143 #if defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__)
144 void _ReadWriteBarrier(
void);
145 #pragma intrinsic(_ReadWriteBarrier)
146 #define SDL_CompilerBarrier() _ReadWriteBarrier()
147 #elif (defined(__GNUC__) && !defined(__EMSCRIPTEN__)) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
149 #define SDL_CompilerBarrier() __asm__ __volatile__ ("" : : : "memory")
150 #elif defined(__WATCOMC__)
152 #pragma aux SDL_CompilerBarrier = "" parm [] modify exact [];
154 #define SDL_CompilerBarrier() \
155 { SDL_SpinLock _tmp = 0; SDL_AtomicLock(&_tmp); SDL_AtomicUnlock(&_tmp); }
180 #if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
181 #define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("lwsync" : : : "memory")
182 #define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("lwsync" : : : "memory")
183 #elif defined(__GNUC__) && defined(__aarch64__)
184 #define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
185 #define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
186 #elif defined(__GNUC__) && defined(__arm__)
194 typedef void (*SDL_KernelMemoryBarrierFunc)();
195 #define SDL_MemoryBarrierRelease() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
196 #define SDL_MemoryBarrierAcquire() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
198 #include <sys/cpuinline.h>
200 #define SDL_MemoryBarrierRelease() __cpu_membarrier()
201 #define SDL_MemoryBarrierAcquire() __cpu_membarrier()
203 #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__) || defined(__ARM_ARCH_8A__)
204 #define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
205 #define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
206 #elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_5TE__)
209 #define SDL_MEMORY_BARRIER_USES_FUNCTION
210 #define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
211 #define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
213 #define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
214 #define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
217 #define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("" : : : "memory")
218 #define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("" : : : "memory")
222 #if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
224 #include <mbarrier.h>
225 #define SDL_MemoryBarrierRelease() __machine_rel_barrier()
226 #define SDL_MemoryBarrierAcquire() __machine_acq_barrier()
229 #define SDL_MemoryBarrierRelease() SDL_CompilerBarrier()
230 #define SDL_MemoryBarrierAcquire() SDL_CompilerBarrier()
308 #ifndef SDL_AtomicIncRef
309 #define SDL_AtomicIncRef(a) SDL_AtomicAdd(a, 1)
318 #ifndef SDL_AtomicDecRef
319 #define SDL_AtomicDecRef(a) (SDL_AtomicAdd(a, -1) == 1)
SDL_bool SDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval)
void SDL_MemoryBarrierAcquireFunction(void)
SDL_bool SDL_AtomicCASPtr(void **a, void *oldval, void *newval)
void * SDL_AtomicGetPtr(void **a)
#define SDL_CompilerBarrier()
void SDL_MemoryBarrierReleaseFunction(void)
int SDL_AtomicGet(SDL_atomic_t *a)
SDL_bool SDL_AtomicTryLock(SDL_SpinLock *lock)
void * SDL_AtomicSetPtr(void **a, void *v)
void SDL_AtomicUnlock(SDL_SpinLock *lock)
int SDL_AtomicAdd(SDL_atomic_t *a, int v)
int SDL_AtomicSet(SDL_atomic_t *a, int v)
void SDL_AtomicLock(SDL_SpinLock *lock)
A type representing an atomic integer value. It is a struct so people don't accidentally use numeric ...