diff options
Diffstat (limited to 'lib/System/Atomic.cpp')
| -rw-r--r-- | lib/System/Atomic.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/System/Atomic.cpp b/lib/System/Atomic.cpp index 2827d88965..9d8ac925b8 100644 --- a/lib/System/Atomic.cpp +++ b/lib/System/Atomic.cpp @@ -51,3 +51,31 @@ sys::cas_flag sys::CompareAndSwap(volatile sys::cas_flag* ptr, # error No compare-and-swap implementation for your platform! #endif } + +sys::cas_flag sys::AtomicPostIncrement(volatile sys::cas_flag* ptr) { +#if LLVM_MULTITHREADED==0 + ++(*ptr); + return *ptr; +#elif defined(__GNUC__) + return __sync_add_and_fetch(ptr, 1); +#elif defined(_MSC_VER) + return InterlockedCompareExchange(ptr, new_value, old_value); +#else +# error No atomic increment implementation for your platform! +#endif +} + +sys::cas_flag sys::AtomicPostDecrement(volatile sys::cas_flag* ptr) { +#if LLVM_MULTITHREADED==0 + --(*ptr); + return *ptr; +#elif defined(__GNUC__) + return __sync_sub_and_fetch(ptr, 1); +#elif defined(_MSC_VER) + return InterlockedIncrement(ptr); +#else +# error No atomic decrement implementation for your platform! +#endif +} + + |