diff options
Diffstat (limited to 'src/win/async.c')
| -rw-r--r-- | src/win/async.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/win/async.c b/src/win/async.c index b904676e..4c2cd265 100644 --- a/src/win/async.c +++ b/src/win/async.c @@ -23,10 +23,28 @@ #include "uv.h" #include "internal.h" -#include "atomicops-inl.h" #include "handle-inl.h" #include "req-inl.h" +#ifdef _MSC_VER /* MSVC */ + +/* _InterlockedOr8 is supported by MSVC on x32 and x64. It is slightly less + * efficient than InterlockedExchange, but InterlockedExchange8 does not exist, + * and interlocked operations on larger targets might require the target to be + * aligned. */ +#pragma intrinsic(_InterlockedOr8) + +static char uv__atomic_exchange_set(char volatile* target) { + return _InterlockedOr8(target, 1); +} + +#else /* GCC, Clang in mingw mode */ + +static char uv__atomic_exchange_set(char volatile* target) { + return __sync_fetch_and_or(target, 1); +} + +#endif /* _MSC_VER */ void uv__async_endgame(uv_loop_t* loop, uv_async_t* handle) { if (handle->flags & UV_HANDLE_CLOSING && |