ObjFW  Diff

	/* Avoid atomic operations in case it's already done. */
	if (*control == 2)
		return;

	if (OFAtomicIntCompareAndSwap(control, 0, 1)) {
		func();

		of_memory_barrier();
		OFMemoryBarrier();

		OFAtomicIntIncrease(control);
	} else
		while (*control == 1)
			OFYieldThread();
#elif defined(OF_AMIGAOS)
	bool run = false;