Commit 1dc9ae5c1e058a7e6b1711ba031bc2ceb95cf6aa
2017-03-29T15:48:22
Use GCC's atomic loads in SDL_AtomicGet and SDL_AtomicGetPtr This fixes errors reported by address sanitizer, and generates simpler code on x86 architectures.
diff --git a/src/atomic/SDL_atomic.c b/src/atomic/SDL_atomic.c
index 828efee..7b4865c 100644
--- a/src/atomic/SDL_atomic.c
+++ b/src/atomic/SDL_atomic.c
@@ -211,21 +211,29 @@ SDL_AtomicAdd(SDL_atomic_t *a, int v)
int
SDL_AtomicGet(SDL_atomic_t *a)
{
+#ifdef HAVE_GCC_ATOMICS
+ return __atomic_load_n(&a->value, __ATOMIC_SEQ_CST);
+#else
int value;
do {
value = a->value;
} while (!SDL_AtomicCAS(a, value, value));
return value;
+#endif
}
void *
SDL_AtomicGetPtr(void **a)
{
+#ifdef HAVE_GCC_ATOMICS
+ return __atomic_load_n(a, __ATOMIC_SEQ_CST);
+#else
void *value;
do {
value = *a;
} while (!SDL_AtomicCASPtr(a, value, value));
return value;
+#endif
}
void