1/*
2 * Copyright (C) 2008, 2010 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 */
26
27#ifndef Worker_h
28#define Worker_h
29
30#include "core/dom/ActiveDOMObject.h"
31#include "core/dom/MessagePort.h"
32#include "core/events/EventListener.h"
33#include "core/events/EventTarget.h"
34#include "core/workers/AbstractWorker.h"
35#include "core/workers/WorkerScriptLoaderClient.h"
36#include "platform/heap/Handle.h"
37#include "wtf/Forward.h"
38#include "wtf/PassRefPtr.h"
39#include "wtf/RefPtr.h"
40#include "wtf/text/AtomicStringHash.h"
41
42namespace blink {
43
44class ExceptionState;
45class ExecutionContext;
46class WorkerGlobalScopeProxy;
47class WorkerScriptLoader;
48
49class Worker FINAL : public AbstractWorker, private WorkerScriptLoaderClient {
50    DEFINE_WRAPPERTYPEINFO();
51public:
52    static PassRefPtrWillBeRawPtr<Worker> create(ExecutionContext*, const String& url, ExceptionState&);
53    virtual ~Worker();
54
55    virtual const AtomicString& interfaceName() const OVERRIDE;
56
57    void postMessage(ExecutionContext*, PassRefPtr<SerializedScriptValue> message, const MessagePortArray*, ExceptionState&);
58
59    void terminate();
60
61    virtual void stop() OVERRIDE;
62    virtual bool hasPendingActivity() const OVERRIDE;
63
64    DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
65
66    virtual void trace(Visitor*) OVERRIDE;
67
68private:
69    explicit Worker(ExecutionContext*);
70
71    // WorkerScriptLoaderClient callbacks
72    virtual void didReceiveResponse(unsigned long identifier, const ResourceResponse&) OVERRIDE;
73    virtual void notifyFinished() OVERRIDE;
74
75    RefPtr<WorkerScriptLoader> m_scriptLoader;
76    WorkerGlobalScopeProxy* m_contextProxy; // The proxy outlives the worker to perform thread shutdown.
77};
78
79} // namespace blink
80
81#endif // Worker_h
82