ObjFW  Diff

    void *_Nullable o, void *_Nullable n)
{
	return __atomic_compare_exchange(p, &o, &n, false,
	    __ATOMIC_RELAXED, __ATOMIC_RELAXED);
}

static OF_INLINE void
of_memory_barrier_full(void)
OFMemoryBarrier(void)
{
	__atomic_thread_fence(__ATOMIC_SEQ_CST);
}

static OF_INLINE void
of_memory_barrier_acquire(void)
OFAcquireMemoryBarrier(void)
{
	__atomic_thread_fence(__ATOMIC_ACQUIRE);
}

static OF_INLINE void
of_memory_barrier_release(void)
OFReleaseMemoryBarrier(void)
{
	__atomic_thread_fence(__ATOMIC_RELEASE);
}