147#if defined(_MSC_VER) && (_MSC_VER > 1200) && !defined(__clang__)
148void _ReadWriteBarrier(
void);
149#pragma intrinsic(_ReadWriteBarrier)
150#define SDL_CompilerBarrier() _ReadWriteBarrier()
151#elif (defined(__GNUC__) && !defined(__EMSCRIPTEN__)) || (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
153#define SDL_CompilerBarrier() __asm__ __volatile__ ("" : : : "memory")
154#elif defined(__WATCOMC__)
156#pragma aux SDL_CompilerBarrier = "" parm [] modify exact [];
158#define SDL_CompilerBarrier() \
159{ SDL_SpinLock _tmp = 0; SDL_AtomicLock(&_tmp); SDL_AtomicUnlock(&_tmp); }
186#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
187#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("lwsync" : : : "memory")
188#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("lwsync" : : : "memory")
189#elif defined(__GNUC__) && defined(__aarch64__)
190#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
191#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
192#elif defined(__GNUC__) && defined(__arm__)
200typedef void (*SDL_KernelMemoryBarrierFunc)();
201#define SDL_MemoryBarrierRelease() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
202#define SDL_MemoryBarrierAcquire() ((SDL_KernelMemoryBarrierFunc)0xffff0fa0)()
204#include <sys/cpuinline.h>
206#define SDL_MemoryBarrierRelease() __cpu_membarrier()
207#define SDL_MemoryBarrierAcquire() __cpu_membarrier()
209#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__)
210#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
211#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
212#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__)
215#define SDL_MEMORY_BARRIER_USES_FUNCTION
216#define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
217#define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
219#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
220#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
223#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("" : : : "memory")
224#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("" : : : "memory")
228#if (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x5120))
231#define SDL_MemoryBarrierRelease() __machine_rel_barrier()
232#define SDL_MemoryBarrierAcquire() __machine_acq_barrier()
235#define SDL_MemoryBarrierRelease() SDL_CompilerBarrier()
236#define SDL_MemoryBarrierAcquire() SDL_CompilerBarrier()
241#if (defined(__GNUC__) || defined(__clang__)) && (defined(__i386__) || defined(__x86_64__))
242 #define SDL_CPUPauseInstruction() __asm__ __volatile__("pause\n")
243#elif (defined(__arm__) && defined(__ARM_ARCH) && __ARM_ARCH >= 7) || defined(__aarch64__)
244 #define SDL_CPUPauseInstruction() __asm__ __volatile__("yield" ::: "memory")
245#elif (defined(__powerpc__) || defined(__powerpc64__))
246 #define SDL_CPUPauseInstruction() __asm__ __volatile__("or 27,27,27");
247#elif defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
248 #define SDL_CPUPauseInstruction() _mm_pause()
249#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
250 #define SDL_CPUPauseInstruction() __yield()
251#elif defined(__WATCOMC__) && defined(__386__)
253 #pragma aux SDL_CPUPauseInstruction = ".686p" ".xmm2" "pause"
255 #define SDL_CPUPauseInstruction()
339#ifndef SDL_AtomicIncRef
340#define SDL_AtomicIncRef(a) SDL_AtomicAdd(a, 1)
349#ifndef SDL_AtomicDecRef
350#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)
#define SDL_CPUPauseInstruction()
SDL_bool SDL_AtomicTryLock(SDL_SpinLock *lock)
void SDL_AtomicUnlock(SDL_SpinLock *lock)
int SDL_AtomicAdd(SDL_atomic_t *a, int v)
void * SDL_AtomicSetPtr(void **a, void *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 ...