security/sandbox/chromium/base/synchronization/lock_impl_win.cc@7e26c7da4463
security/sandbox/chromium/base/synchronization/lock_impl_win.cc
Wed, 31 Dec 2014 06:55:50 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:55:50 +0100
- changeset 2
- 7e26c7da4463
- permissions
- -rw-r--r--
Added tag UPSTREAM_283F7C6 for changeset ca08bd8f51b2
1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "base/synchronization/lock_impl.h"
7 namespace base {
8 namespace internal {
10 LockImpl::LockImpl() {
11 // The second parameter is the spin count, for short-held locks it avoid the
12 // contending thread from going to sleep which helps performance greatly.
13 ::InitializeCriticalSectionAndSpinCount(&native_handle_, 2000);
14 }
16 LockImpl::~LockImpl() {
17 ::DeleteCriticalSection(&native_handle_);
18 }
20 bool LockImpl::Try() {
21 if (::TryEnterCriticalSection(&native_handle_) != FALSE) {
22 return true;
23 }
24 return false;
25 }
27 void LockImpl::Lock() {
28 ::EnterCriticalSection(&native_handle_);
29 }
31 void LockImpl::Unlock() {
32 ::LeaveCriticalSection(&native_handle_);
33 }
35 } // namespace internal
36 } // namespace base
