139#ifdef SDL_WIKI_DOCUMENTATION_SECTION
157#define SDL_CompilerBarrier() DoCompilerSpecificReadWriteBarrier()
158#elif defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__)
159void _ReadWriteBarrier(
void);
160#pragma intrinsic(_ReadWriteBarrier)
161#define SDL_CompilerBarrier() _ReadWriteBarrier()
162#elif (defined(__GNUC__) && !defined(SDL_PLATFORM_EMSCRIPTEN)) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
164#define SDL_CompilerBarrier() __asm__ __volatile__ ("" : : : "memory")
165#elif defined(__WATCOMC__)
167#pragma aux SDL_CompilerBarrier = "" parm [] modify exact [];
169#define SDL_CompilerBarrier() \
170{ SDL_SpinLock _tmp = 0; SDL_LockSpinlock(&_tmp); SDL_UnlockSpinlock(&_tmp); }
218#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
219#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("lwsync" : : : "memory")
220#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("lwsync" : : : "memory")
221#elif defined(__GNUC__) && defined(__aarch64__)
222#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
223#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
224#elif defined(__GNUC__) && defined(__arm__)
232typedef void (*SDL_KernelMemoryBarrierFunc)();
233#define SDL_MemoryBarrierRelease() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
234#define SDL_MemoryBarrierAcquire() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
236#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__)
237#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
238#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
239#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__)
242#define SDL_MEMORY_BARRIER_USES_FUNCTION
243#define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
244#define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
246#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
247#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
250#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("" : : : "memory")
251#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("" : : : "memory")
255#if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
258#define SDL_MemoryBarrierRelease() __machine_rel_barrier()
259#define SDL_MemoryBarrierAcquire() __machine_acq_barrier()
262#define SDL_MemoryBarrierRelease() SDL_CompilerBarrier()
263#define SDL_MemoryBarrierAcquire() SDL_CompilerBarrier()
268#ifdef SDL_WIKI_DOCUMENTATION_SECTION
286#define SDL_CPUPauseInstruction() DoACPUPauseInACompilerAndArchitectureSpecificWay
287#elif (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
288 #define SDL_CPUPauseInstruction() __asm__ __volatile__("pause\n")
289#elif (defined(__arm__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7) || defined(__aarch64__)
290 #define SDL_CPUPauseInstruction() __asm__ __volatile__("yield" ::: "memory")
291#elif (defined(__powerpc__) || defined(__powerpc64__))
292 #define SDL_CPUPauseInstruction() __asm__ __volatile__("or 27,27,27");
293#elif (defined(__riscv) && __riscv_xlen == 64)
294 #define SDL_CPUPauseInstruction() __asm__ __volatile__(".insn i 0x0F, 0, x0, x0, 0x010");
295#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
296 #define SDL_CPUPauseInstruction() _mm_pause()
297#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
298 #define SDL_CPUPauseInstruction() __yield()
299#elif defined(__WATCOMC__) && defined(__386__)
301 #pragma aux SDL_CPUPauseInstruction = ".686p" ".xmm2" "pause"
303 #define SDL_CPUPauseInstruction()
414#ifndef SDL_AtomicIncRef
430#define SDL_AtomicIncRef(a) SDL_AddAtomicInt(a, 1)
433#ifndef SDL_AtomicDecRef
450#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)