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-rw-r--r--WebCore/platform/MessageQueue.h115
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diff --git a/WebCore/platform/MessageQueue.h b/WebCore/platform/MessageQueue.h
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--- a/WebCore/platform/MessageQueue.h
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-/*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef MessageQueue_h
-#define MessageQueue_h
-
-#include "Threading.h"
-#include <wtf/Assertions.h>
-#include <wtf/Deque.h>
-#include <wtf/Noncopyable.h>
-
-namespace WebCore {
-
- template<typename DataType>
- class MessageQueue : Noncopyable {
- public:
- MessageQueue() : m_killed(false) {}
-
- void append(const DataType&);
- void prepend(const DataType&);
- bool waitForMessage(DataType&);
- bool tryGetMessage(DataType&);
- void kill();
- bool killed() const { return m_killed; }
-
- private:
- Mutex m_mutex;
- ThreadCondition m_condition;
- Deque<DataType> m_queue;
- bool m_killed;
- };
-
- template<typename DataType>
- inline void MessageQueue<DataType>::append(const DataType& message)
- {
- MutexLocker lock(m_mutex);
- m_queue.append(message);
- m_condition.signal();
- }
-
- template<typename DataType>
- inline void MessageQueue<DataType>::prepend(const DataType& message)
- {
- MutexLocker lock(m_mutex);
- m_queue.prepend(message);
- m_condition.signal();
- }
-
- template<typename DataType>
- inline bool MessageQueue<DataType>::waitForMessage(DataType& result)
- {
- MutexLocker lock(m_mutex);
- if (m_killed)
- return false;
-
- if (m_queue.isEmpty())
- m_condition.wait(m_mutex);
- if (m_killed)
- return false;
-
- ASSERT(!m_queue.isEmpty());
- result = m_queue.first();
- m_queue.removeFirst();
- return true;
- }
-
- template<typename DataType>
- inline bool MessageQueue<DataType>::tryGetMessage(DataType& result)
- {
- MutexLocker lock(m_mutex);
- if (m_killed)
- return false;
- if (m_queue.isEmpty())
- return false;
-
- result = m_queue.first();
- m_queue.removeFirst();
- return true;
- }
-
- template<typename DataType>
- inline void MessageQueue<DataType>::kill()
- {
- MutexLocker lock(m_mutex);
- m_killed = true;
- m_condition.broadcast();
- }
-}
-
-#endif // MessageQueue_h