diff options
| author | Owen Anderson <resistor@mac.com> | 2009-06-23 17:39:31 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2009-06-23 17:39:31 +0000 |
| commit | 5a9c0eeaf23a498de19c805395cc0e2762dbf3d3 (patch) | |
| tree | def143fec6c5f9440ec541ed7058cf551be413b1 /lib/System | |
| parent | 3b8d135879bd045d63174064c6879eaa6581ec00 (diff) | |
| download | llvm-5a9c0eeaf23a498de19c805395cc0e2762dbf3d3.tar.gz llvm-5a9c0eeaf23a498de19c805395cc0e2762dbf3d3.tar.bz2 llvm-5a9c0eeaf23a498de19c805395cc0e2762dbf3d3.tar.xz | |
Add an atomic add operation.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73964 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/System')
| -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 +} + |