/*
* Copyright (c) 2018 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include <string.h>
#include "vpx/vpx_integer.h"
#include "vpx_util/vpx_pthread.h"
#include "vp9/decoder/vp9_job_queue.h"
void vp9_jobq_init(JobQueueRowMt *jobq, uint8_t *buf, size_t buf_size) {
#if CONFIG_MULTITHREAD
pthread_mutex_init(&jobq->mutex, NULL);
pthread_cond_init(&jobq->cond, NULL);
#endif
jobq->buf_base = buf;
jobq->buf_wr = buf;
jobq->buf_rd = buf;
jobq->buf_end = buf + buf_size;
jobq->terminate = 0;
}
void vp9_jobq_reset(JobQueueRowMt *jobq) {
#if CONFIG_MULTITHREAD
pthread_mutex_lock(&jobq->mutex);
#endif
jobq->buf_wr = jobq->buf_base;
jobq->buf_rd = jobq->buf_base;
jobq->terminate = 0;
#if CONFIG_MULTITHREAD
pthread_mutex_unlock(&jobq->mutex);
#endif
}
void vp9_jobq_deinit(JobQueueRowMt *jobq) {
vp9_jobq_reset(jobq);
#if CONFIG_MULTITHREAD
pthread_mutex_destroy(&jobq->mutex);
pthread_cond_destroy(&jobq->cond);
#endif
}
void vp9_jobq_terminate(JobQueueRowMt *jobq) {
#if CONFIG_MULTITHREAD
pthread_mutex_lock(&jobq->mutex);
#endif
jobq->terminate = 1;
#if CONFIG_MULTITHREAD
pthread_cond_broadcast(&jobq->cond);
pthread_mutex_unlock(&jobq->mutex);
#endif
}
int vp9_jobq_queue(JobQueueRowMt *jobq,
void *job, size_t job_size) {
int ret = 0;
#if CONFIG_MULTITHREAD
pthread_mutex_lock(&jobq->mutex);
#endif
if (jobq->buf_end >= jobq->buf_wr + job_size) {
memcpy(jobq->buf_wr, job, job_size);
jobq->buf_wr = jobq->buf_wr + job_size;
#if CONFIG_MULTITHREAD
pthread_cond_signal(&jobq->cond);
#endif
ret = 0;
}
else {
/* Wrap around case is not supported */
assert(0);
ret = 1;
}
#if CONFIG_MULTITHREAD
pthread_mutex_unlock(&jobq->mutex);
#endif
return ret;
}
int vp9_jobq_dequeue(JobQueueRowMt *jobq,
void *job, size_t job_size,
int blocking) {
int ret = 0;
#if CONFIG_MULTITHREAD
pthread_mutex_lock(&jobq->mutex);
#endif
if (jobq->buf_end >= jobq->buf_rd + job_size) {
while (1) {
if (jobq->buf_wr >= jobq->buf_rd + job_size) {
memcpy(job, jobq->buf_rd, job_size);
jobq->buf_rd = jobq->buf_rd + job_size;
ret = 0;
break;
}
else {
/* If all the entries have been dequeued, then break and return */
if (jobq->terminate == 1) {
ret = 1;
break;
}
if (blocking == 1) {
#if CONFIG_MULTITHREAD
pthread_cond_wait(&jobq->cond, &jobq->mutex);
#endif
}
else {
/* If there is no job available,
* and this is non blocking call then return fail */
ret = 1;
break;
}
}
}
}
else {
/* Wrap around case is not supported */
ret = 1;
}
#if CONFIG_MULTITHREAD
pthread_mutex_unlock(&jobq->mutex);
#endif
return ret;
}
