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windows: move uv_atomic_exchange_set to atomicops-inl.h

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This commit is contained in:
Bert Belder 2012-08-14 01:04:43 +02:00
parent 4442ddcaae
commit 7fb43d3c5b
3 changed files with 59 additions and 30 deletions
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32
src/win/async.c
View File

@ -23,39 +23,11 @@
#include "uv.h"
#include "internal.h"
#include "atomicops-inl.h"
#include "handle-inl.h"
#include "req-inl.h"
/* Atomic set operation on char */
#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 __declspec(inline) uv_atomic_exchange_set(char volatile* target) {
return _InterlockedOr8(target, 1);
}
#else /* GCC */
/* Mingw-32 version, hopefully this works for 64-bit gcc as well. */
static inline char uv_atomic_exchange_set(char volatile* target) {
const char one = 1;
char old_value;
__asm__ __volatile__ ("lock xchgb %0, %1\n\t"
: "=r"(old_value), "=m"(*target)
: "0"(one), "m"(*target)
: "memory");
return old_value;
}
#endif
void uv_async_endgame(uv_loop_t* loop, uv_async_t* handle) {
if (handle->flags & UV_HANDLE_CLOSING &&
!handle->async_sent) {
@ -105,7 +77,7 @@ int uv_async_send(uv_async_t* handle) {
/* or closed handle. */
assert(!(handle->flags & UV_HANDLE_CLOSING));
if (!uv_atomic_exchange_set(&handle->async_sent)) {
if (!uv__atomic_exchange_set(&handle->async_sent)) {
POST_COMPLETION_FOR_REQ(loop, &handle->async_req);
}

56
src/win/atomicops-inl.h Normal file
View File

@ -0,0 +1,56 @@
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef UV_WIN_ATOMICOPS_INL_H_
#define UV_WIN_ATOMICOPS_INL_H_
#include "uv.h"
/* Atomic set operation on char */
#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 __declspec(inline) uv__atomic_exchange_set(char volatile* target) {
return _InterlockedOr8(target, 1);
}
#else /* GCC */
/* Mingw-32 version, hopefully this works for 64-bit gcc as well. */
static inline char uv__atomic_exchange_set(char volatile* target) {
const char one = 1;
char old_value;
__asm__ __volatile__ ("lock xchgb %0, %1\n\t"
: "=r"(old_value), "=m"(*target)
: "0"(one), "m"(*target)
: "memory");
return old_value;
}
#endif
#endif /* UV_WIN_ATOMICOPS_INL_H_ */

1
uv.gyp
View File

@ -59,6 +59,7 @@
'sources': [
'include/uv-private/uv-win.h',
'src/win/async.c',
'src/win/atomicops-inl.h',
'src/win/core.c',
'src/win/dl.c',
'src/win/error.c',