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#include "Thread.h"
#include <stdlib.h>
#include <errno.h>
#include <time.h>
BH_Semaphore *BH_SemaphoreNew(int value)
{
BH_Semaphore *semaphore;
/* Allocate space for mutex and initialize it */
semaphore = malloc(sizeof(BH_Semaphore));
if (semaphore && sem_init(&semaphore->handle, 0, value))
{
free(semaphore);
return NULL;
}
return semaphore;
}
void BH_SemaphoreFree(BH_Semaphore *semaphore)
{
sem_destroy(&semaphore->handle);
free(semaphore);
}
int BH_SemaphorePost(BH_Semaphore *semaphore)
{
if (sem_post(&semaphore->handle))
return BH_ERROR;
return BH_OK;
}
int BH_SemaphoreWait(BH_Semaphore *semaphore)
{
if (sem_wait(&semaphore->handle))
return BH_ERROR;
return BH_OK;
}
int BH_SemaphoreWaitTry(BH_Semaphore *semaphore)
{
if (sem_trywait(&semaphore->handle))
return BH_ERROR;
return BH_OK;
}
int BH_SemaphoreWaitFor(BH_Semaphore *semaphore,
uint32_t timeout)
{
struct timespec ts;
ts.tv_sec = timeout / 1000;
ts.tv_nsec = (timeout - ts.tv_sec * 1000) * 1000000;
switch (sem_timedwait(&semaphore->handle, &ts))
{
case 0: return BH_OK;
case ETIMEDOUT: return BH_TIMEOUT;
default: return BH_ERROR;
}
}
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