blob: bb8a23d898a694e96165050aba76b7e40be8046c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/synchronization/lock_impl.h"
namespace base {
namespace internal {
LockImpl::LockImpl() {
// The second parameter is the spin count, for short-held locks it avoid the
// contending thread from going to sleep which helps performance greatly.
::InitializeCriticalSectionAndSpinCount(&os_lock_, 2000);
}
LockImpl::~LockImpl() {
::DeleteCriticalSection(&os_lock_);
}
bool LockImpl::Try() {
if (::TryEnterCriticalSection(&os_lock_) != FALSE) {
return true;
}
return false;
}
void LockImpl::Lock() {
::EnterCriticalSection(&os_lock_);
}
void LockImpl::Unlock() {
::LeaveCriticalSection(&os_lock_);
}
} // namespace internal
} // namespace base
|
