diff options
Diffstat (limited to 'Source/WTF/wtf/Atomics.h')
| -rw-r--r-- | Source/WTF/wtf/Atomics.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/Source/WTF/wtf/Atomics.h b/Source/WTF/wtf/Atomics.h index d30926897..d70c72a1f 100644 --- a/Source/WTF/wtf/Atomics.h +++ b/Source/WTF/wtf/Atomics.h @@ -118,6 +118,17 @@ inline int atomicDecrement(int volatile* addend) { return __gnu_cxx::__exchange_ #endif +#if OS(WINDOWS) +inline bool weakCompareAndSwap(volatile unsigned* location, unsigned expected, unsigned newValue) +{ + return InterlockedCompareExchange(reinterpret_cast<LONG volatile*>(location), static_cast<LONG>(newValue), static_cast<LONG>(expected)) == static_cast<LONG>(expected); +} + +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 @@ -184,6 +195,7 @@ inline bool weakCompareAndSwap(void*volatile* location, void* expected, void* ne 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) { |