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Optimize semaphore wait with zero timeout on POSIX
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@ -140,6 +140,8 @@ bool Semaphore::wait(unsigned int time_ms)
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errno = EINVAL;
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}
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# else
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int ret;
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if (time_ms > 0) {
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struct timespec wait_time;
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struct timeval now;
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@ -152,10 +154,13 @@ bool Semaphore::wait(unsigned int time_ms)
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wait_time.tv_sec = (time_ms / 1000) + (wait_time.tv_nsec / (1000 * 1000 * 1000)) + now.tv_sec;
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wait_time.tv_nsec %= 1000 * 1000 * 1000;
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int ret = sem_timedwait(&semaphore, &wait_time);
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ret = sem_timedwait(&semaphore, &wait_time);
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} else {
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ret = sem_trywait(&semaphore);
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}
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# endif
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assert(!ret || (errno == ETIMEDOUT || errno == EINTR));
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assert(!ret || (errno == ETIMEDOUT || errno == EINTR || errno == EAGAIN));
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return !ret;
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#endif
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}
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