Function LightSemaphore_Acquire

libctru/source/synchronization.c:365–392

}

void LightSemaphore_Acquire(LightSemaphore* semaphore, s32 count)
{
	s32 old_count;
	s16 num_threads_acq;

	do
	{
		for (;;)
		{
			old_count = __ldrex(&semaphore->current_count);
			if (old_count >= count)
				break;
			__clrex();

			do
				num_threads_acq = (s16)__ldrexh((u16 *)&semaphore->num_threads_acq);
			while (__strexh((u16 *)&semaphore->num_threads_acq, num_threads_acq + 1));

			syncArbitrateAddress(&semaphore->current_count, ARBITRATION_WAIT_IF_LESS_THAN, count);

			do
				num_threads_acq = (s16)__ldrexh((u16 *)&semaphore->num_threads_acq);
			while (__strexh((u16 *)&semaphore->num_threads_acq, num_threads_acq - 1));
		}
	} while (__strex(&semaphore->current_count, old_count - count));

	__dmb();
}

int LightSemaphore_TryAcquire(LightSemaphore* semaphore, s32 count)
{