Cameron Gutman 014f507c40 Use specific acquire and release variants of InterlockedExchange on ARM ... _InterlockedExchange_rel() is required for correctness on ARM because the _ReadWriteBarrier() macro is only a compiler memory barrier, not a hardware memory barrier. Due to ARM's relaxed memory model, this means the '*lock = 0' write may be observed before the operations inside the lock, causing possible corruption of data protected by the lock. _InterlockedExchange_acq() is more efficient on ARM because it avoids an expensive full memory barrier that _InterlockedExchange() does.		2021-01-03 12:13:40 -06:00
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SDL_atomic.c	Updated copyright for 2021	2021-01-02 10:25:38 -08:00
SDL_spinlock.c	Use specific acquire and release variants of InterlockedExchange on ARM	2021-01-03 12:13:40 -06:00