1/*
2 * Copyright (C) 2008 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#if ENABLE(WORKERS)
31
32#include "AbstractWorker.h"
33#include "ActiveDOMObject.h"
34#include "AtomicStringHash.h"
35#include "EventListener.h"
36#include "EventNames.h"
37#include "EventTarget.h"
38#include "MessagePort.h"
39#include "WorkerScriptLoaderClient.h"
40#include <wtf/OwnPtr.h>
41#include <wtf/PassRefPtr.h>
42#include <wtf/RefCounted.h>
43#include <wtf/RefPtr.h>
44
45namespace WebCore {
46
47    class ScriptExecutionContext;
48    class String;
49    class WorkerContextProxy;
50    class WorkerScriptLoader;
51
52    typedef int ExceptionCode;
53
54    class Worker : public AbstractWorker, private WorkerScriptLoaderClient {
55    public:
56        static PassRefPtr<Worker> create(const String& url, ScriptExecutionContext* context, ExceptionCode& ec) { return adoptRef(new Worker(url, context, ec)); }
57        ~Worker();
58
59        virtual Worker* toWorker() { return this; }
60
61        void postMessage(PassRefPtr<SerializedScriptValue>, ExceptionCode&);
62        void postMessage(PassRefPtr<SerializedScriptValue>, const MessagePortArray*, ExceptionCode&);
63        // FIXME: remove this when we update the ObjC bindings (bug #28774).
64        void postMessage(PassRefPtr<SerializedScriptValue> message, MessagePort*, ExceptionCode&);
65
66        void terminate();
67
68        virtual bool canSuspend() const;
69        virtual void stop();
70        virtual bool hasPendingActivity() const;
71
72        DEFINE_ATTRIBUTE_EVENT_LISTENER(message);
73
74    private:
75        Worker(const String&, ScriptExecutionContext*, ExceptionCode&);
76
77        virtual void notifyFinished();
78
79        virtual void refEventTarget() { ref(); }
80        virtual void derefEventTarget() { deref(); }
81
82        OwnPtr<WorkerScriptLoader> m_scriptLoader;
83        WorkerContextProxy* m_contextProxy; // The proxy outlives the worker to perform thread shutdown.
84    };
85
86} // namespace WebCore
87
88#endif // ENABLE(WORKERS)
89
90#endif // Worker_h
91