diff options
| author |  scroggo@google.com <scroggo@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-07-16 16:51:28 +0000 |
|---|---|---|
| committer | scroggo@google.com <scroggo@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2012-07-16 16:51:28 +0000 |
| commit | 50ccb0a73865b0d0f0dd48989dbf5aa4a27f4a72 (patch) | |
| tree | fa3fbb1819cd8474e4edd9c1486d771a76cf7093 /src/ports/SkThread_win.cpp | |
| parent | 70d1be5f9447bfeba59fedc8283ac734dc89a0e2 (diff) | |
Add a skia method to perform an atomic add.
Complements sk_atomic_inc for when you want to increase by more than one.
This time, use the correct atomic add function on Windows.
Reviewed at https://codereview.appspot.com/6399050/
Review URL: https://codereview.appspot.com/6407048
git-svn-id: http://skia.googlecode.com/svn/trunk@4623 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'src/ports/SkThread_win.cpp')
| -rw-r--r-- | src/ports/SkThread_win.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/ports/SkThread_win.cpp b/src/ports/SkThread_win.cpp index e833314843..91a5ceb7ec 100644 --- a/src/ports/SkThread_win.cpp +++ b/src/ports/SkThread_win.cpp @@ -16,7 +16,7 @@ //intrinsic, include intrin.h and put the function in a #pragma intrinsic //directive. //The pragma appears to be unnecessary, but doesn't hurt. -#pragma intrinsic(_InterlockedIncrement, _InterlockedDecrement) +#pragma intrinsic(_InterlockedIncrement, _InterlockedExchangeAdd, _InterlockedDecrement) #pragma intrinsic(_InterlockedCompareExchange) int32_t sk_atomic_inc(int32_t* addr) { @@ -24,6 +24,11 @@ int32_t sk_atomic_inc(int32_t* addr) { return _InterlockedIncrement(reinterpret_cast<LONG*>(addr)) - 1; } +int32_t sk_atomic_add(int32_t* addr, int32_t inc) { + return _InterlockedExchangeAdd(reinterpret_cast<LONG*>(addr), + static_cast<LONG>(inc)); +} + int32_t sk_atomic_dec(int32_t* addr) { return _InterlockedDecrement(reinterpret_cast<LONG*>(addr)) + 1; } |