author  Bob Pendleton <bob@pendleton.com> 
Mon, 21 Sep 2009 22:25:14 +0000  
changeset 3297  d430982cd5cc 
parent 3296  6fe620d7ce92 
child 3308  0e000afe3dc0 
permissions  rwrr 
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/* 
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SDL  Simple DirectMedia Layer 
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Copyright (C) 19972009 Sam Lantinga 
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This library is free software; you can redistribute it and/or 
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modify it under the terms of the GNU Lesser General Public 
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License as published by the Free Software Foundation; either 
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version 2.1 of the License, or (at your option) any later version. 
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This library is distributed in the hope that it will be useful, 
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but WITHOUT ANY WARRANTY; without even the implied warranty of 
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 
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Lesser General Public License for more details. 
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You should have received a copy of the GNU Lesser General Public 
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License along with this library; if not, write to the Free Software 
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 021101301 USA 
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Sam Lantinga 
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slouken@libsdl.org 
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Contributed by Bob Pendleton, bob@pendleton.com 
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*/ 
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#include "SDL_stdinc.h" 
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#include "SDL_atomic.h" 
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#include "SDL_error.h" 
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/* 
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This file provides 32, and 64 bit atomic operations. If the 
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operations are provided by the native hardware and operating system 
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they are used. If they are not then the operations are emulated 
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using the SDL spin lock operations. If spin lock can not be 
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implemented then these functions must fail. 
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*/ 
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LINUX/GCC VERSION. 
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This version of the code assumes support of the atomic builtins as 
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documented at gcc.gnu.org/onlinedocs/gcc/AtomicBuiltins.html This 
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code should work on any modern x86 or other processor supported by 
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GCC. 
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Some processors will only support some of these operations so 
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#ifdefs will have to be added as incompatibilities are discovered 
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*/ 
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/* 
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Native spinlock routines. 
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*/ 
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void 
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SDL_AtomicLock(SDL_SpinLock *lock) 
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{ 
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while (0 != __sync_lock_test_and_set(lock, 1)) 
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{ 
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} 
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} 
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void 
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SDL_AtomicUnlock(SDL_SpinLock *lock) 
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{ 
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__sync_lock_test_and_set(lock, 0); 
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} 
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/* 
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Note that platform specific versions can be built from this version 
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by changing the #undefs to #defines and adding platform specific 
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code. 
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*/ 
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#define nativeTestThenSet32 
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#define nativeClear32 
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#define nativeFetchThenIncrement32 
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#define nativeFetchThenDecrement32 
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#define nativeFetchThenAdd32 
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#define nativeFetchThenSubtract32 
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#define nativeIncrementThenFetch32 
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#define nativeDecrementThenFetch32 
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#define nativeAddThenFetch32 
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#define nativeSubtractThenFetch32 
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#ifdef SDL_HAS_64BIT_TYPE 
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#ifdef __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 
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#define nativeTestThenSet64 
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#define nativeClear64 
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#define nativeFetchThenIncrement64 
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#define nativeFetchThenDecrement64 
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#define nativeFetchThenAdd64 
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#define nativeFetchThenSubtract64 
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#define nativeIncrementThenFetch64 
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#define nativeDecrementThenFetch64 
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#define nativeAddThenFetch64 
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#define nativeSubtractThenFetch64 
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#else 
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#undef nativeTestThenSet64 
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#undef nativeClear64 
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#undef nativeFetchThenIncrement64 
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#undef nativeFetchThenDecrement64 
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#undef nativeFetchThenAdd64 
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#undef nativeFetchThenSubtract64 
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#undef nativeIncrementThenFetch64 
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#undef nativeDecrementThenFetch64 
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#undef nativeAddThenFetch64 
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#undef nativeSubtractThenFetch64 
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#endif /* __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 */ 
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#endif /* SDL_HAS_64BIT_TYPE */ 
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/* 
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If any of the operations are not provided then we must emulate some 
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of them. That means we need a nice implementation of spin locks 
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that avoids the "one big lock" problem. We use a vector of spin 
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locks and pick which one to use based on the address of the operand 
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of the function. 
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To generate the index of the lock we first shift by 3 bits to get 
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rid on the zero bits that result from 32 and 64 bit allignment of 
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data. We then mask off all but 5 bits and use those 5 bits as an 
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index into the table. 
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Picking the lock this way insures that accesses to the same data at 
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the same time will go to the same lock. OTOH, accesses to different 
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data have only a 1/32 chance of hitting the same lock. That should 
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pretty much eliminate the chances of several atomic operations on 
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different data from waiting on the same "big lock". If it isn't 
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then the table of locks can be expanded to a new size so long as 
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the new size if a power of two. 
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*/ 
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static SDL_SpinLock locks[32] = { 
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0, 0, 0, 0, 0, 0, 0, 0, 
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0, 0, 0, 0, 0, 0, 0, 0, 
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0, 0, 0, 0, 0, 0, 0, 0, 
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0, 0, 0, 0, 0, 0, 0, 0, 
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}; 
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static __inline__ void 
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privateWaitLock(volatile void *ptr) 
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{ 
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#if SIZEOF_VOIDP == 4 
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Uint32 index = ((((Uint32)ptr) >> 3) & 0x1f); 
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#elif SIZEOF_VOIDP == 8 
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Uint64 index = ((((Uint64)ptr) >> 3) & 0x1f); 
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#endif 
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SDL_AtomicLock(&locks[index]); 
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} 
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static __inline__ void 
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privateUnlock(volatile void *ptr) 
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{ 
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#if SIZEOF_VOIDP == 4 
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Uint32 index = ((((Uint32)ptr) >> 3) & 0x1f); 
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#elif SIZEOF_VOIDP == 8 
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Uint64 index = ((((Uint64)ptr) >> 3) & 0x1f); 
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#endif 
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SDL_AtomicUnlock(&locks[index]); 
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} 
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/* 32 bit atomic operations */ 
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SDL_bool 
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SDL_AtomicTestThenSet32(volatile Uint32 * ptr) 
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{ 
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#ifdef nativeTestThenSet32 
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return 0 == __sync_lock_test_and_set(ptr, 1); 
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#else 
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SDL_bool result = SDL_FALSE; 
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privateWaitLock(ptr); 
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result = (*ptr == 0); 
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if (result) 
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{ 
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*ptr = 1; 
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} 
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privateUnlock(ptr); 
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return result; 
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#endif 
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} 
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void 
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SDL_AtomicClear32(volatile Uint32 * ptr) 
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{ 
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#ifdef nativeClear32 
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__sync_lock_test_and_set(ptr, 0); 
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return; 
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#else 
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privateWaitLock(ptr); 
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*ptr = 0; 
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privateUnlock(ptr); 
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return; 
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#endif 
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} 
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Uint32 
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SDL_AtomicFetchThenIncrement32(volatile Uint32 * ptr) 
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{ 
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#ifdef nativeFetchThenIncrement32 
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return __sync_fetch_and_add(ptr, 1); 
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#else 
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Uint32 tmp = 0; 
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privateWaitLock(ptr); 
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tmp = *ptr; 
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(*ptr)+= 1; 
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privateUnlock(ptr); 
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return tmp; 
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#endif 
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} 
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Uint32 
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SDL_AtomicFetchThenDecrement32(volatile Uint32 * ptr) 
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{ 
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#ifdef nativeFetchThenDecrement32 
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return __sync_fetch_and_sub(ptr, 1); 
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#else 
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Uint32 tmp = 0; 
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privateWaitLock(ptr); 
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226 
tmp = *ptr; 
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227 
(*ptr) = 1; 
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privateUnlock(ptr); 
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229 

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230 
return tmp; 
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#endif 
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232 
} 
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233 

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234 
Uint32 
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235 
SDL_AtomicFetchThenAdd32(volatile Uint32 * ptr, Uint32 value) 
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{ 
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237 
#ifdef nativeFetchThenAdd32 
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238 
return __sync_fetch_and_add(ptr, value); 
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239 
#else 
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240 
Uint32 tmp = 0; 
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241 

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242 
privateWaitLock(ptr); 
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243 
tmp = *ptr; 
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244 
(*ptr)+= value; 
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245 
privateUnlock(ptr); 
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246 

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247 
return tmp; 
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248 
#endif 
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249 
} 
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250 

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251 
Uint32 
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252 
SDL_AtomicFetchThenSubtract32(volatile Uint32 * ptr, Uint32 value) 
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253 
{ 
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254 
#ifdef nativeFetchThenSubtract32 
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255 
return __sync_fetch_and_sub(ptr, value); 
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256 
#else 
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257 
Uint32 tmp = 0; 
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259 
privateWaitLock(ptr); 
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260 
tmp = *ptr; 
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261 
(*ptr)= value; 
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262 
privateUnlock(ptr); 
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263 

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264 
return tmp; 
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265 
#endif 
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266 
} 
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267 

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268 
Uint32 
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269 
SDL_AtomicIncrementThenFetch32(volatile Uint32 * ptr) 
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270 
{ 
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271 
#ifdef nativeIncrementThenFetch32 
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272 
return __sync_add_and_fetch(ptr, 1); 
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273 
#else 
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274 
Uint32 tmp = 0; 
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276 
privateWaitLock(ptr); 
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277 
(*ptr)+= 1; 
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278 
tmp = *ptr; 
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279 
privateUnlock(ptr); 
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280 

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281 
return tmp; 
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282 
#endif 
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283 
} 
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284 

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285 
Uint32 
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286 
SDL_AtomicDecrementThenFetch32(volatile Uint32 * ptr) 
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287 
{ 
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288 
#ifdef nativeDecrementThenFetch32 
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289 
return __sync_sub_and_fetch(ptr, 1); 
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290 
#else 
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291 
Uint32 tmp = 0; 
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292 

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293 
privateWaitLock(ptr); 
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294 
(*ptr)= 1; 
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295 
tmp = *ptr; 
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296 
privateUnlock(ptr); 
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297 

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298 
return tmp; 
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299 
#endif 
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300 
} 
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301 

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302 
Uint32 
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303 
SDL_AtomicAddThenFetch32(volatile Uint32 * ptr, Uint32 value) 
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304 
{ 
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305 
#ifdef nativeAddThenFetch32 
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306 
return __sync_add_and_fetch(ptr, value); 
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307 
#else 
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308 
Uint32 tmp = 0; 
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309 

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310 
privateWaitLock(ptr); 
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311 
(*ptr)+= value; 
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312 
tmp = *ptr; 
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313 
privateUnlock(ptr); 
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314 

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315 
return tmp; 
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316 
#endif 
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317 
} 
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318 

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319 
Uint32 
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320 
SDL_AtomicSubtractThenFetch32(volatile Uint32 * ptr, Uint32 value) 
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321 
{ 
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322 
#ifdef nativeSubtractThenFetch32 
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323 
return __sync_sub_and_fetch(ptr, value); 
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324 
#else 
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325 
Uint32 tmp = 0; 
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326 

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327 
privateWaitLock(ptr); 
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328 
(*ptr)= value; 
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329 
tmp = *ptr; 
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330 
privateUnlock(ptr); 
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331 

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332 
return tmp; 
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333 
#endif 
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diff
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334 
} 
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This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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diff
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335 

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336 
/* 64 bit atomic operations */ 
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337 
#ifdef SDL_HAS_64BIT_TYPE 
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diff
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338 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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parents:
diff
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339 
SDL_bool 
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volitile... duh, yeah the variable need to be labeled volitile
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340 
SDL_AtomicTestThenSet64(volatile Uint64 * ptr) 
3199
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This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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parents:
diff
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341 
{ 
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342 
#ifdef nativeTestThenSet64 
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343 
return 0 == __sync_lock_test_and_set(ptr, 1); 
3202
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344 
#else 
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345 
SDL_bool result = SDL_FALSE; 
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346 

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347 
privateWaitLock(ptr); 
3202
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348 
result = (*ptr == 0); 
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349 
if (result) 
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350 
{ 
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351 
*ptr = 1; 
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352 
} 
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The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
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353 
privateUnlock(ptr); 
3202
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354 

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I've made so many changes I don't dare continue until I check the current stuff in.
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changeset

355 
return result; 
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356 
#endif 
3199
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This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
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diff
changeset

357 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

358 

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This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

359 
void 
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volitile... duh, yeah the variable need to be labeled volitile
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parents:
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changeset

360 
SDL_AtomicClear64(volatile Uint64 * ptr) 
3199
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This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

361 
{ 
3202
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362 
#ifdef nativeClear64 
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363 
__sync_lock_test_and_set(ptr, 0); 
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
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364 
return; 
3202
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365 
#else 
3261
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The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
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366 
privateWaitLock(ptr); 
3202
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367 
*ptr = 0; 
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The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
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368 
privateUnlock(ptr); 
3202
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369 

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I've made so many changes I don't dare continue until I check the current stuff in.
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changeset

370 
return; 
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I've made so many changes I don't dare continue until I check the current stuff in.
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parents:
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changeset

371 
#endif 
3199
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This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

372 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

373 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

374 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
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changeset

375 
SDL_AtomicFetchThenIncrement64(volatile Uint64 * ptr) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

376 
{ 
3202
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parents:
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changeset

377 
#ifdef nativeFetchThenIncrement64 
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The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
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378 
return __sync_fetch_and_add(ptr, 1); 
3202
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379 
#else 
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This is a cosmetic fix, I found a stupid typo
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parents:
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changeset

380 
Uint64 tmp = 0; 
3202
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Bob Pendleton <bob@pendleton.com>
parents:
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changeset

381 

3261
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The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

382 
privateWaitLock(ptr); 
3202
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I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
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changeset

383 
tmp = *ptr; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
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changeset

384 
(*ptr)+= 1; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
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changeset

385 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

386 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
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diff
changeset

387 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
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changeset

388 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

389 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

390 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

391 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

392 
SDL_AtomicFetchThenDecrement64(volatile Uint64 * ptr) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

393 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
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changeset

394 
#ifdef nativeFetchThenDecrement64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

395 
return __sync_fetch_and_sub(ptr, 1); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
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changeset

396 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

397 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

398 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

399 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

400 
tmp = *ptr; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

401 
(*ptr) = 1; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

402 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

403 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

404 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

405 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

406 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

407 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

408 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

409 
SDL_AtomicFetchThenAdd64(volatile Uint64 * ptr, Uint64 value) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

410 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

411 
#ifdef nativeFetchThenAdd64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

412 
return __sync_fetch_and_add(ptr, value); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

413 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

414 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

415 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

416 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

417 
tmp = *ptr; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

418 
(*ptr)+= value; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

419 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

420 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

421 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

422 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

423 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

424 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

425 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

426 
SDL_AtomicFetchThenSubtract64(volatile Uint64 * ptr, Uint64 value) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

427 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

428 
#ifdef nativeFetchThenSubtract64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

429 
return __sync_fetch_and_sub(ptr, value); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

430 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

431 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

432 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

433 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

434 
tmp = *ptr; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

435 
(*ptr)= value; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

436 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

437 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

438 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

439 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

440 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

441 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

442 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

443 
SDL_AtomicIncrementThenFetch64(volatile Uint64 * ptr) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

444 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

445 
#ifdef nativeIncrementThenFetch64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

446 
return __sync_add_and_fetch(ptr, 1); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

447 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

448 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

449 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

450 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

451 
(*ptr)+= 1; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

452 
tmp = *ptr; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

453 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

454 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

455 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

456 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

457 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

458 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

459 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

460 
SDL_AtomicDecrementThenFetch64(volatile Uint64 * ptr) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

461 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

462 
#ifdef nativeDecrementThenFetch64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

463 
return __sync_sub_and_fetch(ptr, 1); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

464 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

465 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

466 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

467 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

468 
(*ptr)= 1; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

469 
tmp = *ptr; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

470 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

471 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

472 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

473 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

474 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

475 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

476 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

477 
SDL_AtomicAddThenFetch64(volatile Uint64 * ptr, Uint64 value) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

478 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

479 
#ifdef nativeAddThenFetch64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

480 
return __sync_add_and_fetch(ptr, value); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

481 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

482 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

483 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

484 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

485 
(*ptr)+= value; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

486 
tmp = *ptr; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

487 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

488 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

489 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

490 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

491 
} 
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

492 

3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

493 
Uint64 
3216
48a80f2a7ff2
volitile... duh, yeah the variable need to be labeled volitile
Bob Pendleton <bob@pendleton.com>
parents:
3212
diff
changeset

494 
SDL_AtomicSubtractThenFetch64(volatile Uint64 * ptr, Uint64 value) 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

495 
{ 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

496 
#ifdef nativeSubtractThenFetch64 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

497 
return __sync_sub_and_fetch(ptr, value); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

498 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

499 
Uint64 tmp = 0; 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

500 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

501 
privateWaitLock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

502 
(*ptr)= value; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

503 
tmp = *ptr; 
3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

504 
privateUnlock(ptr); 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

505 

3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

506 
return tmp; 
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

507 
#endif 
3199
3e1bf2b8bd81
This check in updates SDL_atomic.h to reflect the new set of atomic operations in 32 and 64 bit form.
Bob Pendleton <bob@pendleton.com>
parents:
diff
changeset

508 
} 
3202
3aa519a5c676
I've made so many changes I don't dare continue until I check the current stuff in.
Bob Pendleton <bob@pendleton.com>
parents:
3201
diff
changeset

509 

3261
72b542f34739
The new, cleaner, version of the atomic operations. The dummy code is what you should start working with to port atomic ops.
Bob Pendleton <bob@pendleton.com>
parents:
3216
diff
changeset

510 
#endif /* SDL_HAS_64BIT_TYPE */ 