From dd1e04eedfdac61d2e243a4bcf34d68224860a9e Mon Sep 17 00:00:00 2001 From: Cameron Gutman Date: Sun, 26 Apr 2026 22:07:57 -0500 Subject: [PATCH] atomic: Use __atomic_signal_fence() for SDL_CompilerBarrier() This is the (slightly) more standard way to accomplish it. --- include/SDL_atomic.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/SDL_atomic.h b/include/SDL_atomic.h index 0148290443..b6def304a2 100644 --- a/include/SDL_atomic.h +++ b/include/SDL_atomic.h @@ -135,7 +135,9 @@ extern DECLSPEC void SDLCALL SDL_AtomicUnlock(SDL_SpinLock *lock); * The compiler barrier prevents the compiler from reordering * reads and writes to globally visible variables across the call. */ -#if defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__) +#if _SDL_HAS_BUILTIN(__atomic_signal_fence) || (defined(__GNUC__) && (__GNUC__ >= 5)) +#define SDL_CompilerBarrier() __atomic_signal_fence(__ATOMIC_SEQ_CST) +#elif defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__) void _ReadWriteBarrier(void); #pragma intrinsic(_ReadWriteBarrier) #define SDL_CompilerBarrier() _ReadWriteBarrier()