1 files changed, 185 insertions, 0 deletions
diff --git a/extern/sdlew/include/SDL2/SDL_atomic.h b/extern/sdlew/include/SDL2/SDL_atomic.h
new file mode 100644
index 00000000000..6531a3e7115
--- /dev/null
+++ b/extern/sdlew/include/SDL2/SDL_atomic.h
@@ -0,0 +1,185 @@
+
+#ifndef _SDL_atomic_h_
+#define _SDL_atomic_h_
+
+#include "SDL_stdinc.h"
+#include "SDL_platform.h"
+
+#include "begin_code.h"
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1500)
+#include <intrin.h>
+#define HAVE_MSC_ATOMICS 1
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef int SDL_SpinLock;
+
+typedef SDL_bool SDLCALL tSDL_AtomicTryLock(SDL_SpinLock *lock);
+
+typedef void SDLCALL tSDL_AtomicLock(SDL_SpinLock *lock);
+
+typedef void SDLCALL tSDL_AtomicUnlock(SDL_SpinLock *lock);
+
+#if defined(_MSC_VER) && (_MSC_VER > 1200)
+void _ReadWriteBarrier(void);
+#pragma intrinsic(_ReadWriteBarrier)
+#define SDL_CompilerBarrier()   _ReadWriteBarrier()
+#elif defined(__GNUC__)
+#define SDL_CompilerBarrier()   __asm__ __volatile__ ("" : : : "memory")
+#else
+#define SDL_CompilerBarrier()   \
+{ SDL_SpinLock _tmp = 0; SDL_AtomicLock(&_tmp); SDL_AtomicUnlock(&_tmp); }
+#endif
+
+#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("lwsync" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("lwsync" : : : "memory")
+#elif defined(__GNUC__) && defined(__arm__)
+#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__)
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("dmb ish" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("dmb ish" : : : "memory")
+#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__)
+#ifdef __thumb__
+
+typedef void SDLCALL tSDL_MemoryBarrierRelease();
+typedef void SDLCALL tSDL_MemoryBarrierAcquire();
+#else
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
+#endif
+#else
+#define SDL_MemoryBarrierRelease()   __asm__ __volatile__ ("" : : : "memory")
+#define SDL_MemoryBarrierAcquire()   __asm__ __volatile__ ("" : : : "memory")
+#endif
+#else
+
+#define SDL_MemoryBarrierRelease()  SDL_CompilerBarrier()
+#define SDL_MemoryBarrierAcquire()  SDL_CompilerBarrier()
+#endif
+
+#if defined(SDL_ATOMIC_DISABLED) && SDL_ATOMIC_DISABLED
+#define SDL_DISABLE_ATOMIC_INLINE
+#endif
+#ifndef SDL_DISABLE_ATOMIC_INLINE
+
+#ifdef HAVE_MSC_ATOMICS
+
+#define SDL_AtomicSet(a, v)     _InterlockedExchange((long*)&(a)->value, (v))
+#define SDL_AtomicAdd(a, v)     _InterlockedExchangeAdd((long*)&(a)->value, (v))
+#define SDL_AtomicCAS(a, oldval, newval) (_InterlockedCompareExchange((long*)&(a)->value, (newval), (oldval)) == (oldval))
+#define SDL_AtomicSetPtr(a, v)  _InterlockedExchangePointer((a), (v))
+#if _M_IX86
+#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchange((long*)(a), (long)(newval), (long)(oldval)) == (long)(oldval))
+#else
+#define SDL_AtomicCASPtr(a, oldval, newval) (_InterlockedCompareExchangePointer((a), (newval), (oldval)) == (oldval))
+#endif
+
+#elif defined(__MACOSX__)
+#include <libkern/OSAtomic.h>
+
+#define SDL_AtomicCAS(a, oldval, newval) OSAtomicCompareAndSwap32Barrier((oldval), (newval), &(a)->value)
+#ifdef __LP64__
+#define SDL_AtomicCASPtr(a, oldval, newval) OSAtomicCompareAndSwap64Barrier((int64_t)(oldval), (int64_t)(newval), (int64_t*)(a))
+#else
+#define SDL_AtomicCASPtr(a, oldval, newval) OSAtomicCompareAndSwap32Barrier((int32_t)(oldval), (int32_t)(newval), (int32_t*)(a))
+#endif
+
+#elif defined(HAVE_GCC_ATOMICS)
+
+#define SDL_AtomicSet(a, v)     __sync_lock_test_and_set(&(a)->value, v)
+#define SDL_AtomicAdd(a, v)     __sync_fetch_and_add(&(a)->value, v)
+#define SDL_AtomicSetPtr(a, v)  __sync_lock_test_and_set(a, v)
+#define SDL_AtomicCAS(a, oldval, newval) __sync_bool_compare_and_swap(&(a)->value, oldval, newval)
+#define SDL_AtomicCASPtr(a, oldval, newval) __sync_bool_compare_and_swap(a, oldval, newval)
+
+#endif
+
+#endif
+
+#ifndef SDL_atomic_t_defined
+typedef struct { int value; } SDL_atomic_t;
+#endif
+
+#ifndef SDL_AtomicCAS
+typedef SDL_bool SDLCALL tSDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval);
+#endif
+
+#ifndef SDL_AtomicSet
+SDL_FORCE_INLINE int SDL_AtomicSet(SDL_atomic_t *a, int v)
+{
+    int value;
+    do {
+        value = a->value;
+    } while (!SDL_AtomicCAS(a, value, v));
+    return value;
+}
+#endif
+
+#ifndef SDL_AtomicGet
+SDL_FORCE_INLINE int SDL_AtomicGet(SDL_atomic_t *a)
+{
+    int value = a->value;
+    SDL_CompilerBarrier();
+    return value;
+}
+#endif
+
+#ifndef SDL_AtomicAdd
+SDL_FORCE_INLINE int SDL_AtomicAdd(SDL_atomic_t *a, int v)
+{
+    int value;
+    do {
+        value = a->value;
+    } while (!SDL_AtomicCAS(a, value, (value + v)));
+    return value;
+}
+#endif
+
+#ifndef SDL_AtomicIncRef
+#define SDL_AtomicIncRef(a)    SDL_AtomicAdd(a, 1)
+#endif
+
+#ifndef SDL_AtomicDecRef
+#define SDL_AtomicDecRef(a)    (SDL_AtomicAdd(a, -1) == 1)
+#endif
+
+#ifndef SDL_AtomicCASPtr
+typedef SDL_bool SDLCALL tSDL_AtomicCASPtr(void* *a, void *oldval, void *newval);
+#endif
+
+#ifndef SDL_AtomicSetPtr
+SDL_FORCE_INLINE void* SDL_AtomicSetPtr(void* *a, void* v)
+{
+    void* value;
+    do {
+        value = *a;
+    } while (!SDL_AtomicCASPtr(a, value, v));
+    return value;
+}
+#endif
+
+#ifndef SDL_AtomicGetPtr
+SDL_FORCE_INLINE void* SDL_AtomicGetPtr(void* *a)
+{
+    void* value = *a;
+    SDL_CompilerBarrier();
+    return value;
+}
+#endif
+
+extern tSDL_AtomicTryLock *SDL_AtomicTryLock;
+extern tSDL_AtomicLock *SDL_AtomicLock;
+extern tSDL_AtomicUnlock *SDL_AtomicUnlock;
+
+#ifdef __cplusplus
+}
+#endif
+
+#include "close_code.h"
+
+#endif
+