char requestor[GNSS_NI_REQUESTOR_MAX]; // the requestor that is making the request
+    GnssNiEncodingType requestorEncoding;  // the encoding type for requestor
+    char message[GNSS_NI_MESSAGE_ID_MAX];  // the message to show user
+    GnssNiEncodingType messageEncoding;    // the encoding type for message
+    char extras[GNSS_NI_MESSAGE_ID_MAX];
+} GnssNiNotification;
+
+// carrier frequency of the signal tracked
+#define GPS_L1CA_CARRIER_FREQUENCY      (1575420000.0)
+#define GPS_L1C_CARRIER_FREQUENCY       (1575420000.0)
+#define GPS_L2C_L_CARRIER_FREQUENCY     (1227600000.0)
+#define GPS_L5_Q_CARRIER_FREQUENCY      (1176450000.0)
+#define GLONASS_G1_CARRIER_FREQUENCY    (1602000000.0)
+#define GLONASS_G2_CARRIER_FREQUENCY    (1246000000.0)
+#define GALILEO_E1_C_CARRIER_FREQUENCY  (1575420000.0)
+#define GALILEO_E5A_Q_CARRIER_FREQUENCY (1176450000.0)
+#define GALILEO_E5B_Q_CARRIER_FREQUENCY (1207140000.0)
+#define BEIDOU_B1_I_CARRIER_FREQUENCY   (1561098000.0)
+#define BEIDOU_B1C_CARRIER_FREQUENCY    (1575420000.0)
+#define BEIDOU_B2_I_CARRIER_FREQUENCY   (1207140000.0)
+#define BEIDOU_B2A_I_CARRIER_FREQUENCY  (1176450000.0)
+#define BEIDOU_B2A_Q_CARRIER_FREQUENCY  (1176450000.0)
+#define QZSS_L1CA_CARRIER_FREQUENCY     (1575420000.0)
+#define QZSS_L1S_CARRIER_FREQUENCY      (1575420000.0)
+#define QZSS_L2C_L_CARRIER_FREQUENCY    (1227600000.0)
+#define QZSS_L5_Q_CARRIER_FREQUENCY     (1176450000.0)
+#define SBAS_L1_CA_CARRIER_FREQUENCY    (1575420000.0)
+#define NAVIC_L5_CARRIER_FREQUENCY      (1176450000.0)
+
+typedef struct {
+    uint32_t size;       // set to sizeof(GnssSv)
+    // Unique SV Identifier.
+    // SV Range for supported constellation is specified as below:
+    //    - For GPS:     1 to 32
+    //    - For GLONASS: 65 to 96
+    //    - For SBAS:    120 to 158 and 183 to 191
+    //    - For QZSS:    193 to 197
+    //    - For BDS:     201 to 263
+    //    - For GAL:     301 to 336
+    //    - For NAVIC:   401 to 414
+    uint16_t svId;
+    GnssSvType type;   // type of SV (GPS, SBAS, GLONASS, QZSS, BEIDOU, GALILEO, NAVIC)
+    float cN0Dbhz;     // signal strength
+    float elevation;   // elevation of SV (in degrees)
+    float azimuth;     // azimuth of SV (in degrees)
+    GnssSvOptionsMask gnssSvOptionsMask; // Bitwise OR of GnssSvOptionsBits
+    float carrierFrequencyHz; // carrier frequency of the signal tracked
+    GnssSignalTypeMask gnssSignalTypeMask; // Specifies GNSS signal type
+    double basebandCarrierToNoiseDbHz; // baseband signal strength
+    uint16_t  gloFrequency; // GLONASS Frequency channel number
+} GnssSv;
+
+struct GnssConfigSetAssistanceServer {
+    uint32_t size;             // set to sizeof(GnssConfigSetAssistanceServer)
+    GnssAssistanceType type; // SUPL or C2K
+    const char* hostName;    // null terminated string
+    uint32_t port;           // port of server
+
+    inline bool equals(const GnssConfigSetAssistanceServer& config) {
+        if (config.type == type && config.port == port &&
+               ((NULL == config.hostName && NULL == hostName) ||
+                (NULL != config.hostName && NULL != hostName &&
+                     0 == strcmp(config.hostName, hostName)))) {
+            return true;
+        }
+        return false;
+    }
+};
+
+typedef struct {
+    // set to sizeof(GnssMeasurementsData)
+    uint32_t size;
+    // bitwise OR of GnssMeasurementsDataFlagsBits
+    GnssMeasurementsDataFlagsMask flags;
+    // Unique SV Identifier
+    // For SV Range of supported constellation,
+    // please refer to the comment section of svId in GnssSv.
+    int16_t svId;
+    GnssSvType svType;
+    double timeOffsetNs;
+    GnssMeasurementsStateMask stateMask;       // bitwise OR of GnssMeasurementsStateBits
+    int64_t receivedSvTimeNs;
+    int64_t receivedSvTimeUncertaintyNs;
+    double carrierToNoiseDbHz;
+    double pseudorangeRateMps;
+    double pseudorangeRateUncertaintyMps;
+    GnssMeasurementsAdrStateMask adrStateMask; // bitwise OR of GnssMeasurementsAdrStateBits
+    double adrMeters;
+    double adrUncertaintyMeters;
+    float carrierFrequencyHz;
+    int64_t carrierCycles;
+    double carrierPhase;
+    double carrierPhaseUncertainty;
+    GnssMeasurementsMultipathIndicator multipathIndicator;
+    double signalToNoiseRatioDb;
+    double agcLevelDb;
+    GnssMeasurementsCodeType codeType;
+    char otherCodeTypeName[GNSS_MAX_NAME_LENGTH];
+    double basebandCarrierToNoiseDbHz;
+    GnssSignalTypeMask gnssSignalType;
+    double fullInterSignalBiasNs;
+    double fullInterSignalBiasUncertaintyNs;
+    double satelliteInterSignalBiasNs;
+    double satelliteInterSignalBiasUncertaintyNs;
+    int16_t gloFrequency;
+    uint8_t cycleSlipCount;
+} GnssMeasurementsData;
+
+typedef struct {
+    GnssSvType svType;
+    float carrierFrequencyHz;
+    GnssMeasurementsCodeType codeType;
+    char otherCodeTypeName[GNSS_MAX_NAME_LENGTH];
+} GnssMeasurementsSignalType;
+
+typedef struct {
+    uint32_t size;                          // set to sizeof(GnssReflectingPlane)
+    double latitudeDegrees;
+    double longitudeDegrees;
+    double altitudeMeters;
+    double azimuthDegrees;
+} GnssReflectingPlane;
+
+typedef struct {
+    uint32_t size;                          // set to sizeof(GnssSingleSatCorrection)
+    GnssSingleSatCorrectionMask flags;
+    GnssSvType svType;
+    uint16_t svId;
+    float carrierFrequencyHz;
+    float probSatIsLos;
+    float excessPathLengthMeters;
+    float excessPathLengthUncertaintyMeters;
+    GnssReflectingPlane reflectingPlane;
+} GnssSingleSatCorrection;
+
+typedef struct {
+    uint32_t size;                          // set to sizeof(GnssMeasurementCorrections)
+    double latitudeDegrees;
+    double longitudeDegrees;
+    double altitudeMeters;
+    double horizontalPositionUncertaintyMeters;
+    double verticalPositionUncertaintyMeters;
+    uint64_t toaGpsNanosecondsOfWeek;
+    std::vector<GnssSingleSatCorrection> satCorrections;
+    bool hasEnvironmentBearing;
+    float environmentBearingDegrees;
+    float environmentBearingUncertaintyDegrees;
+} GnssMeasurementCorrections;
+
+typedef struct {
+    uint32_t size;                          // set to sizeof(GnssMeasurementsClock)
+    GnssMeasurementsClockFlagsMask flags; // bitwise OR of GnssMeasurementsClockFlagsBits
+    int16_t leapSecond;
+    int64_t timeNs;
+    double timeUncertaintyNs;
+    int64_t fullBiasNs;
+    double biasNs;
+    double biasUncertaintyNs;
+    double driftNsps;
+    double driftUncertaintyNsps;
+    uint32_t hwClockDiscontinuityCount;
+    GnssMeasurementsSignalType referenceSignalTypeForIsb;
+    uint64_t elapsedRealTime;    // in ns
+    uint64_t elapsedRealTimeUnc; // in ns
+} GnssMeasurementsClock;
+
+typedef struct {
+    uint32_t size;                 // set to sizeof(GnssSvNotification)
+    uint32_t count;                // number of SVs in the GnssSv array
+    bool gnssSignalTypeMaskValid;
+    GnssSv gnssSvs[GNSS_SV_MAX]; // information on a number of SVs
+} GnssSvNotification;
+
+typedef struct {
+    uint32_t size;         // set to sizeof(GnssNmeaNotification)
+    uint64_t timestamp;  // timestamp
+    const char* nmea;    // nmea text
+    uint32_t length;       // length of the nmea text
+} GnssNmeaNotification;
+
+typedef struct {
+    uint32_t size;                 // set to sizeof(GnssDataNotification)
+    GnssDataMask  gnssDataMask[GNSS_LOC_MAX_NUMBER_OF_SIGNAL_TYPES];  // bitwise OR of GnssDataBits
+    double        jammerInd[GNSS_LOC_MAX_NUMBER_OF_SIGNAL_TYPES];     // Jammer Indication
+    double        agc[GNSS_LOC_MAX_NUMBER_OF_SIGNAL_TYPES];           // Automatic gain control
+} GnssDataNotification;
+
+typedef struct {
+    uint32_t size;         // set to sizeof(GnssMeasurementsNotification)
+    uint32_t count;        // number of items in GnssMeasurements array
+    GnssMeasurementsData measurements[GNSS_MEASUREMENTS_MAX];
+    GnssMeasurementsClock clock; // clock
+} GnssMeasurementsNotification;
+
+typedef uint32_t GnssSvId;
+
+struct GnssSvIdSource{
+    uint32_t size;              // set to sizeof(GnssSvIdSource)
+    GnssSvType constellation;   // constellation for the sv to blacklist
+    GnssSvId svId;              // Unique SV Identifier,
+                                // For SV Range of supported constellation,
+                                // please refer to the comment section of svId in GnssSv.
+};
+inline bool operator ==(GnssSvIdSource const& left, GnssSvIdSource const& right) {
+    return left.size == right.size &&
+            left.constellation == right.constellation && left.svId == right.svId;
+}
+
+#define GNSS_SV_CONFIG_ALL_BITS_ENABLED_MASK ((uint64_t)0xFFFFFFFFFFFFFFFF)
+struct GnssSvIdConfig {
+    uint32_t size; // set to sizeof(GnssSvIdConfig)
+
+    // GLONASS - SV 65 maps to bit 0
+#define GNSS_SV_CONFIG_GLO_INITIAL_SV_ID 65
+    uint64_t gloBlacklistSvMask;
+
+    // BEIDOU - SV 201 maps to bit 0
+#define GNSS_SV_CONFIG_BDS_INITIAL_SV_ID 201
+    uint64_t bdsBlacklistSvMask;
+
+    // QZSS - SV 193 maps to bit 0
+#define GNSS_SV_CONFIG_QZSS_INITIAL_SV_ID 193
+    uint64_t qzssBlacklistSvMask;
+
+    // GAL - SV 301 maps to bit 0
+#define GNSS_SV_CONFIG_GAL_INITIAL_SV_ID 301
+    uint64_t galBlacklistSvMask;
+
+    // SBAS - SV 120 to 158, maps to 0 to 38
+    //        SV 183 to 191, maps to 39 to 47
+#define GNSS_SV_CONFIG_SBAS_INITIAL_SV_ID     120
+#define GNSS_SV_CONFIG_SBAS_INITIAL_SV_LENGTH 39
+#define GNSS_SV_CONFIG_SBAS_INITIAL2_SV_ID    183
+    uint64_t sbasBlacklistSvMask;
+
+    //Navic - SV 401 maps to bit 0
+#define GNSS_SV_CONFIG_NAVIC_INITIAL_SV_ID 401
+    uint64_t navicBlacklistSvMask;
+
+    inline bool equals(const GnssSvIdConfig& inConfig) {
+        if ((inConfig.size == size) &&
+                (inConfig.gloBlacklistSvMask == gloBlacklistSvMask) &&
+                (inConfig.bdsBlacklistSvMask == bdsBlacklistSvMask) &&
+                (inConfig.qzssBlacklistSvMask == qzssBlacklistSvMask) &&
+                (inConfig.galBlacklistSvMask == galBlacklistSvMask) &&
+                (inConfig.sbasBlacklistSvMask == sbasBlacklistSvMask) &&
+                (inConfig.navicBlacklistSvMask == navicBlacklistSvMask)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+};
+
+// Specify the valid mask for robust location configure
+// defined in GnssConfigRobustLocation.
+enum GnssConfigRobustLocationValidMask {
+    // GnssConfigRobustLocation has valid enabled field.
+    GNSS_CONFIG_ROBUST_LOCATION_ENABLED_VALID_BIT          = (1<<0),
+    // GnssConfigRobustLocation has valid enabledForE911 field.
+    GNSS_CONFIG_ROBUST_LOCATION_ENABLED_FOR_E911_VALID_BIT = (1<<1),
+    // GnssConfigRobustLocation has valid version field.
+    GNSS_CONFIG_ROBUST_LOCATION_VERSION_VALID_BIT          = (1<<2),
+};
+
+struct GnssConfigRobustLocationVersion {
+    // Major version number
+    uint8_t major;
+    // Minor version number
+    uint16_t minor;
+    inline bool equals(const GnssConfigRobustLocationVersion& version) const {
+        return (version.major == major && version.minor == minor);
+    }
+};
+
+// specify the robust location configuration used by modem GNSS engine
+struct GnssConfigRobustLocation {
+   GnssConfigRobustLocationValidMask validMask;
+   bool enabled;
+   bool enabledForE911;
+   GnssConfigRobustLocationVersion version;
+
+   inline bool equals(const GnssConfigRobustLocation& config) const {
+        if (config.validMask == validMask &&
+            config.enabled == enabled &&
+            config.enabledForE911 == enabledForE911 &&
+            config.version.equals(version)) {
+            return true;
+        }
+        return false;
+    }
+};
+
+/* Mask indicating enabled or disabled constellations and
+   secondary frequency.*/
+typedef uint64_t GnssSvTypesMask;
+typedef enum {
+    GNSS_SV_TYPES_MASK_GLO_BIT   = (1<<0),
+    GNSS_SV_TYPES_MASK_BDS_BIT   = (1<<1),
+    GNSS_SV_TYPES_MASK_QZSS_BIT  = (1<<2),
+    GNSS_SV_TYPES_MASK_GAL_BIT   = (1<<3),
+    GNSS_SV_TYPES_MASK_NAVIC_BIT = (1<<4),
+    GNSS_SV_TYPES_MASK_GPS_BIT   = (1<<5),
+} GnssSvTypesMaskBits;
+#define GNSS_SV_TYPES_MASK_ALL \
+    (GNSS_SV_TYPES_MASK_GPS_BIT|GNSS_SV_TYPES_MASK_GLO_BIT|GNSS_SV_TYPES_MASK_BDS_BIT|\
+     GNSS_SV_TYPES_MASK_QZSS_BIT|GNSS_SV_TYPES_MASK_GAL_BIT|GNSS_SV_TYPES_MASK_NAVIC_BIT)
+
+/* This SV Type config is injected directly to GNSS Adapter
+ * bypassing Location API */
+struct GnssSvTypeConfig{
+    uint32_t size; // set to sizeof(GnssSvTypeConfig)
+    // Enabled Constellations
+    GnssSvTypesMask enabledSvTypesMask;
+    // Disabled Constellations
+    GnssSvTypesMask blacklistedSvTypesMask;
+
+    inline bool equals (const GnssSvTypeConfig& inConfig) const {
+        return ((inConfig.size == size) &&
+                (inConfig.enabledSvTypesMask == enabledSvTypesMask) &&
+                (inConfig.blacklistedSvTypesMask == blacklistedSvTypesMask));
+    }
+};
+
+struct GnssConfig{
+    uint32_t size;  // set to sizeof(GnssConfig)
+    GnssConfigFlagsMask flags; // bitwise OR of GnssConfigFlagsBits to mark which params are valid
+    GnssConfigGpsLock gpsLock;
+    GnssConfigSuplVersion suplVersion;
+    GnssConfigSetAssistanceServer assistanceServer;
+    GnssConfigLppProfileMask lppProfileMask;
+    GnssConfigLppeControlPlaneMask lppeControlPlaneMask;
+    GnssConfigLppeUserPlaneMask lppeUserPlaneMask;
+    GnssConfigAGlonassPositionProtocolMask aGlonassPositionProtocolMask;
+    GnssConfigEmergencyPdnForEmergencySupl emergencyPdnForEmergencySupl;
+    GnssConfigSuplEmergencyServices suplEmergencyServices;
+    GnssConfigSuplModeMask suplModeMask; //bitwise OR of GnssConfigSuplModeBits
+    std::vector<GnssSvIdSource> blacklistedSvIds;
+    uint32_t emergencyExtensionSeconds;
+    GnssConfigRobustLocation robustLocationConfig;
+    uint16_t minGpsWeek;
+    uint8_t minSvElevation;
+    GnssSvTypeConfig secondaryBandConfig;
+
+    inline bool equals(const GnssConfig& config) {
+        if (flags == config.flags &&
+                gpsLock == config.gpsLock &&
+                suplVersion == config.suplVersion &&
+                assistanceServer.equals(config.assistanceServer) &&
+                lppProfileMask == config.lppProfileMask &&
+                lppeControlPlaneMask == config.lppeControlPlaneMask &&
+                lppeUserPlaneMask == config.lppeUserPlaneMask &&
+                aGlonassPositionProtocolMask == config.aGlonassPositionProtocolMask &&
+                emergencyPdnForEmergencySupl == config.emergencyPdnForEmergencySupl &&
+                suplEmergencyServices == config.suplEmergencyServices &&
+                suplModeMask == config.suplModeMask  &&
+                blacklistedSvIds == config.blacklistedSvIds &&
+                emergencyExtensionSeconds == config.emergencyExtensionSeconds &&
+                robustLocationConfig.equals(config.robustLocationConfig) &&
+                minGpsWeek == config.minGpsWeek &&
+                minSvElevation == config.minSvElevation &&
+                secondaryBandConfig.equals(config.secondaryBandConfig)) {
+            return true;
+        }
+        return false;
+    }
+};
+
+typedef struct {
+    uint32_t size;                        // set to sizeof
+    bool                                mValid;
+    Location                            mLocation;
+    double                              verticalAccuracyMeters;
+    double                              speedAccuracyMetersPerSecond;
+    double                              bearingAccuracyDegrees;
+    timespec                            mUtcReported;
+} GnssDebugLocation;
+
+typedef struct {
+    uint32_t size;                        // set to sizeof
+    bool                                mValid;
+    int64_t                             timeEstimate;
+    float                               timeUncertaintyNs;
+    float                               frequencyUncertaintyNsPerSec;
+} GnssDebugTime;
+
+typedef struct {
+    // set to sizeof
+    uint32_t size;
+    // Unique SV Identifier
+    // For SV Range of supported constellation,
+    // please refer to the comment section of svId in GnssSv.
+    uint32_t                            svid;
+    GnssSvType                          constellation;
+    GnssEphemerisType                   mEphemerisType;
+    GnssEphemerisSource                 mEphemerisSource;
+    GnssEphemerisHealth                 mEphemerisHealth;
+    float                               ephemerisAgeSeconds;
+    bool                                serverPredictionIsAvailable;
+    float                               serverPredictionAgeSeconds;
+} GnssDebugSatelliteInfo;
+
+typedef struct {
+    uint32_t size;                        // set to sizeof
+    GnssDebugLocation                   mLocation;
+    GnssDebugTime                       mTime;
+    std::vector<GnssDebugSatelliteInfo> mSatelliteInfo;
+} GnssDebugReport;
+
+typedef uint32_t LeapSecondSysInfoMask;
+typedef enum {
+    // current leap second info is available. This info will only
+    // be available if the leap second change info is not available.
+    //
+    // If leap second change info is avaiable, to figure out
+    // the current leap second info, compare current gps time with
+    // the gps timestamp of leap second change to know whether to choose
+    // leapSecondBefore or leapSecondAfter as current leap second.
+    LEAP_SECOND_SYS_INFO_CURRENT_LEAP_SECONDS_BIT = (1ULL << 0),
+    // the last known leap change event is available.
+    // The info can be available on two scenario:
+    // 1: this leap second change event has been scheduled and yet to happen
+    // 2: this leap second change event has already happened and next
+    //    leap second change event has not yet been scheduled.
+    LEAP_SECOND_SYS_INFO_LEAP_SECOND_CHANGE_BIT = (1ULL << 1),
+} LeapSecondSysInfoDataBits;
+
+struct LeapSecondChangeInfo {
+    // GPS timestamp that corrresponds to the last known
+    // leap second change event.
+    //
+    // The info can be available on two scenario:
+    // 1: this leap second change event has been scheduled and yet to happen
+    // 2: this leap second change event has already happened and next
+    //    leap second change event has not yet been scheduled.
+    GnssSystemTimeStructType gpsTimestampLsChange;
+    // Number of leap seconds prior to the leap second change event
+    // that corresponds to the timestamp at gpsTimestampLsChange.
+    uint8_t leapSecondsBeforeChange;
+    // Number of leap seconds after the leap second change event
+    // that corresponds to the timestamp at gpsTimestampLsChange.
+    uint8_t leapSecondsAfterChange;
+};
+
+struct LeapSecondSystemInfo {
+    LeapSecondSysInfoMask leapSecondInfoMask;
+    uint8_t               leapSecondCurrent;
+    LeapSecondChangeInfo  leapSecondChangeInfo;
+};
+
+typedef uint32_t LocationSystemInfoMask;
+typedef enum {
+    // contains current leap second or leap second change info
+    LOCATION_SYS_INFO_LEAP_SECOND = (1ULL << 0),
+} LocationSystemInfoDataBits;
+
+struct LocationSystemInfo {
+    LocationSystemInfoMask systemInfoMask;
+    LeapSecondSystemInfo   leapSecondSysInfo;
+};
+
+// Specify the set of terrestrial technologies
+enum TerrestrialTechMask {
+    TERRESTRIAL_TECH_GTP_WWAN = 1 << 0,
+};
+
+// Specify parameters related to lever arm
+struct LeverArmParams {
+    // Offset along the vehicle forward axis
+    float forwardOffsetMeters;
+    // Offset along the vehicle starboard axis
+    float sidewaysOffsetMeters;
+    // Offset along the vehicle up axis
+    float upOffsetMeters;
+};
+
+typedef uint32_t LeverArmTypeMask;
+
+enum LeverArmTypeBits {
+    // Lever arm regarding the VRP (Vehicle Reference Point) w.r.t
+    // the origin (at the GPS Antenna)
+    LEVER_ARM_TYPE_GNSS_TO_VRP_BIT = (1<<0),
+    // Lever arm regarding GNSS Antenna w.r.t the origin at the IMU
+    // e.g.: inertial measurement unit for DR (dead reckoning
+    // engine)
+    LEVER_ARM_TYPE_DR_IMU_TO_GNSS_BIT = (1<<1),
+    // Lever arm regarding GNSS Antenna w.r.t the origin at the
+    // IMU (inertial measurement unit) for VEPP (vision enhanced
+    // precise positioning engine)
+    LEVER_ARM_TYPE_VEPP_IMU_TO_GNSS_BIT = (1<<2)
+};
+
+struct LeverArmConfigInfo {
+    // Valid mask for the types of lever arm parameters provided
+    LeverArmTypeMask leverArmValidMask;
+    // Lever arm regarding the VRP (Vehicle Reference Point) w.r.t the origin
+    // (at the GPS Antenna)
+    LeverArmParams   gnssToVRP;
+    // Lever arm parameters regarding GNSS Antenna w.r.t the origin at the IMU
+    // (inertial measurement unit) for DR (dead reckoning engine)
+    LeverArmParams   drImuToGnss;
+    // Lever arm regarding GNSS Antenna w.r.t the origin at the IMU
+    // (inertial measurement unit) for VEPP (vision enhanced precise position engine)
+    LeverArmParams   veppImuToGnss;
+};
+
+// Specify vehicle body-to-Sensor mount parameters to be used
+// by dead reckoning positioning engine.
+struct BodyToSensorMountParams {
+    // The misalignment of the sensor board along the
+    // horizontal plane of the vehicle chassis measured looking
+    // from the vehicle to forward direction. In unit of degree.
+    float rollOffset;
+    // The misalignment along the horizontal plane of the vehicle
+    // chassis measured looking from the vehicle to the right
+    // side. Positive pitch indicates vehicle is inclined such
+    // that forward wheels are at higher elevation than rear
+    // wheels. In unit of degree.
+    float yawOffset;
+    // The angle between the vehicle forward direction and the
+    // sensor axis as seen from the top of the vehicle, and
+    // measured in counterclockwise direction. In unit of degree.
+    float pitchOffset;
+    // Single uncertainty number that may be the largest of the
+    // roll, pitch and yaw offset uncertainties.
+    float offsetUnc;
+};
+
+typedef uint64_t DeadReckoningEngineConfigValidMask;
+// Specify the valid mask for the configuration paramters of
+// dead reckoning position engine.
+enum DeadReckoningEngineConfigValidBit {
+    // DeadReckoningEngineConfig has valid
+    // DeadReckoningEngineConfig::DeadReckoningEngineConfig.
+    BODY_TO_SENSOR_MOUNT_PARAMS_BIT    = (1<<0),
+    // DeadReckoningEngineConfig has valid
+    //  DeadReckoningEngineConfig::vehicleSpeedScaleFactor.
+    VEHICLE_SPEED_SCALE_FACTOR_BIT     = (1<<1),
+    // DeadReckoningEngineConfig has valid
+    //  DeadReckoningEngineConfig::vehicleSpeedScaleFactorUnc.
+    VEHICLE_SPEED_SCALE_FACTOR_UNC_BIT = (1<<2),
+    // DeadReckoningEngineConfig has valid
+    //  DeadReckoningEngineConfig::gyroScaleFactor.
+    GYRO_SCALE_FACTOR_BIT              = (1<<3),
+    // DeadReckoningEngineConfig has valid
+    // DeadReckoningEngineConfig::gyroScaleFactorUnc.
+    GYRO_SCALE_FACTOR_UNC_BIT          = (1<<4),
+};
+
+// Specify the configuration parameters for the dead reckoning
+//  position engine
+struct DeadReckoningEngineConfig{
+    // Specify the valid fields in the config.
+    DeadReckoningEngineConfigValidMask validMask;
+    // Body to sensor mount parameters for use by dead reckoning
+    //  positioning engine
+    BodyToSensorMountParams bodyToSensorMountParams;
+
+    // Vehicle Speed Scale Factor configuration input for the dead
+    // reckoning positioning engine. The multiplicative scale
+    // factor is applied to received Vehicle Speed value (in m/s)
+    // to obtain the true Vehicle Speed.
+    //
+    // Range is [0.9 to 1.1].
+    //
+    // Note: The scale factor is specific to a given vehicle
+    // make & model.
+    float vehicleSpeedScaleFactor;
+    // Vehicle Speed Scale Factor Uncertainty (68% confidence)
+    // configuration input for the dead reckoning positioning
+    // engine.
+    //
+    // Range is [0.0 to 0.1].
+    //
+    // Note: The scale factor unc is specific to a given vehicle
+    // make & model.
+    float vehicleSpeedScaleFactorUnc;
+
+    // Gyroscope Scale Factor configuration input for the dead
+    // reckoning positioning engine. The multiplicative scale
+    // factor is applied to received gyroscope value to obtain the
+    // true value.
+    //
+    // Range is [0.9 to 1.1].
+    //
+    // Note: The scale factor is specific to the Gyroscope sensor
+    // and typically derived from either sensor data-sheet or
+    // from actual calibration.
+    float gyroScaleFactor;
+
+    // Gyroscope Scale Factor uncertainty (68% confidence)
+    // configuration input for the dead reckoning positioning
+    // engine.
+    //
+    // Range is [0.0 to 0.1].
+    // engine.
+    //
+    // Note: The scale factor unc is specific to the make & model
+    // of Gyroscope sensor and typically derived from either
+    // sensor data-sheet or from actual calibration.
+    float gyroScaleFactorUnc;
+};
+
+/* Provides the capabilities of the system
+   capabilities callback is called once soon after createInstance is called */
+typedef std::function<void(
+    LocationCapabilitiesMask capabilitiesMask // bitwise OR of LocationCapabilitiesBits
+)> capabilitiesCallback;
+
+/* Used by tracking, batching, and miscellanous APIs
+   responseCallback is called for every Tracking, Batching API, and Miscellanous API */
+typedef std::function<void(
+    LocationError err, // if not SUCCESS, then id is not valid
+    uint32_t id        // id to be associated to the request
+)> responseCallback;
+
+/* Used by APIs that gets more than one LocationError in it's response
+   collectiveResponseCallback is called for every geofence API call.
+   ids array and LocationError array are only valid until collectiveResponseCallback returns. */
+typedef std::function<void(
+    uint32_t count, // number of locations in arrays
+    LocationError* errs, // array of LocationError associated to the request
+    uint32_t* ids // array of ids to be associated to the request
+)> collectiveResponseCallback;
+
+/* Used for startTracking API, optional can be NULL
+   trackingCallback is called when delivering a location in a tracking session
+   broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    Location location
+)> trackingCallback;
+
+/* Used for startBatching API, optional can be NULL
+   batchingCallback is called when delivering locations in a batching session.
+   broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    uint32_t count,      // number of locations in array
+    Location* location, // array of locations
+    BatchingOptions batchingOptions // Batching options
+)> batchingCallback;
+
+typedef std::function<void(
+    BatchingStatusInfo batchingStatus, // batch status
+    std::list<uint32_t> & listOfCompletedTrips
+)> batchingStatusCallback;
+
+/* Gives GNSS Location information, optional can be NULL
+    gnssLocationInfoCallback is called only during a tracking session
+    broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    GnssLocationInfoNotification gnssLocationInfoNotification
+)> gnssLocationInfoCallback;
+
+/* Gives default combined location information from all engines and
+   location information individually from selected engines.
+   This callback is only used when there are multiple engines
+   running in the system.
+
+   optional can be NULL
+
+   engineLocationsInfoCallback is called only during a tracking session
+   broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    uint32_t count,
+    GnssLocationInfoNotification* engineLocationInfoNotification
+)> engineLocationsInfoCallback;
+
+/* Used for addGeofences API, optional can be NULL
+   geofenceBreachCallback is called when any number of geofences have a state change */
+typedef std::function<void(
+    GeofenceBreachNotification geofenceBreachNotification
+)> geofenceBreachCallback;
+
+/* Used for addGeofences API, optional can be NULL
+       geofenceStatusCallback is called when any number of geofences have a status change */
+typedef std::function<void(
+    GeofenceStatusNotification geofenceStatusNotification
+)> geofenceStatusCallback;
+
+/* Network Initiated request, optional can be NULL
+   This callback should be responded to by calling gnssNiResponse */
+typedef std::function<void(
+    uint32_t id, // id that should be used to respond by calling gnssNiResponse
+    GnssNiNotification gnssNiNotification
+)> gnssNiCallback;
+
+/* Gives GNSS SV information, optional can be NULL
+    gnssSvCallback is called only during a tracking session
+    broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    GnssSvNotification gnssSvNotification
+)> gnssSvCallback;
+
+/* Gives GNSS NMEA data, optional can be NULL
+    gnssNmeaCallback is called only during a tracking session
+    broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    GnssNmeaNotification gnssNmeaNotification
+)> gnssNmeaCallback;
+
+/* Gives GNSS data, optional can be NULL
+    gnssDataCallback is called only during a tracking session
+    broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    GnssDataNotification gnssDataNotification
+)> gnssDataCallback;
+
+/* Gives GNSS Measurements information, optional can be NULL
+    gnssMeasurementsCallback is called only during a tracking session
+    broadcasted to all clients, no matter if a session has started by client */
+typedef std::function<void(
+    GnssMeasurementsNotification gnssMeasurementsNotification
+)> gnssMeasurementsCallback;
+
+/* Provides the current GNSS configuration to the client */
+typedef std::function<void(
+    uint32_t session_id,
+    const GnssConfig& config
+)> gnssConfigCallback;
+
+/* LocationSystemInfoCb is for receiving rare occuring location
+   system information update. optional, can be NULL.
+*/
+typedef std::function<void(
+    LocationSystemInfo locationSystemInfo
+)> locationSystemInfoCallback;
+
+typedef std::function<void(
+)> locationApiDestroyCompleteCallback;
+
+typedef uint16_t LocationAdapterTypeMask;
+typedef enum {
+    LOCATION_ADAPTER_GNSS_TYPE_BIT      = (1<<0), // adapter type is GNSS
+    LOCATION_ADAPTER_BATCHING_TYPE_BIT  = (1<<1), // adapter type is BATCHING
+    LOCATION_ADAPTER_GEOFENCE_TYPE_BIT  = (1<<2)  // adapter type is geo fence
+} LocationAdapterTypeBits;
+
+typedef struct {
+    uint32_t size; // set to sizeof(LocationCallbacks)
+    capabilitiesCallback capabilitiesCb;             // mandatory
+    responseCallback responseCb;                     // mandatory
+    collectiveResponseCallback collectiveResponseCb; // mandatory
+    trackingCallback trackingCb;                     // optional
+    batchingCallback batchingCb;                     // optional
+    geofenceBreachCallback geofenceBreachCb;         // optional
+    geofenceStatusCallback geofenceStatusCb;         // optional
+    gnssLocationInfoCallback gnssLocationInfoCb;     // optional
+    gnssNiCallback gnssNiCb;                         // optional
+    gnssSvCallback gnssSvCb;                         // optional
+    gnssNmeaCallback gnssNmeaCb;                     // optional
+    gnssDataCallback gnssDataCb;                     // optional
+    gnssMeasurementsCallback gnssMeasurementsCb;     // optional
+    batchingStatusCallback batchingStatusCb;         // optional
+    locationSystemInfoCallback locationSystemInfoCb; // optional
+    engineLocationsInfoCallback engineLocationsInfoCb;     // optional
+} LocationCallbacks;
+
+typedef struct {
+    uint32_t size;                        // set to sizeof
+    double x;
+    double xUncertainty;
+    double y;
+    double yUncertainty;
+    double z;
+    double zUncertainty;
+} GnssCoordinate;
+
+typedef struct {
+    uint32_t size;                        // set to sizeof
+    double carrierFrequencyMHz;
+    GnssCoordinate phaseCenterOffsetCoordinateMillimeters;
+    std::vector<std::vector<double>> phaseCenterVariationCorrectionMillimeters;
+    std::vector<std::vector<double>> phaseCenterVariationCorrectionUncertaintyMillimeters;
+    std::vector<std::vector<double>> signalGainCorrectionDbi;
+    std::vector<std::vector<double>> signalGainCorrectionUncertaintyDbi;
+} GnssAntennaInformation;
+
+typedef struct {
+    uint32_t size;                        // set to sizeof
+    bool requiresNmeaLocation;
+    std::string hostNameOrIp;    // null terminated string
+    std::string mountPoint;      // null terminated string
+    std::string username;        // null terminated string
+    std::string password;        // null terminated string
+    uint32_t port;
+    bool useSSL;
+} GnssNtripConnectionParams;
+
+typedef struct {
+    uint64_t meQtimer1;
+    uint64_t meQtimer2;
+    uint64_t meQtimer3;
+    uint64_t peQtimer1;
+    uint64_t peQtimer2;
+    uint64_t peQtimer3;
+    uint64_t smQtimer1;
+    uint64_t smQtimer2;
+    uint64_t smQtimer3;
+    uint64_t locMwQtimer;
+    uint64_t hlosQtimer1;
+    uint64_t hlosQtimer2;
+    uint64_t hlosQtimer3;
+    uint64_t hlosQtimer4;
+    uint64_t hlosQtimer5;
+} GnssLatencyInfo;
+
+#endif /* LOCATIONDATATYPES_H */
diff --git a/gps/location/Makefile.am b/gps/location/Makefile.am
new file mode 100644
index 0000000..6a5a750
--- /dev/null
+++ b/gps/location/Makefile.am
@@ -0,0 +1,44 @@
+ACLOCAL_AMFLAGS = -I m4
+
+AM_CFLAGS = \
+     -I./ \
+     -I../utils \
+     $(LOCPLA_CFLAGS) \
+     $(GPSUTILS_CFLAGS) \
+     -std=c++11
+
+liblocation_api_la_SOURCES = \
+    LocationAPI.cpp \
+    LocationAPIClientBase.cpp
+
+if USE_EXTERNAL_AP
+AM_CFLAGS += -DFEATURE_EXTERNAL_AP
+endif
+
+if USE_GLIB
+liblocation_api_la_CFLAGS = -DUSE_GLIB $(AM_CFLAGS) @GLIB_CFLAGS@
+liblocation_api_la_LDFLAGS = -lstdc++ -Wl,-z,defs -lpthread @GLIB_LIBS@ -shared -version-info 1:0:0
+liblocation_api_la_CPPFLAGS = -DUSE_GLIB $(AM_CFLAGS) $(AM_CPPFLAGS) @GLIB_CFLAGS@
+else
+liblocation_api_la_CFLAGS = $(AM_CFLAGS)
+liblocation_api_la_LDFLAGS = -Wl,-z,defs -lpthread -shared -version-info 1:0:0
+liblocation_api_la_CPPFLAGS = $(AM_CFLAGS) $(AM_CPPFLAGS)
+endif
+
+liblocation_api_la_LIBADD = -lstdc++ -ldl $(GPSUTILS_LIBS)
+
+library_include_HEADERS = \
+    LocationAPI.h \
+    LocationAPIClientBase.h \
+    location_interface.h \
+    LocationDataTypes.h \
+    ILocationAPI.h
+
+#Create and Install libraries
+lib_LTLIBRARIES = liblocation_api.la
+
+library_includedir = $(pkgincludedir)
+
+pkgconfigdir = $(libdir)/pkgconfig
+pkgconfig_DATA = location-api.pc
+EXTRA_DIST = $(pkgconfig_DATA)
diff --git a/gps/location/configure.ac b/gps/location/configure.ac
new file mode 100644
index 0000000..f8376f5
--- /dev/null
+++ b/gps/location/configure.ac
@@ -0,0 +1,95 @@
+# configure.ac -- Autoconf script for gps location-api-iface
+#
+# Process this file with autoconf to produce a configure script
+
+# Requires autoconf tool later than 2.61
+AC_PREREQ(2.61)
+# Initialize the gps location-api-iface package version 1.0.0
+AC_INIT([location-api-iface],1.0.0)
+# Does not strictly follow GNU Coding standards
+AM_INIT_AUTOMAKE([foreign subdir-objects])
+# Disables auto rebuilding of configure, Makefile.ins
+AM_MAINTAINER_MODE
+# Verifies the --srcdir is correct by checking for the path
+AC_CONFIG_SRCDIR([location-api.pc.in])
+# defines some macros variable to be included by source
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_MACRO_DIR([m4])
+
+# Checks for programs.
+AC_PROG_LIBTOOL
+AC_PROG_CXX
+AC_PROG_CC
+AM_PROG_CC_C_O
+AC_PROG_AWK
+AC_PROG_CPP
+AC_PROG_INSTALL
+AC_PROG_LN_S
+AC_PROG_MAKE_SET
+PKG_PROG_PKG_CONFIG
+
+# Checks for libraries.
+PKG_CHECK_MODULES([GPSUTILS], [gps-utils])
+AC_SUBST([GPSUTILS_CFLAGS])
+AC_SUBST([GPSUTILS_LIBS])
+
+AC_ARG_WITH([core_includes],
+      AC_HELP_STRING([--with-core-includes=@<:@dir@:>@],
+         [Specify the location of the core headers]),
+      [core_incdir=$withval],
+      with_core_includes=no)
+
+if test "x$with_core_includes" != "xno"; then
+   CPPFLAGS="${CPPFLAGS} -I${core_incdir}"
+fi
+
+AC_ARG_WITH([locpla_includes],
+      AC_HELP_STRING([--with-locpla-includes=@<:@dir@:>@],
+        [Specify the path to locpla-includes in loc-pla_git.bb]),
+      [locpla_incdir=$withval],
+      with_locpla_includes=no)
+
+if test "x${with_locpla_includes}" != "xno"; then
+   AC_SUBST(LOCPLA_CFLAGS, "-I${locpla_incdir}")
+fi
+
+AC_SUBST([CPPFLAGS])
+
+AC_ARG_WITH([glib],
+      AC_HELP_STRING([--with-glib],
+         [enable glib, building HLOS systems which use glib]))
+
+if (test "x${with_glib}" = "xyes"); then
+        AC_DEFINE(ENABLE_USEGLIB, 1, [Define if HLOS systems uses glib])
+        PKG_CHECK_MODULES(GTHREAD, gthread-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GThread >= 2.16 is required))
+        PKG_CHECK_MODULES(GLIB, glib-2.0 >= 2.16, dummy=yes,
+                                AC_MSG_ERROR(GLib >= 2.16 is required))
+        GLIB_CFLAGS="$GLIB_CFLAGS $GTHREAD_CFLAGS"
+        GLIB_LIBS="$GLIB_LIBS $GTHREAD_LIBS"
+
+        AC_SUBST(GLIB_CFLAGS)
+        AC_SUBST(GLIB_LIBS)
+fi
+
+AM_CONDITIONAL(USE_GLIB, test "x${with_glib}" = "xyes")
+
+# External AP
+AC_ARG_WITH([external_ap],
+    AC_HELP_STRING([--with-external_ap=@<:@dir@:>@],
+        [Using External Application Processor]),
+    [],
+    with_external_ap=no)
+
+if test "x$with_external_ap" != "xno"; then
+    CPPFLAGS="${CPPFLAGS} -DFEATURE_EXTERNAL_AP"
+fi
+
+AM_CONDITIONAL(USE_EXTERNAL_AP, test "x${with_external_ap}" = "xyes")
+
+AC_CONFIG_FILES([ \
+        Makefile \
+        location-api.pc \
+        ])
+
+AC_OUTPUT
diff --git a/gps/location/location-api.pc.in b/gps/location/location-api.pc.in
new file mode 100644
index 0000000..c7b146a
--- /dev/null
+++ b/gps/location/location-api.pc.in
@@ -0,0 +1,10 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+
+Name: location-api
+Description: Location API
+Version: @VERSION
+Libs: -L${libdir} -llocation_api
+Cflags: -I${includedir}/location-api
diff --git a/gps/location/location_interface.h b/gps/location/location_interface.h
new file mode 100644
index 0000000..69d4f0c
--- /dev/null
+++ b/gps/location/location_interface.h
@@ -0,0 +1,144 @@
+/* Copyright (c) 2017-2020 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef LOCATION_INTERFACE_H
+#define LOCATION_INTERFACE_H
+
+#include <LocationAPI.h>
+#include <gps_extended_c.h>
+#include <functional>
+
+/* Used for callback to deliver GNSS energy consumed */
+/** @fn
+    @brief Used by query API that retrieves energy consumed by
+           modem GNSS engine.
+
+    @param gnssEnergyConsumedFromFirstBoot:
+            Energy consumed by the GNSS engine since the first bootup
+            in units of 0.1 milli watt seconds.
+            A value of 0xffffffffffffffff indicates an invalid reading.
+*/
+typedef std::function<void(
+    uint64_t gnssEnergyConsumedFromFirstBoot
+)> GnssEnergyConsumedCallback;
+
+typedef void (*removeClientCompleteCallback)(LocationAPI* client);
+
+struct GnssInterface {
+    size_t size;
+    void (*initialize)(void);
+    void (*deinitialize)(void);
+    void (*addClient)(LocationAPI* client, const LocationCallbacks& callbacks);
+    void (*removeClient)(LocationAPI* client, removeClientCompleteCallback rmClientCb);
+    void (*requestCapabilities)(LocationAPI* client);
+    uint32_t (*startTracking)(LocationAPI* client, TrackingOptions&);
+    void (*updateTrackingOptions)(LocationAPI* client, uint32_t id, TrackingOptions&);
+    void (*stopTracking)(LocationAPI* client, uint32_t id);
+    void (*gnssNiResponse)(LocationAPI* client, uint32_t id, GnssNiResponse response);
+    void (*setControlCallbacks)(LocationControlCallbacks& controlCallbacks);
+    uint32_t (*enable)(LocationTechnologyType techType);
+    void (*disable)(uint32_t id);
+    uint32_t* (*gnssUpdateConfig)(const GnssConfig& config);
+    uint32_t* (*gnssGetConfig)(GnssConfigFlagsMask config);
+    void (*gnssUpdateSvTypeConfig)(GnssSvTypeConfig& config);
+    void (*gnssGetSvTypeConfig)(GnssSvTypeConfigCallback& callback);
+    void (*gnssResetSvTypeConfig)();
+    uint32_t (*gnssDeleteAidingData)(GnssAidingData& data);
+    void (*gnssUpdateXtraThrottle)(const bool enabled);
+    void (*injectLocation)(double latitude, double longitude, float accuracy);
+    void (*injectTime)(int64_t time, int64_t timeReference, int32_t uncertainty);
+    void (*agpsInit)(const AgpsCbInfo& cbInfo);
+    void (*agpsDataConnOpen)(AGpsExtType agpsType, const char* apnName, int apnLen, int ipType);
+    void (*agpsDataConnClosed)(AGpsExtType agpsType);
+    void (*agpsDataConnFailed)(AGpsExtType agpsType);
+    void (*getDebugReport)(GnssDebugReport& report);
+    void (*updateConnectionStatus)(bool connected, int8_t type, bool roaming,
+                                   NetworkHandle networkHandle, std::string& apn);
+    void (*odcpiInit)(const OdcpiRequestCallback& callback, OdcpiPrioritytype priority);
+    void (*odcpiInject)(const Location& location);
+    void (*blockCPI)(double latitude, double longitude, float accuracy,
+                     int blockDurationMsec, double latLonDiffThreshold);
+    void (*getGnssEnergyConsumed)(GnssEnergyConsumedCallback energyConsumedCb);
+    void (*enableNfwLocationAccess)(bool enable);
+    void (*nfwInit)(const NfwCbInfo& cbInfo);
+    void (*getPowerStateChanges)(std::function<void(bool)> powerStateCb);
+    void (*injectLocationExt)(const GnssLocationInfoNotification &locationInfo);
+    void (*updateBatteryStatus)(bool charging);
+    void (*updateSystemPowerState)(PowerStateType systemPowerState);
+    uint32_t (*setConstrainedTunc) (bool enable, float tuncConstraint, uint32_t energyBudget);
+    uint32_t (*setPositionAssistedClockEstimator) (bool enable);
+    uint32_t (*gnssUpdateSvConfig)(const GnssSvTypeConfig& constellationEnablementConfig,
+                                   const GnssSvIdConfig&   blacklistSvConfig);
+    uint32_t (*configLeverArm)(const LeverArmConfigInfo& configInfo);
+    bool (*measCorrInit)(const measCorrSetCapabilitiesCb setCapabilitiesCb);
+    bool (*measCorrSetCorrections)(const GnssMeasurementCorrections gnssMeasCorr);
+    void (*measCorrClose)();
+    uint32_t (*antennaInfoInit)(const antennaInfoCb antennaInfoCallback);
+    void (*antennaInfoClose) ();
+    uint32_t (*configRobustLocation)(bool enable, bool enableForE911);
+    uint32_t (*configMinGpsWeek)(uint16_t minGpsWeek);
+    uint32_t (*configDeadReckoningEngineParams)(const DeadReckoningEngineConfig& dreConfig);
+    void (*updateNTRIPGGAConsent)(bool consentAccepted);
+    void (*enablePPENtripStream)(const GnssNtripConnectionParams& params, bool enableRTKEngine);
+    void (*disablePPENtripStream)();
+    uint32_t (*gnssUpdateSecondaryBandConfig)(const GnssSvTypeConfig& secondaryBandConfig);
+    uint32_t (*gnssGetSecondaryBandConfig)();
+    void (*resetNetworkInfo)();
+    uint32_t (*configEngineRunState)(PositioningEngineMask engType,
+                                     LocEngineRunState engState);
+};
+
+struct BatchingInterface {
+    size_t size;
+    void (*initialize)(void);
+    void (*deinitialize)(void);
+    void (*addClient)(LocationAPI* client, const LocationCallbacks& callbacks);
+    void (*removeClient)(LocationAPI* client, removeClientCompleteCallback rmClientCb);
+    void (*requestCapabilities)(LocationAPI* client);
+    uint32_t (*startBatching)(LocationAPI* client, BatchingOptions&);
+    void (*stopBatching)(LocationAPI* client, uint32_t id);
+    void (*updateBatchingOptions)(LocationAPI* client, uint32_t id, BatchingOptions&);
+    void (*getBatchedLocations)(LocationAPI* client, uint32_t id, size_t count);
+};
+
+struct GeofenceInterface {
+    size_t size;
+    void (*initialize)(void);
+    void (*deinitialize)(void);
+    void (*addClient)(LocationAPI* client, const LocationCallbacks& callbacks);
+    void (*removeClient)(LocationAPI* client, removeClientCompleteCallback rmClientCb);
+    void (*requestCapabilities)(LocationAPI* client);
+    uint32_t* (*addGeofences)(LocationAPI* client, size_t count, GeofenceOption*, GeofenceInfo*);
+    void (*removeGeofences)(LocationAPI* client, size_t count, uint32_t* ids);
+    void (*modifyGeofences)(LocationAPI* client, size_t count, uint32_t* ids,
+                            GeofenceOption* options);
+    void (*pauseGeofences)(LocationAPI* client, size_t count, uint32_t* ids);
+    void (*resumeGeofences)(LocationAPI* client, size_t count, uint32_t* ids);
+};
+
+#endif /* LOCATION_INTERFACE_H */