diff options
| -rw-r--r-- | include/llvm/System/Atomic.h | 1 | ||||
| -rw-r--r-- | lib/System/Atomic.cpp | 13 |
2 files changed, 14 insertions, 0 deletions
diff --git a/include/llvm/System/Atomic.h b/include/llvm/System/Atomic.h index adbb975298..c4049d40da 100644 --- a/include/llvm/System/Atomic.h +++ b/include/llvm/System/Atomic.h @@ -26,6 +26,7 @@ namespace llvm { cas_flag old_value); cas_flag AtomicIncrement(volatile cas_flag* ptr); cas_flag AtomicDecrement(volatile cas_flag* ptr); + cas_flag AtomicAdd(volatile cas_flag* ptr, cas_flag val); } } 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 +} + |