sdl-ios-xcode: src/atomic/win32/SDL

comparison src/atomic/win32/SDL_atomic.c @ 3202:3aa519a5c676

I've made so many changes I don't dare continue until I check the current stuff in. /test/testatomic.c performs absolutely basic tests to show that the function work as expected. Need a second test to do more detailed tests. /include/SDL_atomic.h provides declarations for all included functions. /src/atomic/linux/SDL_atomic.c provided all the functions. On a generic built the 64 bit functions work, but they are emulated. On a build for -march=pentium and above the 64 bit functions use native instructions /src/atomic/dummy/SDL_atomic.c emulates all the operations using SDL_mutex.h. /src/atomic/win32/SDL_atomic.c is a copy of dummy /src/atomic/macosx/SDL_atomic.s is a copy of dummy These versions of SDL_atomic.c provide a frame work for building the library with a mixture of native and emulated functions. This allows the whole library to be provided on all platforms. (I hope.) I hope this fits with the SDL philosophy of either providing a common subset or emulating when the platform is missing a feature. I have not added dummy, macosx, or win32 to the build. They are there as place holders for future work. I have modified congifure.in to compile sources in /src/atomic/linux. (The SDL configure.in file is an amazing piece of work and I hope I didn't mess it up. :-)

author	Bob Pendleton <bob@pendleton.com>
date	Mon, 29 Jun 2009 19:54:43 +0000
parents	3e1bf2b8bd81
children	759032c318d8

comparison

equal deleted inserted replaced

-:c297230efc75
+:3aa519a5c676
 Sam Lantinga
 slouken@libsdl.org
 */
-#ifdef SDL_ATOMIC_LINUX
+#include "SDL_stdinc.h"
-#include "SDL.h"
-#include "SDL_config.h"
 #include "SDL_atomic.h"
+/*
+This file provides 8, 16, 32, and 64 bit atomic operations. If the
+operations are provided by the native hardware and operating system
+they are used. If they are not then the operations are emulated
+using the SDL mutex operations.
+*/
+/*
+First, detect whether the operations are supported and create
+#defines that indicate that they do exist. The goal is to have all
+the system dependent code in the top part of the file so that the
+bottom can be use unchanged across all platforms.
+Second, #define all the operations in each size class that are
+supported. Doing this allows supported operations to be used along
+side of emulated operations.
+*/
+/*
+Emmulated version.
+Assume there is no support for atomic operations. All such
+operations are implemented using SDL mutex operations.
+*/
+#ifdef EMULATED_ATOMIC_OPERATIONS
+#undef EMULATED_ATOMIC_OPERATIONS
+#endif
+#ifdef EMULATED_ATOMIC_OPERATIONS
+#define HAVE_ALL_8_BIT_OPS
+#define nativeExchange8(ptr, value)			()
+#define nativeCompareThenSet8(ptr, oldvalue, newvalue) 	()
+#define nativeTestThenSet8(ptr)    	     		()
+#define nativeClear8(ptr)				()
+#define nativeFetchThenIncrement8(ptr)   		()
+#define nativeFetchThenDecrement8(ptr) 			()
+#define nativeFetchThenAdd8(ptr, value) 		()
+#define nativeFetchThenSubtract8(ptr, value) 		()
+#define nativeIncrementThenFetch8(ptr) 			()
+#define nativeDecrementThenFetch8(ptr) 			()
+#define nativeAddThenFetch8(ptr, value) 		()
+#define nativeSubtractThenFetch8(ptr, value) 		()
+#endif
+#ifdef EMULATED_ATOMIC_OPERATIONS
+#define HAVE_ALL_16_BIT_OPS
+#define nativeExchange16(ptr, value)			()
+#define nativeCompareThenSet16(ptr, oldvalue, newvalue) ()
+#define nativeTestThenSet16(ptr)    	     		()
+#define nativeClear16(ptr)				()
+#define nativeFetchThenIncrement16(ptr)   		()
+#define nativeFetchThenDecrement16(ptr) 		()
+#define nativeFetchThenAdd16(ptr, value) 		()
+#define nativeFetchThenSubtract16(ptr, value) 		()
+#define nativeIncrementThenFetch16(ptr) 		()
+#define nativeDecrementThenFetch16(ptr) 		()
+#define nativeAddThenFetch16(ptr, value) 		()
+#define nativeSubtractThenFetch16(ptr, value) 		()
+#endif
+#ifdef EMULATED_ATOMIC_OPERATIONS
+#define HAVE_ALL_32_BIT_OPS
+#define nativeExchange32(ptr, value)			()
+#define nativeCompareThenSet32(ptr, oldvalue, newvalue) ()
+#define nativeTestThenSet32(ptr)    	     		()
+#define nativeClear32(ptr)				()
+#define nativeFetchThenIncrement32(ptr)   		()
+#define nativeFetchThenDecrement32(ptr) 		()
+#define nativeFetchThenAdd32(ptr, value) 		()
+#define nativeFetchThenSubtract32(ptr, value) 		()
+#define nativeIncrementThenFetch32(ptr) 		()
+#define nativeDecrementThenFetch32(ptr) 		()
+#define nativeAddThenFetch32(ptr, value) 		()
+#define nativeSubtractThenFetch32(ptr, value) 		()
+#endif
+#ifdef EMULATED_ATOMIC_OPERATIONS
+#define HAVE_ALL_64_BIT_OPS
+#define nativeExchange64(ptr, value)			()
+#define nativeCompareThenSet64(ptr, oldvalue, newvalue) ()
+#define nativeTestThenSet64(ptr)    	     		()
+#define nativeClear64(ptr)				()
+#define nativeFetchThenIncrement64(ptr)   		()
+#define nativeFetchThenDecrement64(ptr) 		()
+#define nativeFetchThenAdd64(ptr, value) 		()
+#define nativeFetchThenSubtract64(ptr, value) 		()
+#define nativeIncrementThenFetch64(ptr) 		()
+#define nativeDecrementThenFetch64(ptr) 		()
+#define nativeAddThenFetch64(ptr, value) 		()
+#define nativeSubtractThenFetch64(ptr, value) 		()
+#endif
+/*
+If any of the operations are not provided then we must emulate some of
+them.
+*/
+#if !defined(HAVE_ALL_8_BIT_OPS) || !defined(HAVE_ALL_16_BIT_OPS) || !defined(HAVE_ALL_32_BIT_OPS) || !defined(HAVE_ALL_64_BIT_OPS)
+#include "SDL_mutex.h"
+#include "SDL_error.h"
+static SDL_mutex * lock = NULL;
+static __inline__ void
+privateWaitLock()
+{
+if(NULL == lock)
+{
+lock = SDL_CreateMutex();
+if (NULL == lock)
+{
+	 SDL_SetError("SDL_atomic.c: can't create a mutex");
+	 return;
+}
+}
+if (-1 == SDL_LockMutex(lock))
+{
+SDL_SetError("SDL_atomic.c: can't lock mutex");
+}
+}
+static __inline__ void
+privateUnlock()
+{
+if (-1 == SDL_UnlockMutex(lock))
+{
+SDL_SetError("SDL_atomic.c: can't unlock mutex");
+}
+}
+#endif
+/* 8 bit atomic operations */
+Uint8
+SDL_AtomicExchange8(Uint8 * ptr, Uint8 value)
+{
+#ifdef nativeExchange8
+return nativeExchange8(ptr, value);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+*ptr = value;
+privateUnlock();
+return tmp;
+#endif
+}
+SDL_bool
+SDL_AtomicCompareThenSet8(Uint8 * ptr, Uint8 oldvalue, Uint8 newvalue)
+{
+#ifdef nativeCompareThenSet8
+return (SDL_bool)nativeCompareThenSet8(ptr, oldvalue, newvalue);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == oldvalue);
+if (result)
+{
+*ptr = newvalue;
+}
+privateUnlock();
+return result;
+#endif
+}
+SDL_bool
+SDL_AtomicTestThenSet8(Uint8 * ptr)
+{
+#ifdef nativeTestThenSet8
+return (SDL_bool)nativeTestThenSet8(ptr);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == 0);
+if (result)
+{
+*ptr = 1;
+}
+privateUnlock();
+return result;
+#endif
+}
+void
+SDL_AtomicClear8(Uint8 * ptr)
+{
+#ifdef nativeClear8
+nativeClear8(ptr);
+#else
+privateWaitLock();
+*ptr = 0;
+privateUnlock();
+return;
+#endif
+}
+Uint8
+SDL_AtomicFetchThenIncrement8(Uint8 * ptr)
+{
+#ifdef nativeFetchThenIncrement8
+return nativeFetchThenIncrement8(ptr);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= 1;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicFetchThenDecrement8(Uint8 * ptr)
+{
+#ifdef nativeFetchThenDecrement8
+return nativeFetchThenDecrement8(ptr);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr) -= 1;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicFetchThenAdd8(Uint8 * ptr, Uint8 value)
+{
+#ifdef nativeFetchThenAdd8
+return nativeFetchThenAdd8(ptr, value);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= value;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicFetchThenSubtract8(Uint8 * ptr, Uint8 value)
+{
+#ifdef nativeFetchThenSubtract8
+return nativeFetchThenSubtract8(ptr, value);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)-= value;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicIncrementThenFetch8(Uint8 * ptr)
+{
+#ifdef nativeIncrementThenFetch8
+return nativeIncrementThenFetch8(ptr);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+(*ptr)+= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicDecrementThenFetch8(Uint8 * ptr)
+{
+#ifdef nativeDecrementThenFetch8
+return nativeDecrementThenFetch8(ptr);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+(*ptr)-= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicAddThenFetch8(Uint8 * ptr, Uint8 value)
+{
+#ifdef nativeAddThenFetch8
+return nativeAddThenFetch8(ptr, value);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+(*ptr)+= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint8
+SDL_AtomicSubtractThenFetch8(Uint8 * ptr, Uint8 value)
+{
+#ifdef nativeSubtractThenFetch8
+return nativeSubtractThenFetch8(ptr, value);
+#else
+Uint8 tmp = 0;;
+privateWaitLock();
+(*ptr)-= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+/* 16 bit atomic operations */
+Uint16
+SDL_AtomicExchange16(Uint16 * ptr, Uint16 value)
+{
+#ifdef nativeExchange16
+return nativeExchange16(ptr, value);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+*ptr = value;
+privateUnlock();
+return tmp;
+#endif
+}
+SDL_bool
+SDL_AtomicCompareThenSet16(Uint16 * ptr, Uint16 oldvalue, Uint16 newvalue)
+{
+#ifdef nativeCompareThenSet16
+return (SDL_bool)nativeCompareThenSet16(ptr, oldvalue, newvalue);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == oldvalue);
+if (result)
+{
+*ptr = newvalue;
+}
+privateUnlock();
+return result;
+#endif
+}
+SDL_bool
+SDL_AtomicTestThenSet16(Uint16 * ptr)
+{
+#ifdef nativeTestThenSet16
+return (SDL_bool)nativeTestThenSet16(ptr);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == 0);
+if (result)
+{
+*ptr = 1;
+}
+privateUnlock();
+return result;
+#endif
+}
+void
+SDL_AtomicClear16(Uint16 * ptr)
+{
+#ifdef nativeClear16
+nativeClear16(ptr);
+#else
+privateWaitLock();
+*ptr = 0;
+privateUnlock();
+return;
+#endif
+}
+Uint16
+SDL_AtomicFetchThenIncrement16(Uint16 * ptr)
+{
+#ifdef nativeFetchThenIncrement16
+return nativeFetchThenIncrement16(ptr);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= 1;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicFetchThenDecrement16(Uint16 * ptr)
+{
+#ifdef nativeFetchThenDecrement16
+return nativeFetchThenDecrement16(ptr);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr) -= 1;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicFetchThenAdd16(Uint16 * ptr, Uint16 value)
+{
+#ifdef nativeFetchThenAdd16
+return nativeFetchThenAdd16(ptr, value);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= value;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicFetchThenSubtract16(Uint16 * ptr, Uint16 value)
+{
+#ifdef nativeFetchThenSubtract16
+return nativeFetchThenSubtract16(ptr, value);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)-= value;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicIncrementThenFetch16(Uint16 * ptr)
+{
+#ifdef nativeIncrementThenFetch16
+return nativeIncrementThenFetch16(ptr);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+(*ptr)+= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicDecrementThenFetch16(Uint16 * ptr)
+{
+#ifdef nativeDecrementThenFetch16
+return nativeDecrementThenFetch16(ptr);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+(*ptr)-= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicAddThenFetch16(Uint16 * ptr, Uint16 value)
+{
+#ifdef nativeAddThenFetch16
+return nativeAddThenFetch16(ptr, value);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+(*ptr)+= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+Uint16
+SDL_AtomicSubtractThenFetch16(Uint16 * ptr, Uint16 value)
+{
+#ifdef nativeSubtractThenFetch16
+return nativeSubtractThenFetch16(ptr, value);
+#else
+Uint16 tmp = 0;;
+privateWaitLock();
+(*ptr)-= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+/* 32 bit atomic operations */
 Uint32
 SDL_AtomicExchange32(Uint32 * ptr, Uint32 value)
 {
-return 0;
+#ifdef nativeExchange32
+return nativeExchange32(ptr, value);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+*ptr = value;
+privateUnlock();
+return tmp;
+#endif
 }
 SDL_bool
 SDL_AtomicCompareThenSet32(Uint32 * ptr, Uint32 oldvalue, Uint32 newvalue)
 {
-return SDL_false;
+#ifdef nativeCompareThenSet32
+return (SDL_bool)nativeCompareThenSet32(ptr, oldvalue, newvalue);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == oldvalue);
+if (result)
+{
+*ptr = newvalue;
+}
+privateUnlock();
+return result;
+#endif
 }
 SDL_bool
 SDL_AtomicTestThenSet32(Uint32 * ptr)
 {
-return SDL_false;
+#ifdef nativeTestThenSet32
+return (SDL_bool)nativeTestThenSet32(ptr);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == 0);
+if (result)
+{
+*ptr = 1;
+}
+privateUnlock();
+return result;
+#endif
 }
 void
 SDL_AtomicClear32(Uint32 * ptr)
 {
+#ifdef nativeClear32
+nativeClear32(ptr);
+#else
+privateWaitLock();
+*ptr = 0;
+privateUnlock();
+return;
+#endif
 }
 Uint32
 SDL_AtomicFetchThenIncrement32(Uint32 * ptr)
 {
-return 0;
+#ifdef nativeFetchThenIncrement32
+return nativeFetchThenIncrement32(ptr);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= 1;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicFetchThenDecrement32(Uint32 * ptr)
 {
-return 0;
+#ifdef nativeFetchThenDecrement32
+return nativeFetchThenDecrement32(ptr);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr) -= 1;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicFetchThenAdd32(Uint32 * ptr, Uint32 value)
 {
-return 0;
+#ifdef nativeFetchThenAdd32
+return nativeFetchThenAdd32(ptr, value);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= value;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicFetchThenSubtract32(Uint32 * ptr, Uint32 value)
 {
-return 0;
+#ifdef nativeFetchThenSubtract32
+return nativeFetchThenSubtract32(ptr, value);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)-= value;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicIncrementThenFetch32(Uint32 * ptr)
 {
-return 0;
+#ifdef nativeIncrementThenFetch32
+return nativeIncrementThenFetch32(ptr);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+(*ptr)+= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicDecrementThenFetch32(Uint32 * ptr)
 {
-return 0;
+#ifdef nativeDecrementThenFetch32
+return nativeDecrementThenFetch32(ptr);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+(*ptr)-= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicAddThenFetch32(Uint32 * ptr, Uint32 value)
 {
-return 0;
+#ifdef nativeAddThenFetch32
+return nativeAddThenFetch32(ptr, value);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+(*ptr)+= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint32
 SDL_AtomicSubtractThenFetch32(Uint32 * ptr, Uint32 value)
 {
-return 0;
+#ifdef nativeSubtractThenFetch32
-}
+return nativeSubtractThenFetch32(ptr, value);
+#else
+Uint32 tmp = 0;;
+privateWaitLock();
+(*ptr)-= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+/* 64 bit atomic operations */
 #ifdef SDL_HAS_64BIT_TYPE
 Uint64
 SDL_AtomicExchange64(Uint64 * ptr, Uint64 value)
 {
-return 0;
+#ifdef nativeExchange64
+return nativeExchange64(ptr, value);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+*ptr = value;
+privateUnlock();
+return tmp;
+#endif
 }
 SDL_bool
-SDL_AtomicCompareThenSet64(Uint64 * ptr,
+SDL_AtomicCompareThenSet64(Uint64 * ptr, Uint64 oldvalue, Uint64 newvalue)
-Uint64 oldvalue, Uint64 newvalue)
+{
-{
+#ifdef nativeCompareThenSet64
-return SDL_false;
+return (SDL_bool)nativeCompareThenSet64(ptr, oldvalue, newvalue);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == oldvalue);
+if (result)
+{
+*ptr = newvalue;
+}
+privateUnlock();
+return result;
+#endif
 }
 SDL_bool
 SDL_AtomicTestThenSet64(Uint64 * ptr)
 {
-return SDL_false;
+#ifdef nativeTestThenSet64
+return (SDL_bool)nativeTestThenSet64(ptr);
+#else
+SDL_bool result = SDL_FALSE;
+privateWaitLock();
+result = (*ptr == 0);
+if (result)
+{
+*ptr = 1;
+}
+privateUnlock();
+return result;
+#endif
 }
 void
 SDL_AtomicClear64(Uint64 * ptr)
 {
+#ifdef nativeClear64
+nativeClear64(ptr);
+#else
+privateWaitLock();
+*ptr = 0;
+privateUnlock();
+return;
+#endif
 }
 Uint64
 SDL_AtomicFetchThenIncrement64(Uint64 * ptr)
 {
-return 0;
+#ifdef nativeFetchThenIncrement64
+return nativeFetchThenIncrement64(ptr);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= 1;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicFetchThenDecrement64(Uint64 * ptr)
 {
-return 0;
+#ifdef nativeFetchThenDecrement64
+return nativeFetchThenDecrement64(ptr);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr) -= 1;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicFetchThenAdd64(Uint64 * ptr, Uint64 value)
 {
-return 0;
+#ifdef nativeFetchThenAdd64
+return nativeFetchThenAdd64(ptr, value);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)+= value;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicFetchThenSubtract64(Uint64 * ptr, Uint64 value)
 {
-return 0;
+#ifdef nativeFetchThenSubtract64
+return nativeFetchThenSubtract64(ptr, value);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+tmp = *ptr;
+(*ptr)-= value;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicIncrementThenFetch64(Uint64 * ptr)
 {
-return 0;
+#ifdef nativeIncrementThenFetch64
+return nativeIncrementThenFetch64(ptr);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+(*ptr)+= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicDecrementThenFetch64(Uint64 * ptr)
 {
-return 0;
+#ifdef nativeDecrementThenFetch64
+return nativeDecrementThenFetch64(ptr);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+(*ptr)-= 1;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicAddThenFetch64(Uint64 * ptr, Uint64 value)
 {
-return 0;
+#ifdef nativeAddThenFetch64
+return nativeAddThenFetch64(ptr, value);
+#else
+Uint64 tmp = 0;;
+privateWaitLock();
+(*ptr)+= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
 }
 Uint64
 SDL_AtomicSubtractThenFetch64(Uint64 * ptr, Uint64 value)
 {
-return 0;
+#ifdef nativeSubtractThenFetch64
-}
+return nativeSubtractThenFetch64(ptr, value);
+#else
-#endif
+Uint64 tmp = 0;;
-#endif
+privateWaitLock();
+(*ptr)-= value;
+tmp = *ptr;
+privateUnlock();
+return tmp;
+#endif
+}
+#endif

Mercurial > sdl-ios-xcode

comparison src/atomic/win32/SDL_atomic.c @ 3202:3aa519a5c676