diff options
Diffstat (limited to 'lib/System/Atomic.cpp')
| -rw-r--r-- | lib/System/Atomic.cpp | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/System/Atomic.cpp b/lib/System/Atomic.cpp index 416f981df8..6e751a30d4 100644 --- a/lib/System/Atomic.cpp +++ b/lib/System/Atomic.cpp @@ -78,4 +78,17 @@ sys::cas_flag sys::AtomicDecrement(volatile sys::cas_flag* ptr) { #endif } +sys::cas_flag sys::AtomicAdd(volatile sys::cas_flag* ptr, sys::cas_flag val) { +#if LLVM_MULTITHREADED==0 + *ptr += val; + return *ptr; +#elif defined(__GNUC__) + return __sync_add_and_fetch(ptr, val); +#elif defined(_MSC_VER) + return InterlockedAdd(ptr, val); +#else +# error No atomic add implementation for your platform! +#endif +} + |