139#ifdef SDL_WIKI_DOCUMENTATION_SECTION
157#define SDL_CompilerBarrier() DoCompilerSpecificReadWriteBarrier()
159#elif defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__)
160void _ReadWriteBarrier(
void);
161#pragma intrinsic(_ReadWriteBarrier)
162#define SDL_CompilerBarrier() _ReadWriteBarrier()
163#elif (defined(__GNUC__) && !defined(SDL_PLATFORM_EMSCRIPTEN)) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
165#define SDL_CompilerBarrier() __asm__ __volatile__ ("" : : : "memory")
166#elif defined(__WATCOMC__)
168#pragma aux SDL_CompilerBarrier = "" parm [] modify exact [];
170#define SDL_CompilerBarrier() \
171{ SDL_SpinLock _tmp = 0; SDL_LockSpinlock(&_tmp); SDL_UnlockSpinlock(&_tmp); }
215#ifdef SDL_WIKI_DOCUMENTATION_SECTION
253#define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
276#define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
278#elif defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
279#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("lwsync" : : : "memory")
280#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("lwsync" : : : "memory")
281#elif defined(__GNUC__) && defined(__aarch64__)
282#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
283#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
284#elif defined(__GNUC__) && defined(__arm__)
292typedef void (*SDL_KernelMemoryBarrierFunc)();
293#define SDL_MemoryBarrierRelease() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
294#define SDL_MemoryBarrierAcquire() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
296#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__)
297#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
298#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
299#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__)
302#define SDL_MEMORY_BARRIER_USES_FUNCTION
303#define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
304#define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
306#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
307#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
310#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("" : : : "memory")
311#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("" : : : "memory")
315#if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
318#define SDL_MemoryBarrierRelease() __machine_rel_barrier()
319#define SDL_MemoryBarrierAcquire() __machine_acq_barrier()
322#define SDL_MemoryBarrierRelease() SDL_CompilerBarrier()
323#define SDL_MemoryBarrierAcquire() SDL_CompilerBarrier()
328#ifdef SDL_WIKI_DOCUMENTATION_SECTION
346#define SDL_CPUPauseInstruction() DoACPUPauseInACompilerAndArchitectureSpecificWay
348#elif (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
349 #define SDL_CPUPauseInstruction() __asm__ __volatile__("pause\n")
350#elif (defined(__arm__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7) || defined(__aarch64__)
351 #define SDL_CPUPauseInstruction() __asm__ __volatile__("yield" ::: "memory")
352#elif (defined(__powerpc__) || defined(__powerpc64__))
353 #define SDL_CPUPauseInstruction() __asm__ __volatile__("or 27,27,27");
354#elif (defined(__riscv) && __riscv_xlen == 64)
355 #define SDL_CPUPauseInstruction() __asm__ __volatile__(".insn i 0x0F, 0, x0, x0, 0x010");
356#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
357 #define SDL_CPUPauseInstruction() _mm_pause()
358#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
359 #define SDL_CPUPauseInstruction() __yield()
360#elif defined(__WATCOMC__) && defined(__386__)
362 #pragma aux SDL_CPUPauseInstruction = ".686p" ".xmm2" "pause"
364 #define SDL_CPUPauseInstruction()
475#ifndef SDL_AtomicIncRef
491#define SDL_AtomicIncRef(a) SDL_AddAtomicInt(a, 1)
494#ifndef SDL_AtomicDecRef
511#define SDL_AtomicDecRef(a) (SDL_AddAtomicInt(a, -1) == 1)
Uint32 SDL_GetAtomicU32(SDL_AtomicU32 *a)
void SDL_MemoryBarrierAcquireFunction(void)
bool SDL_CompareAndSwapAtomicInt(SDL_AtomicInt *a, int oldval, int newval)
void * SDL_GetAtomicPointer(void **a)
#define SDL_CompilerBarrier()
bool SDL_CompareAndSwapAtomicPointer(void **a, void *oldval, void *newval)
void SDL_MemoryBarrierReleaseFunction(void)
#define SDL_CPUPauseInstruction()
int SDL_SetAtomicInt(SDL_AtomicInt *a, int v)
void SDL_LockSpinlock(SDL_SpinLock *lock)
bool SDL_CompareAndSwapAtomicU32(SDL_AtomicU32 *a, Uint32 oldval, Uint32 newval)
void SDL_UnlockSpinlock(SDL_SpinLock *lock)
Uint32 SDL_SetAtomicU32(SDL_AtomicU32 *a, Uint32 v)
int SDL_AddAtomicInt(SDL_AtomicInt *a, int v)
bool SDL_TryLockSpinlock(SDL_SpinLock *lock)
void * SDL_SetAtomicPointer(void **a, void *v)
int SDL_GetAtomicInt(SDL_AtomicInt *a)