author  Sam Lantinga <slouken@libsdl.org> 
Thu, 24 Dec 2009 19:16:08 +0000  
changeset 3598  427ff6d745df 
parent 3552  3889325ca987 
child 3697  f7b03b6838cb 
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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#define WIN32_LEAN_AND_MEAN 
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#include <windows.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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WIN32 VERSION. 
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This makes use of native Windows atomic operations. 
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*/ 
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/* 
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Native spinlock routines. Because this is the dummy implementation 
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these will always call SDL_SetError() and do nothing. 
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void 
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SDL_AtomicLock(SDL_SpinLock *lock) 
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{ 
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long volatile * l = (long volatile *)lock; 
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Uint32 old = 0; 
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Uint32 new = 1; 
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old = InterlockedExchange(l, new); 
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while(1 == old) 
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{ 
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old = InterlockedExchange(l, new); 
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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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long volatile * l = (long volatile *)lock; 
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Uint32 new = 0; 
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InterlockedExchange(l, new); 
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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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#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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/* 
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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 is 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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long volatile * p = (long volatile *)ptr; 
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Uint32 new = 1; 
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return 0 == InterlockedExchange(p, new); 
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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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long volatile * p = (long volatile *)ptr; 
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Uint32 new = 0; 
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InterlockedExchange(p, new); 
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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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long volatile * p = (long volatile *)ptr; 
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return InterlockedExchangeAdd(p, 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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long volatile * p = (long volatile *)ptr; 
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return InterlockedExchangeAdd(p, 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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234 

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SDL_AtomicFetchThenAdd32(volatile Uint32 * ptr, Uint32 value) 
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{ 
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#ifdef nativeFetchThenAdd32 
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long volatile * p = (long volatile *)ptr; 
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240 

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241 
return InterlockedExchangeAdd(p, value); 
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242 
#else 
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Uint32 tmp = 0; 
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245 
privateWaitLock(ptr); 
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246 
tmp = *ptr; 
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247 
(*ptr)+= value; 
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248 
privateUnlock(ptr); 
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249 

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250 
return tmp; 
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251 
#endif 
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252 
} 
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253 

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254 
Uint32 
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255 
SDL_AtomicFetchThenSubtract32(volatile Uint32 * ptr, Uint32 value) 
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256 
{ 
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257 
#ifdef nativeFetchThenSubtract32 
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long volatile * p = (long volatile *)ptr; 
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259 

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260 
return InterlockedExchangeAdd(p, (0  value)); 
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261 
#else 
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Uint32 tmp = 0; 
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264 
privateWaitLock(ptr); 
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265 
tmp = *ptr; 
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266 
(*ptr)= value; 
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267 
privateUnlock(ptr); 
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268 

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269 
return tmp; 
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270 
#endif 
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271 
} 
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272 

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273 
Uint32 
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274 
SDL_AtomicIncrementThenFetch32(volatile Uint32 * ptr) 
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275 
{ 
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#ifdef nativeIncrementThenFetch32 
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long volatile * p = (LONG volatile *)ptr; 
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278 

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279 
return InterlockedIncrement(p); 
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280 
#else 
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281 
Uint32 tmp = 0; 
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282 

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283 
privateWaitLock(ptr); 
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284 
(*ptr)+= 1; 
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285 
tmp = *ptr; 
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286 
privateUnlock(ptr); 
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287 

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288 
return tmp; 
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289 
#endif 
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290 
} 
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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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291 

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292 
Uint32 
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293 
SDL_AtomicDecrementThenFetch32(volatile Uint32 * ptr) 
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294 
{ 
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295 
#ifdef nativeDecrementThenFetch32 
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296 
long volatile * p = (LONG volatile *)ptr; 
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297 

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298 
return InterlockedDecrement(p); 
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299 
#else 
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300 
Uint32 tmp = 0; 
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301 

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302 
privateWaitLock(ptr); 
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303 
(*ptr)= 1; 
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304 
tmp = *ptr; 
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305 
privateUnlock(ptr); 
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306 

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307 
return tmp; 
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308 
#endif 
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309 
} 
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310 

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311 
Uint32 
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312 
SDL_AtomicAddThenFetch32(volatile Uint32 * ptr, Uint32 value) 
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313 
{ 
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314 
#ifdef nativeAddThenFetch32 
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315 
long volatile * p = (long volatile *)ptr; 
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316 

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317 
return InterlockedExchangeAdd(p, value) + value; 
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318 
#else 
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319 
Uint32 tmp = 0; 
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320 

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321 
privateWaitLock(ptr); 
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322 
(*ptr)+= value; 
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323 
tmp = *ptr; 
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324 
privateUnlock(ptr); 
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325 

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326 
return tmp; 
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327 
#endif 
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328 
} 
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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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329 

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330 
Uint32 
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331 
SDL_AtomicSubtractThenFetch32(volatile Uint32 * ptr, Uint32 value) 
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332 
{ 
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333 
#ifdef nativeSubtractThenFetch32 
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334 
long volatile * p = (long volatile *)ptr; 
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335 

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336 
return InterlockedExchangeAdd(p, (0  value))  value; 
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337 
#else 
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338 
Uint32 tmp = 0; 
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339 

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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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340 
privateWaitLock(ptr); 
3202
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341 
(*ptr)= value; 
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342 
tmp = *ptr; 
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343 
privateUnlock(ptr); 
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344 

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345 
return tmp; 
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346 
#endif 
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347 
} 
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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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348 

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349 
/* 64 bit atomic operations */ 
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350 
#ifdef SDL_HAS_64BIT_TYPE 
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351 

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352 
SDL_bool 
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353 
SDL_AtomicTestThenSet64(volatile Uint64 * ptr) 
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354 
{ 
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355 
#ifdef nativeTestThenSet64 
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356 
#else 
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357 
SDL_bool result = SDL_FALSE; 
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358 

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359 
privateWaitLock(ptr); 
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360 
result = (*ptr == 0); 
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361 
if (result) 
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362 
{ 
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363 
*ptr = 1; 
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364 
} 
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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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365 
privateUnlock(ptr); 
3202
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366 

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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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367 
return result; 
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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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368 
#endif 
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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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369 
} 
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>
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370 

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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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371 
void 
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372 
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.
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373 
{ 
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374 
#ifdef nativeClear64 
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375 
#else 
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376 
privateWaitLock(ptr); 
3202
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377 
*ptr = 0; 
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378 
privateUnlock(ptr); 
3202
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379 

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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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380 
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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381 
#endif 
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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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382 
} 
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

383 

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

384 
Uint64 
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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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385 
SDL_AtomicFetchThenIncrement64(volatile Uint64 * ptr) 
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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>
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386 
{ 
3202
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387 
#ifdef nativeFetchThenIncrement64 
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388 
#else 
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389 
Uint64 tmp = 0; 
3202
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390 

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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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391 
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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392 
tmp = *ptr; 
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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

393 
(*ptr)+= 1; 
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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394 
privateUnlock(ptr); 
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>
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changeset

395 

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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396 
return tmp; 
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>
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397 
#endif 
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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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398 
} 
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

399 

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>
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changeset

400 
Uint64 
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

401 
SDL_AtomicFetchThenDecrement64(volatile Uint64 * ptr) 
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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402 
{ 
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

403 
#ifdef nativeFetchThenDecrement64 
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>
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404 
#else 
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>
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changeset

405 
Uint64 tmp = 0; 
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>
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changeset

406 

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

407 
privateWaitLock(ptr); 
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

408 
tmp = *ptr; 
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

409 
(*ptr) = 1; 
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

410 
privateUnlock(ptr); 
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

411 

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

412 
return tmp; 
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

413 
#endif 
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

414 
} 
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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diff
changeset

415 

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

416 
Uint64 
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

417 
SDL_AtomicFetchThenAdd64(volatile Uint64 * ptr, Uint64 value) 
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

418 
{ 
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

419 
#ifdef nativeFetchThenAdd64 
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>
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changeset

420 
#else 
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

421 
Uint64 tmp = 0; 
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

422 

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>
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changeset

423 
privateWaitLock(ptr); 
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

424 
tmp = *ptr; 
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

425 
(*ptr)+= value; 
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

426 
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:
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diff
changeset

427 

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

428 
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:
3199
diff
changeset

429 
#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

430 
} 
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

431 

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

432 
Uint64 
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:
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changeset

433 
SDL_AtomicFetchThenSubtract64(volatile Uint64 * ptr, Uint64 value) 
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

434 
{ 
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

435 
#ifdef nativeFetchThenSubtract64 
3202
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Bob Pendleton <bob@pendleton.com>
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changeset

436 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
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diff
changeset

437 
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:
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diff
changeset

438 

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:
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changeset

439 
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:
3199
diff
changeset

440 
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:
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changeset

441 
(*ptr)= value; 
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

442 
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:
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diff
changeset

443 

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

444 
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:
3199
diff
changeset

445 
#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

446 
} 
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

447 

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

448 
Uint64 
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:
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diff
changeset

449 
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

450 
{ 
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

451 
#ifdef nativeIncrementThenFetch64 
3202
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changeset

452 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

453 
Uint64 tmp = 0; 
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454 

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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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changeset

455 
privateWaitLock(ptr); 
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

456 
(*ptr)+= 1; 
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

457 
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:
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diff
changeset

458 
privateUnlock(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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diff
changeset

459 

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:
3199
diff
changeset

460 
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:
3199
diff
changeset

461 
#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

462 
} 
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

463 

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

464 
Uint64 
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:
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diff
changeset

465 
SDL_AtomicDecrementThenFetch64(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

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:
3212
diff
changeset

467 
#ifdef nativeDecrementThenFetch64 
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>
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changeset

468 
#else 
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This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
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diff
changeset

469 
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:
3199
diff
changeset

470 

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:
3212
diff
changeset

471 
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:
3199
diff
changeset

472 
(*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:
3199
diff
changeset

473 
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:
3212
diff
changeset

474 
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:
3199
diff
changeset

475 

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:
3199
diff
changeset

476 
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:
3199
diff
changeset

477 
#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

478 
} 
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

479 

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

480 
Uint64 
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:
3212
diff
changeset

481 
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

482 
{ 
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:
3199
diff
changeset

483 
#ifdef nativeAddThenFetch64 
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

484 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

485 
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:
3199
diff
changeset

486 

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:
3212
diff
changeset

487 
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:
3199
diff
changeset

488 
(*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:
3199
diff
changeset

489 
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:
3212
diff
changeset

490 
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:
3199
diff
changeset

491 

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:
3199
diff
changeset

492 
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:
3199
diff
changeset

493 
#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

494 
} 
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 

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

496 
Uint64 
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:
3212
diff
changeset

497 
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

498 
{ 
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:
3199
diff
changeset

499 
#ifdef nativeSubtractThenFetch64 
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

500 
#else 
3212
759032c318d8
This is a cosmetic fix, I found a stupid typo
Bob Pendleton <bob@pendleton.com>
parents:
3202
diff
changeset

501 
Uint64 tmp = 0; 
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

502 

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:
3212
diff
changeset

503 
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:
3199
diff
changeset

504 
(*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:
3199
diff
changeset

505 
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:
3212
diff
changeset

506 
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:
3199
diff
changeset

507 

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:
3199
diff
changeset

508 
return tmp; 
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

509 
#endif 
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:
3199
diff
changeset

510 
} 
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

511 
#endif 
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:
3199
diff
changeset

512 