37 lines
854 B
C++
37 lines
854 B
C++
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/synchronization/lock_impl.h"
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namespace base {
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namespace internal {
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LockImpl::LockImpl() {
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// The second parameter is the spin count, for short-held locks it avoid the
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// contending thread from going to sleep which helps performance greatly.
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::InitializeCriticalSectionAndSpinCount(&os_lock_, 2000);
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}
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LockImpl::~LockImpl() {
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::DeleteCriticalSection(&os_lock_);
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}
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bool LockImpl::Try() {
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if (::TryEnterCriticalSection(&os_lock_) != FALSE) {
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return true;
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}
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return false;
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}
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void LockImpl::Lock() {
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::EnterCriticalSection(&os_lock_);
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}
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void LockImpl::Unlock() {
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::LeaveCriticalSection(&os_lock_);
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}
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} // namespace internal
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} // namespace base
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