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/*
* Copyright (C) 2009 Google 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:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
* OWNER OR 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 WorkerRunLoop_h
#define WorkerRunLoop_h
#if ENABLE(WORKERS)
#include "ScriptExecutionContext.h"
#include <wtf/MessageQueue.h>
#include <wtf/OwnPtr.h>
#include <wtf/PassOwnPtr.h>
namespace WebCore {
class ModePredicate;
class WorkerContext;
class WorkerSharedTimer;
class WorkerRunLoop {
public:
WorkerRunLoop();
~WorkerRunLoop();
// Blocking call. Waits for tasks and timers, invokes the callbacks.
void run(WorkerContext*);
// Waits for a single task and returns.
MessageQueueWaitResult runInMode(WorkerContext*, const String& mode);
void terminate();
bool terminated() { return m_messageQueue.killed(); }
void postTask(PassOwnPtr<ScriptExecutionContext::Task>);
void postTaskForMode(PassOwnPtr<ScriptExecutionContext::Task>, const String& mode);
unsigned long createUniqueId() { return ++m_uniqueId; }
static String defaultMode();
class Task {
WTF_MAKE_NONCOPYABLE(Task); WTF_MAKE_FAST_ALLOCATED;
public:
static PassOwnPtr<Task> create(PassOwnPtr<ScriptExecutionContext::Task> task, const String& mode);
~Task() { }
const String& mode() const { return m_mode; }
void performTask(ScriptExecutionContext* context);
private:
Task(PassOwnPtr<ScriptExecutionContext::Task> task, const String& mode);
OwnPtr<ScriptExecutionContext::Task> m_task;
String m_mode;
};
private:
friend class RunLoopSetup;
MessageQueueWaitResult runInMode(WorkerContext*, const ModePredicate&);
MessageQueue<Task> m_messageQueue;
OwnPtr<WorkerSharedTimer> m_sharedTimer;
int m_nestedCount;
unsigned long m_uniqueId;
};
} // namespace WebCore
#endif // ENABLE(WORKERS)
#endif // WorkerRunLoop_h
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