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Diffstat (limited to 'src/SDL2/include/SDL_atomic.h')
-rw-r--r--src/SDL2/include/SDL_atomic.h117
1 files changed, 9 insertions, 108 deletions
diff --git a/src/SDL2/include/SDL_atomic.h b/src/SDL2/include/SDL_atomic.h
index 7bd669d1..bb3a9b65 100644
--- a/src/SDL2/include/SDL_atomic.h
+++ b/src/SDL2/include/SDL_atomic.h
@@ -1,6 +1,6 @@
/*
Simple DirectMedia Layer
- Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
+ Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
@@ -64,13 +64,6 @@
#include "begin_code.h"
-/* Need to do this here because intrin.h has C++ code in it */
-/* Visual Studio 2005 has a bug where intrin.h conflicts with winnt.h */
-#if defined(_MSC_VER) && (_MSC_VER >= 1500)
-#include <intrin.h>
-#define HAVE_MSC_ATOMICS 1
-#endif
-
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
@@ -91,7 +84,7 @@ extern "C" {
* The spin lock functions and type are required and can not be
* emulated because they are used in the atomic emulation code.
*/
-/*@{*/
+/* @{ */
typedef int SDL_SpinLock;
@@ -118,7 +111,7 @@ extern DECLSPEC void SDLCALL SDL_AtomicLock(SDL_SpinLock *lock);
*/
extern DECLSPEC void SDLCALL SDL_AtomicUnlock(SDL_SpinLock *lock);
-/*@}*//*SDL AtomicLock*/
+/* @} *//* SDL AtomicLock */
/**
@@ -181,57 +174,11 @@ extern DECLSPEC void SDLCALL SDL_MemoryBarrierAcquire();
#define SDL_MemoryBarrierAcquire() SDL_CompilerBarrier()
#endif
-
-/* Platform specific optimized versions of the atomic functions,
- * you can disable these by defining SDL_DISABLE_ATOMIC_INLINE
- */
-#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 /* !SDL_DISABLE_ATOMIC_INLINE */
-
-
/**
* \brief A type representing an atomic integer value. It is a struct
* so people don't accidentally use numeric operations on it.
*/
-#ifndef SDL_atomic_t_defined
typedef struct { int value; } SDL_atomic_t;
-#endif
/**
* \brief Set an atomic variable to a new value if it is currently an old value.
@@ -240,37 +187,19 @@ typedef struct { int value; } SDL_atomic_t;
*
* \note If you don't know what this function is for, you shouldn't use it!
*/
-#ifndef SDL_AtomicCAS
extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCAS(SDL_atomic_t *a, int oldval, int newval);
-#endif
/**
* \brief Set an atomic variable to a value.
*
* \return The previous value of the atomic variable.
*/
-#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
+extern DECLSPEC int SDLCALL SDL_AtomicSet(SDL_atomic_t *a, int v);
/**
* \brief Get the value of an atomic variable
*/
-#ifndef SDL_AtomicGet
-SDL_FORCE_INLINE int SDL_AtomicGet(SDL_atomic_t *a)
-{
- int value = a->value;
- SDL_CompilerBarrier();
- return value;
-}
-#endif
+extern DECLSPEC int SDLCALL SDL_AtomicGet(SDL_atomic_t *a);
/**
* \brief Add to an atomic variable.
@@ -279,16 +208,7 @@ SDL_FORCE_INLINE int SDL_AtomicGet(SDL_atomic_t *a)
*
* \note This same style can be used for any number operation
*/
-#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
+extern DECLSPEC int SDLCALL SDL_AtomicAdd(SDL_atomic_t *a, int v);
/**
* \brief Increment an atomic variable used as a reference count.
@@ -314,38 +234,19 @@ SDL_FORCE_INLINE int SDL_AtomicAdd(SDL_atomic_t *a, int v)
*
* \note If you don't know what this function is for, you shouldn't use it!
*/
-#ifndef SDL_AtomicCASPtr
-extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCASPtr(void* *a, void *oldval, void *newval);
-#endif
+extern DECLSPEC SDL_bool SDLCALL SDL_AtomicCASPtr(void **a, void *oldval, void *newval);
/**
* \brief Set a pointer to a value atomically.
*
* \return The previous value of the pointer.
*/
-#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
+extern DECLSPEC void* SDLCALL SDL_AtomicSetPtr(void **a, void* v);
/**
* \brief Get the value of a pointer atomically.
*/
-#ifndef SDL_AtomicGetPtr
-SDL_FORCE_INLINE void* SDL_AtomicGetPtr(void* *a)
-{
- void* value = *a;
- SDL_CompilerBarrier();
- return value;
-}
-#endif
-
+extern DECLSPEC void* SDLCALL SDL_AtomicGetPtr(void **a);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
generated by cgit (git 2.34.1) at 2024-11-15 12:28:29 +0000