1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
/*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``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 COMPUTER, INC. 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 WorkerMessagingProxy_h
#define WorkerMessagingProxy_h
#if ENABLE(WORKERS)
#include "ScriptExecutionContext.h"
#include "WorkerContextProxy.h"
#include "WorkerLoaderProxy.h"
#include "WorkerObjectProxy.h"
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
#include <wtf/PassOwnPtr.h>
#include <wtf/PassRefPtr.h>
#include <wtf/RefPtr.h>
#include <wtf/Vector.h>
namespace WebCore {
class DedicatedWorkerThread;
class ScriptExecutionContext;
class Worker;
class WorkerMessagingProxy : public WorkerContextProxy, public WorkerObjectProxy, public WorkerLoaderProxy {
WTF_MAKE_NONCOPYABLE(WorkerMessagingProxy); WTF_MAKE_FAST_ALLOCATED;
public:
WorkerMessagingProxy(Worker*);
// Implementations of WorkerContextProxy.
// (Only use these methods in the worker object thread.)
virtual void startWorkerContext(const KURL& scriptURL, const String& userAgent, const String& sourceCode);
virtual void terminateWorkerContext();
virtual void postMessageToWorkerContext(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>);
virtual bool hasPendingActivity() const;
virtual void workerObjectDestroyed();
// Implementations of WorkerObjectProxy.
// (Only use these methods in the worker context thread.)
virtual void postMessageToWorkerObject(PassRefPtr<SerializedScriptValue>, PassOwnPtr<MessagePortChannelArray>);
virtual void postExceptionToWorkerObject(const String& errorMessage, int lineNumber, const String& sourceURL);
virtual void postConsoleMessageToWorkerObject(MessageSource, MessageType, MessageLevel, const String& message, int lineNumber, const String& sourceURL);
virtual void confirmMessageFromWorkerObject(bool hasPendingActivity);
virtual void reportPendingActivity(bool hasPendingActivity);
virtual void workerContextClosed();
virtual void workerContextDestroyed();
// Implementation of WorkerLoaderProxy.
// These methods are called on different threads to schedule loading
// requests and to send callbacks back to WorkerContext.
virtual void postTaskToLoader(PassOwnPtr<ScriptExecutionContext::Task>);
virtual void postTaskForModeToWorkerContext(PassOwnPtr<ScriptExecutionContext::Task>, const String& mode);
void workerThreadCreated(PassRefPtr<DedicatedWorkerThread>);
// Only use this method on the worker object thread.
bool askedToTerminate() const { return m_askedToTerminate; }
private:
friend class MessageWorkerTask;
friend class WorkerContextDestroyedTask;
friend class WorkerExceptionTask;
friend class WorkerThreadActivityReportTask;
virtual ~WorkerMessagingProxy();
void workerContextDestroyedInternal();
void reportPendingActivityInternal(bool confirmingMessage, bool hasPendingActivity);
Worker* workerObject() const { return m_workerObject; }
RefPtr<ScriptExecutionContext> m_scriptExecutionContext;
Worker* m_workerObject;
RefPtr<DedicatedWorkerThread> m_workerThread;
unsigned m_unconfirmedMessageCount; // Unconfirmed messages from worker object to worker thread.
bool m_workerThreadHadPendingActivity; // The latest confirmation from worker thread reported that it was still active.
bool m_askedToTerminate;
Vector<OwnPtr<ScriptExecutionContext::Task> > m_queuedEarlyTasks; // Tasks are queued here until there's a thread object created.
};
} // namespace WebCore
#endif // ENABLE(WORKERS)
#endif // WorkerMessagingProxy_h
|
