C++ (Cpp) mm_memory_fence Examples

Example #1

mm_event_dispatch_advance_epoch(struct mm_event_dispatch *dispatch)
{
	ENTER();

	uint32_t epoch = mm_memory_load(dispatch->reclaim_epoch);
	bool rc = mm_event_dispatch_check_epoch(dispatch, epoch);
	if (rc) {
		mm_memory_fence(); // TODO: load_store fence
		mm_memory_store(dispatch->reclaim_epoch, epoch + 1);
		DEBUG("advance epoch %u", epoch + 1);
	}

	LEAVE();
	return rc;
}

Example #2

File: barrier.c Project: ademakov/MainMemory

mm_thread_barrier_wait(struct mm_thread_barrier *const barrier, struct mm_thread_barrier_local *local)
{
	uint32_t sense = ~local->sense;

	if (mm_atomic_uint32_dec_and_test(&barrier->value) == 0) {
		mm_memory_store(barrier->value, barrier->count);
		mm_memory_store_fence();
		mm_memory_store(barrier->sense, sense);
	} else {
		mm_memory_fence(); // TODO: atomic_load fence
		while (mm_memory_load(barrier->sense) != sense)
			mm_cpu_backoff();
	}

	local->sense = sense;
}