80 lines
1.7 KiB
C
80 lines
1.7 KiB
C
#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) return EINVAL;
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return 0;
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}
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int pthread_barrierattr_init(pthread_barrierattr_t *attr)
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{
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if (!attr) return EINVAL;
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*attr = PTHREAD_PROCESS_PRIVATE;
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return 0;
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}
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int pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr, int *pshared)
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{
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if (!attr) return EINVAL;
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*pshared = (int)*attr;
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return 0;
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}
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int pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared)
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{
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if (!attr) return EINVAL;
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if (pshared == PTHREAD_PROCESS_PRIVATE) attr = PTHREAD_PROCESS_PRIVATE;
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return EINVAL;
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}
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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) 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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int pthread_barrier_init(pthread_barrier_t *barrier,
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const pthread_barrierattr_t *attr, unsigned count)
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{
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rt_err_t result;
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if (!barrier) return EINVAL;
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if (attr &&(*attr != PTHREAD_PROCESS_PRIVATE)) 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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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) return EINVAL;
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result = pthread_mutex_lock(&(barrier->mutex));
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if (result != 0) return EINVAL;
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if (barrier->count == 0) 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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