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// 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(&native_handle_, 2000);
}
LockImpl::~LockImpl() {
::DeleteCriticalSection(&native_handle_);
}
bool LockImpl::Try() {
if (::TryEnterCriticalSection(&native_handle_) != FALSE) {
return true;
}
return false;
}
void LockImpl::Lock() {
::EnterCriticalSection(&native_handle_);
}
void LockImpl::Unlock() {
::LeaveCriticalSection(&native_handle_);
}
} // namespace internal
} // namespace base
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