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/* Copyright (c) 2015, 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.
*
*/
#include <sys/prctl.h>
#include <LocThread.h>
#include <string.h>
#include <string>
#include <thread>
#include <loc_pla.h>
using std::weak_ptr;
using std::shared_ptr;
using std::thread;
using std::string;
namespace loc_util {
class LocThreadDelegate {
static const char defaultThreadName[];
weak_ptr<LocRunnable> mRunnable;
thread mThread;
LocThreadDelegate(const string tName, shared_ptr<LocRunnable> r);
public:
~LocThreadDelegate() {
shared_ptr<LocRunnable> runnable = mRunnable.lock();
if (nullptr != runnable) {
runnable->interrupt();
}
}
inline static LocThreadDelegate* create(const char* tName, shared_ptr<LocRunnable> runnable);
};
const char LocThreadDelegate::defaultThreadName[] = "LocThread";
LocThreadDelegate* LocThreadDelegate::create(const char* tName, shared_ptr<LocRunnable> runnable) {
LocThreadDelegate* threadDelegate = nullptr;
if (nullptr != runnable) {
if (!tName) {
tName = defaultThreadName;
}
char lname[16];
auto nameSize = strlen(tName) + 1;
int len = std::min(sizeof(lname), nameSize) - 1;
memcpy(lname, tName, len);
lname[len] = 0;
threadDelegate = new LocThreadDelegate(lname, runnable);
}
return threadDelegate;
}
LocThreadDelegate::LocThreadDelegate(const string tName, shared_ptr<LocRunnable> runnable) :
mRunnable(runnable),
mThread([tName, runnable] {
prctl(PR_SET_NAME, tName.c_str(), 0, 0, 0);
runnable->prerun();
while (runnable->run());
runnable->postrun();
}) {
mThread.detach();
}
bool LocThread::start(const char* tName, shared_ptr<LocRunnable> runnable) {
bool success = false;
if (!mThread) {
mThread = LocThreadDelegate::create(tName, runnable);
// true only if thread is created successfully
success = (NULL != mThread);
}
return success;
}
void LocThread::stop() {
if (nullptr != mThread) {
delete mThread;
mThread = nullptr;
}
}
} // loc_util
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