137 lines
2.6 KiB
C
Executable File
137 lines
2.6 KiB
C
Executable File
/*
|
|
* Copyright (c) 2006-2018, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2010-10-26 Bernard the first version
|
|
*/
|
|
|
|
#include <pthread.h>
|
|
|
|
int pthread_barrierattr_destroy(pthread_barrierattr_t *attr)
|
|
{
|
|
if (!attr)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
RTM_EXPORT(pthread_barrierattr_destroy);
|
|
|
|
int pthread_barrierattr_init(pthread_barrierattr_t *attr)
|
|
{
|
|
if (!attr)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
*attr = PTHREAD_PROCESS_PRIVATE;
|
|
|
|
return 0;
|
|
}
|
|
RTM_EXPORT(pthread_barrierattr_init);
|
|
|
|
int pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr,
|
|
int *pshared)
|
|
{
|
|
if (!attr)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
*pshared = (int) * attr;
|
|
|
|
return 0;
|
|
}
|
|
RTM_EXPORT(pthread_barrierattr_getpshared);
|
|
|
|
int pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
|
|
{
|
|
if (!attr)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
if (pshared == PTHREAD_PROCESS_PRIVATE)
|
|
{
|
|
attr = PTHREAD_PROCESS_PRIVATE;
|
|
}
|
|
|
|
return EINVAL;
|
|
}
|
|
RTM_EXPORT(pthread_barrierattr_setpshared);
|
|
|
|
int pthread_barrier_destroy(pthread_barrier_t *barrier)
|
|
{
|
|
rt_err_t result;
|
|
|
|
if (!barrier)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
result = pthread_cond_destroy(&(barrier->cond));
|
|
|
|
return result;
|
|
}
|
|
RTM_EXPORT(pthread_barrier_destroy);
|
|
|
|
int pthread_barrier_init(pthread_barrier_t *barrier,
|
|
const pthread_barrierattr_t *attr,
|
|
unsigned count)
|
|
{
|
|
if (!barrier)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
if (attr && (*attr != PTHREAD_PROCESS_PRIVATE))
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
barrier->count = count;
|
|
pthread_cond_init(&(barrier->cond), NULL);
|
|
pthread_mutex_init(&(barrier->mutex), NULL);
|
|
|
|
return 0;
|
|
}
|
|
RTM_EXPORT(pthread_barrier_init);
|
|
|
|
int pthread_barrier_wait(pthread_barrier_t *barrier)
|
|
{
|
|
rt_err_t result;
|
|
if (!barrier)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
result = pthread_mutex_lock(&(barrier->mutex));
|
|
if (result != 0)
|
|
{
|
|
return EINVAL;
|
|
}
|
|
|
|
if (barrier->count == 0)
|
|
{
|
|
result = EINVAL;
|
|
}
|
|
else
|
|
{
|
|
barrier->count -= 1;
|
|
if (barrier->count == 0) /* broadcast condition */
|
|
{
|
|
pthread_cond_broadcast(&(barrier->cond));
|
|
}
|
|
else
|
|
{
|
|
pthread_cond_wait(&(barrier->cond), &(barrier->mutex));
|
|
}
|
|
}
|
|
|
|
pthread_mutex_unlock(&(barrier->mutex));
|
|
|
|
return result;
|
|
}
|
|
RTM_EXPORT(pthread_barrier_wait);
|
|
|