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