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#include <errno.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <sys/queue.h>
#include "queue.h"
#include "util.h"
static void queue_push(struct queue *queue, struct job *job);
void *queue_thread_entry(void *queue_thread)
{
struct queue_thread *qt = queue_thread;
struct job *job = NULL;
int ret = 0;
while (true) {
ret = job_read(qt->stream, &job);
if (ret == JOB_READ_EOF) {
qt->queue->state = Q_ITS_OVER;
sem_post(&qt->queue->sem);
ret = 0;
break;
} else if (ret == JOB_READ_EVAL_ERR ||
ret == JOB_READ_JSON_INVAL) {
continue;
} else if (ret == JOB_READ_SUCCESS) {
queue_push(qt->queue, job);
} else {
break;
}
}
pthread_exit(NULL);
}
int queue_pop(struct queue *queue, struct job **job)
{
struct job *j = CIRCLEQ_FIRST(&queue->jobs);
if (CIRCLEQ_EMPTY(&queue->jobs)) {
print_err("%s", "Empty queue");
return -EPERM;
}
pthread_mutex_lock(&queue->mutex);
CIRCLEQ_REMOVE(&queue->jobs, j, clist);
pthread_mutex_unlock(&queue->mutex);
*job = j;
return 0;
}
static void queue_push(struct queue *queue, struct job *job)
{
pthread_mutex_lock(&queue->mutex);
CIRCLEQ_INSERT_TAIL(&queue->jobs, job, clist);
pthread_mutex_unlock(&queue->mutex);
sem_post(&queue->sem);
}
void queue_thread_free(struct queue_thread *queue_thread)
{
struct job *job;
int ret;
if (queue_thread == NULL)
return;
CIRCLEQ_FOREACH (job, &queue_thread->queue->jobs, clist) {
CIRCLEQ_REMOVE(&queue_thread->queue->jobs, job, clist);
free(job);
}
ret = sem_destroy(&queue_thread->queue->sem);
if (ret < 0)
print_err("%s", strerror(errno));
ret = pthread_mutex_destroy(&queue_thread->queue->mutex);
if (ret < 0)
print_err("%s", strerror(errno));
free(queue_thread->queue);
fclose(queue_thread->stream);
}
int queue_thread_new(struct queue_thread **queue_thread, FILE *stream)
{
int ret = 0;
struct queue_thread *qt = NULL;
qt = malloc(sizeof(*qt));
if (qt == NULL) {
print_err("%s", strerror(errno));
return -errno;
}
qt->stream = stream;
qt->queue = malloc(sizeof(*qt->queue));
if (qt->queue == NULL) {
print_err("%s", strerror(errno));
ret = -errno;
goto out_free;
}
qt->queue->state = Q_SEM_WAIT;
ret = sem_init(&qt->queue->sem, 0, 0);
if (ret < 0) {
print_err("%s", strerror(errno));
ret = -errno;
goto out_free;
}
CIRCLEQ_INIT(&qt->queue->jobs);
pthread_mutex_init(&qt->queue->mutex, NULL);
out_free:
if (ret < 0)
free(qt);
else
*queue_thread = qt;
return ret;
}
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