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atomic: Use acquire/release InterlockedExchange intrinsics on ARM64EC

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Cameron Gutman
2026-04-24 18:26:10 -05:00
parent 74a746281f
commit 0220a41a2e
1 changed files with 2 additions and 2 deletions
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src/atomic/SDL_spinlock.c
+2 -2
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@@ -50,7 +50,7 @@ bool SDL_TryLockSpinlock(SDL_SpinLock *lock)
#if defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET) #if defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
return __sync_lock_test_and_set(lock, 1) == 0; return __sync_lock_test_and_set(lock, 1) == 0;
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64)) #elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64) || defined(_M_ARM64EC))
SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long)); SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
return _InterlockedExchange_acq((long *)lock, 1) == 0; return _InterlockedExchange_acq((long *)lock, 1) == 0;
@@ -167,7 +167,7 @@ void SDL_UnlockSpinlock(SDL_SpinLock *lock)
#if defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET) #if defined(HAVE_GCC_ATOMICS) || defined(HAVE_GCC_SYNC_LOCK_TEST_AND_SET)
__sync_lock_release(lock); __sync_lock_release(lock);
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64)) #elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64) || defined(_M_ARM64EC))
SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long)); SDL_COMPILE_TIME_ASSERT(locksize, sizeof(*lock) == sizeof(long));
_InterlockedExchange_rel((long *)lock, 0); _InterlockedExchange_rel((long *)lock, 0);