Index: Source/WTF/wtf/Atomics.h |
diff --git a/Source/WTF/wtf/Atomics.h b/Source/WTF/wtf/Atomics.h |
deleted file mode 100644 |
index d760f2231419535d5373a1d7ed3cb8c867807f8b..0000000000000000000000000000000000000000 |
--- a/Source/WTF/wtf/Atomics.h |
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@@ -1,236 +0,0 @@ |
-/* |
- * Copyright (C) 2007, 2008, 2010, 2012 Apple Inc. All rights reserved. |
- * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) |
- * |
- * Redistribution and use in source and binary forms, with or without |
- * modification, are permitted provided that the following conditions |
- * are met: |
- * |
- * 1. Redistributions of source code must retain the above copyright |
- * notice, this list of conditions and the following disclaimer. |
- * 2. Redistributions in binary form must reproduce the above copyright |
- * notice, this list of conditions and the following disclaimer in the |
- * documentation and/or other materials provided with the distribution. |
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
- * its contributors may be used to endorse or promote products derived |
- * from this software without specific prior written permission. |
- * |
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- * |
- * |
- * Note: The implementations of InterlockedIncrement and InterlockedDecrement are based |
- * on atomic_increment and atomic_exchange_and_add from the Boost C++ Library. The license |
- * is virtually identical to the Apple license above but is included here for completeness. |
- * |
- * Boost Software License - Version 1.0 - August 17th, 2003 |
- * |
- * Permission is hereby granted, free of charge, to any person or organization |
- * obtaining a copy of the software and accompanying documentation covered by |
- * this license (the "Software") to use, reproduce, display, distribute, |
- * execute, and transmit the Software, and to prepare derivative works of the |
- * Software, and to permit third-parties to whom the Software is furnished to |
- * do so, all subject to the following: |
- * |
- * The copyright notices in the Software and this entire statement, including |
- * the above license grant, this restriction and the following disclaimer, |
- * must be included in all copies of the Software, in whole or in part, and |
- * all derivative works of the Software, unless such copies or derivative |
- * works are solely in the form of machine-executable object code generated by |
- * a source language processor. |
- * |
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
- * FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
- * SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
- * FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
- * DEALINGS IN THE SOFTWARE. |
- */ |
- |
-#ifndef Atomics_h |
-#define Atomics_h |
- |
-#include <wtf/Platform.h> |
-#include <wtf/StdLibExtras.h> |
-#include <wtf/UnusedParam.h> |
- |
-#if OS(WINDOWS) |
-#include <windows.h> |
-#elif OS(QNX) |
-#include <atomic.h> |
-#elif OS(ANDROID) |
-#include <sys/atomics.h> |
-#endif |
- |
-namespace WTF { |
- |
-#if OS(WINDOWS) |
-#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1 |
- |
-#if OS(WINCE) |
-inline int atomicIncrement(int* addend) { return InterlockedIncrement(reinterpret_cast<long*>(addend)); } |
-inline int atomicDecrement(int* addend) { return InterlockedDecrement(reinterpret_cast<long*>(addend)); } |
-#elif COMPILER(MINGW) || COMPILER(MSVC7_OR_LOWER) |
-inline int atomicIncrement(int* addend) { return InterlockedIncrement(reinterpret_cast<long*>(addend)); } |
-inline int atomicDecrement(int* addend) { return InterlockedDecrement(reinterpret_cast<long*>(addend)); } |
- |
-inline int64_t atomicIncrement(int64_t* addend) { return InterlockedIncrement64(reinterpret_cast<long long*>(addend)); } |
-inline int64_t atomicDecrement(int64_t* addend) { return InterlockedDecrement64(reinterpret_cast<long long*>(addend)); } |
-#else |
-inline int atomicIncrement(int volatile* addend) { return InterlockedIncrement(reinterpret_cast<long volatile*>(addend)); } |
-inline int atomicDecrement(int volatile* addend) { return InterlockedDecrement(reinterpret_cast<long volatile*>(addend)); } |
- |
-inline int64_t atomicIncrement(int64_t volatile* addend) { return InterlockedIncrement64(reinterpret_cast<long long volatile*>(addend)); } |
-inline int64_t atomicDecrement(int64_t volatile* addend) { return InterlockedDecrement64(reinterpret_cast<long long volatile*>(addend)); } |
-#endif |
- |
-#elif OS(QNX) |
-#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1 |
- |
-// Note, atomic_{add, sub}_value() return the previous value of addend's content. |
-inline int atomicIncrement(int volatile* addend) { return static_cast<int>(atomic_add_value(reinterpret_cast<unsigned volatile*>(addend), 1)) + 1; } |
-inline int atomicDecrement(int volatile* addend) { return static_cast<int>(atomic_sub_value(reinterpret_cast<unsigned volatile*>(addend), 1)) - 1; } |
- |
-#elif OS(ANDROID) |
-#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1 |
- |
-// Note, __atomic_{inc, dec}() return the previous value of addend's content. |
-inline int atomicIncrement(int volatile* addend) { return __atomic_inc(addend) + 1; } |
-inline int atomicDecrement(int volatile* addend) { return __atomic_dec(addend) - 1; } |
- |
-#elif COMPILER(GCC) && !CPU(SPARC64) // sizeof(_Atomic_word) != sizeof(int) on sparc64 gcc |
-#define WTF_USE_LOCKFREE_THREADSAFEREFCOUNTED 1 |
- |
-inline int atomicIncrement(int volatile* addend) { return __sync_add_and_fetch(addend, 1); } |
-inline int atomicDecrement(int volatile* addend) { return __sync_sub_and_fetch(addend, 1); } |
- |
-inline int64_t atomicIncrement(int64_t volatile* addend) { return __sync_add_and_fetch(addend, 1); } |
-inline int64_t atomicDecrement(int64_t volatile* addend) { return __sync_sub_and_fetch(addend, 1); } |
- |
-#endif |
- |
-#if OS(WINDOWS) |
-inline bool weakCompareAndSwap(volatile unsigned* location, unsigned expected, unsigned newValue) |
-{ |
-#if OS(WINCE) |
- return InterlockedCompareExchange(reinterpret_cast<LONG*>(const_cast<unsigned*>(location)), static_cast<LONG>(newValue), static_cast<LONG>(expected)) == static_cast<LONG>(expected); |
-#else |
- return InterlockedCompareExchange(reinterpret_cast<LONG volatile*>(location), static_cast<LONG>(newValue), static_cast<LONG>(expected)) == static_cast<LONG>(expected); |
-#endif |
-} |
- |
-inline bool weakCompareAndSwap(void*volatile* location, void* expected, void* newValue) |
-{ |
- return InterlockedCompareExchangePointer(location, newValue, expected) == expected; |
-} |
-#else // OS(WINDOWS) --> not windows |
-#if COMPILER(GCC) && !COMPILER(CLANG) // Work around a gcc bug |
-inline bool weakCompareAndSwap(volatile unsigned* location, unsigned expected, unsigned newValue) |
-#else |
-inline bool weakCompareAndSwap(unsigned* location, unsigned expected, unsigned newValue) |
-#endif |
-{ |
-#if ENABLE(COMPARE_AND_SWAP) |
-#if CPU(X86) || CPU(X86_64) |
- unsigned char result; |
- asm volatile( |
- "lock; cmpxchgl %3, %2\n\t" |
- "sete %1" |
- : "+a"(expected), "=q"(result), "+m"(*location) |
- : "r"(newValue) |
- : "memory" |
- ); |
-#elif CPU(ARM_THUMB2) |
- unsigned tmp; |
- unsigned result; |
- asm volatile( |
- "movw %1, #1\n\t" |
- "ldrex %2, %0\n\t" |
- "cmp %3, %2\n\t" |
- "bne.n 0f\n\t" |
- "strex %1, %4, %0\n\t" |
- "0:" |
- : "+Q"(*location), "=&r"(result), "=&r"(tmp) |
- : "r"(expected), "r"(newValue) |
- : "memory"); |
- result = !result; |
-#else |
-#error "Bad architecture for compare and swap." |
-#endif |
- return result; |
-#else |
- UNUSED_PARAM(location); |
- UNUSED_PARAM(expected); |
- UNUSED_PARAM(newValue); |
- CRASH(); |
- return false; |
-#endif |
-} |
- |
-inline bool weakCompareAndSwap(void*volatile* location, void* expected, void* newValue) |
-{ |
-#if ENABLE(COMPARE_AND_SWAP) |
-#if CPU(X86_64) |
- bool result; |
- asm volatile( |
- "lock; cmpxchgq %3, %2\n\t" |
- "sete %1" |
- : "+a"(expected), "=q"(result), "+m"(*location) |
- : "r"(newValue) |
- : "memory" |
- ); |
- return result; |
-#else |
- return weakCompareAndSwap(bitwise_cast<unsigned*>(location), bitwise_cast<unsigned>(expected), bitwise_cast<unsigned>(newValue)); |
-#endif |
-#else // ENABLE(COMPARE_AND_SWAP) |
- UNUSED_PARAM(location); |
- UNUSED_PARAM(expected); |
- UNUSED_PARAM(newValue); |
- CRASH(); |
- return 0; |
-#endif // ENABLE(COMPARE_AND_SWAP) |
-} |
-#endif // OS(WINDOWS) (end of the not-windows case) |
- |
-inline bool weakCompareAndSwapUIntPtr(volatile uintptr_t* location, uintptr_t expected, uintptr_t newValue) |
-{ |
- return weakCompareAndSwap(reinterpret_cast<void*volatile*>(location), reinterpret_cast<void*>(expected), reinterpret_cast<void*>(newValue)); |
-} |
- |
-#if CPU(ARM_THUMB2) |
- |
-inline void memoryBarrierAfterLock() |
-{ |
- asm volatile("dmb" ::: "memory"); |
-} |
- |
-inline void memoryBarrierBeforeUnlock() |
-{ |
- asm volatile("dmb" ::: "memory"); |
-} |
- |
-#else |
- |
-inline void memoryBarrierAfterLock() { } |
-inline void memoryBarrierBeforeUnlock() { } |
- |
-#endif |
- |
-} // namespace WTF |
- |
-#if USE(LOCKFREE_THREADSAFEREFCOUNTED) |
-using WTF::atomicDecrement; |
-using WTF::atomicIncrement; |
-#endif |
- |
-#endif // Atomics_h |