37 lines
854 B
C++
37 lines
854 B
C++
// 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
|