forked from bartvdbraak/blender
186 lines
5.5 KiB
C
186 lines
5.5 KiB
C
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#ifndef _SDL_atomic_h_
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#define _SDL_atomic_h_
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#include "SDL_stdinc.h"
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#include "SDL_platform.h"
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#include "begin_code.h"
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#if defined(_MSC_VER) && (_MSC_VER >= 1500)
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#include <intrin.h>
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#define HAVE_MSC_ATOMICS 1
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef int SDL_SpinLock;
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typedef SDL_bool SDLCALL tSDL_AtomicTryLock(SDL_SpinLock *lock);
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typedef void SDLCALL tSDL_AtomicLock(SDL_SpinLock *lock);
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typedef void SDLCALL tSDL_AtomicUnlock(SDL_SpinLock *lock);
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#if defined(_MSC_VER) && (_MSC_VER > 1200)
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void _ReadWriteBarrier(void);
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#pragma intrinsic(_ReadWriteBarrier)
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#define SDL_CompilerBarrier() _ReadWriteBarrier()
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#elif defined(__GNUC__)
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#define SDL_CompilerBarrier() __asm__ __volatile__ ("" : : : "memory")
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#else
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#define SDL_CompilerBarrier() \
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{ SDL_SpinLock _tmp = 0; SDL_AtomicLock(&_tmp); SDL_AtomicUnlock(&_tmp); }
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#endif
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#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
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#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("lwsync" : : : "memory")
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#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("lwsync" : : : "memory")
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#elif defined(__GNUC__) && defined(__arm__)
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#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__)
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#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
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#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
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#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__)
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#ifdef __thumb__
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typedef void SDLCALL tSDL_MemoryBarrierRelease();
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typedef void SDLCALL tSDL_MemoryBarrierAcquire();
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#else
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#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
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#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
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#endif
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#else
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#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("" : : : "memory")
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#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("" : : : "memory")
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#endif
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#else
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#define SDL_MemoryBarrierRelease() SDL_CompilerBarrier()
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#define SDL_MemoryBarrierAcquire() SDL_CompilerBarrier()
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#endif
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#if defined(SDL_ATOMIC_DISABLED) && SDL_ATOMIC_DISABLED
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#define SDL_DISABLE_ATOMIC_INLINE
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#endif
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#ifndef SDL_DISABLE_ATOMIC_INLINE
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#ifdef HAVE_MSC_ATOMICS
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#define SDL_AtomicSet(a, v) _InterlockedExchange((long*)&(a)->value, (v))
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#define SDL_AtomicAdd(a, v) _InterlockedExchangeAdd((long*)&(a)->value, (v))
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#define SDL_AtomicCAS(a, oldval, newval) (_InterlockedCompareExchange((long*)&(a)->value, (newval), (oldval)) == (oldval))
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#define SDL_AtomicSetPtr(a, v) _InterlockedExchangePointer((a), (v))
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#if _M_IX86
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#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchange((long*)(a), (long)(newval), (long)(oldval)) == (long)(oldval))
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#else
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#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchangePointer((a), (newval), (oldval)) == (oldval))
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#endif
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#elif defined(__MACOSX__)
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#include <libkern/OSAtomic.h>
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#define SDL_AtomicCAS(a, oldval, newval) OSAtomicCompareAndSwap32Barrier((oldval), (newval), &(a)->value)
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#ifdef __LP64__
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#define SDL_AtomicCASPtr(a, oldval, newval) OSAtomicCompareAndSwap64Barrier((int64_t)(oldval), (int64_t)(newval), (int64_t*)(a))
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#else
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#define SDL_AtomicCASPtr(a, oldval, newval) OSAtomicCompareAndSwap32Barrier((int32_t)(oldval), (int32_t)(newval), (int32_t*)(a))
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#endif
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#elif defined(HAVE_GCC_ATOMICS)
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#define SDL_AtomicSet(a, v) __sync_lock_test_and_set(&(a)->value, v)
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#define SDL_AtomicAdd(a, v) __sync_fetch_and_add(&(a)->value, v)
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#define SDL_AtomicSetPtr(a, v) __sync_lock_test_and_set(a, v)
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#define SDL_AtomicCAS(a, oldval, newval) __sync_bool_compare_and_swap(&(a)->value, oldval, newval)
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#define SDL_AtomicCASPtr(a, oldval, newval) __sync_bool_compare_and_swap(a, oldval, newval)
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#endif
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#endif
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#ifndef SDL_atomic_t_defined
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typedef struct { int value; } SDL_atomic_t;
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#endif
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#ifndef SDL_AtomicCAS
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typedef SDL_bool SDLCALL tSDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval);
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#endif
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#ifndef SDL_AtomicSet
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SDL_FORCE_INLINE int SDL_AtomicSet(SDL_atomic_t *a, int v)
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{
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int value;
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do {
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value = a->value;
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} while (!SDL_AtomicCAS(a, value, v));
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return value;
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}
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#endif
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#ifndef SDL_AtomicGet
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SDL_FORCE_INLINE int SDL_AtomicGet(SDL_atomic_t *a)
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{
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int value = a->value;
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SDL_CompilerBarrier();
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return value;
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}
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#endif
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#ifndef SDL_AtomicAdd
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SDL_FORCE_INLINE int SDL_AtomicAdd(SDL_atomic_t *a, int v)
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{
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int value;
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do {
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value = a->value;
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} while (!SDL_AtomicCAS(a, value, (value + v)));
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return value;
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}
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#endif
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#ifndef SDL_AtomicIncRef
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#define SDL_AtomicIncRef(a) SDL_AtomicAdd(a, 1)
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#endif
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#ifndef SDL_AtomicDecRef
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#define SDL_AtomicDecRef(a) (SDL_AtomicAdd(a, -1) == 1)
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#endif
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#ifndef SDL_AtomicCASPtr
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typedef SDL_bool SDLCALL tSDL_AtomicCASPtr(void* *a, void *oldval, void *newval);
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#endif
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#ifndef SDL_AtomicSetPtr
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SDL_FORCE_INLINE void* SDL_AtomicSetPtr(void* *a, void* v)
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{
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void* value;
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do {
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value = *a;
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} while (!SDL_AtomicCASPtr(a, value, v));
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return value;
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}
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#endif
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#ifndef SDL_AtomicGetPtr
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SDL_FORCE_INLINE void* SDL_AtomicGetPtr(void* *a)
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{
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void* value = *a;
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SDL_CompilerBarrier();
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return value;
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}
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#endif
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extern tSDL_AtomicTryLock *SDL_AtomicTryLock;
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extern tSDL_AtomicLock *SDL_AtomicLock;
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extern tSDL_AtomicUnlock *SDL_AtomicUnlock;
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#ifdef __cplusplus
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}
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#endif
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#include "close_code.h"
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#endif
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