/platform/external/webkit/WebCore/bindings/js/WorkerScriptController.h

 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 WorkerScriptController_h
28#define WorkerScriptController_h
29
30#if ENABLE(WORKERS)
31
32#include <runtime/Protect.h>
33#include <wtf/Noncopyable.h>
34#include <wtf/Threading.h>
35
36namespace JSC {
37    class JSGlobalData;
38}
39
40namespace WebCore {
41
42    class JSWorkerContext;
43    class ScriptSourceCode;
44    class ScriptValue;
45    class String;
46    class WorkerContext;
47
48    class WorkerScriptController : public Noncopyable {
49    public:
50        WorkerScriptController(WorkerContext*);
51        ~WorkerScriptController();
52
53        JSWorkerContext* workerContextWrapper()
54        {
55            initScriptIfNeeded();
56            return m_workerContextWrapper;
57        }
58
59        ScriptValue evaluate(const ScriptSourceCode&);
60        ScriptValue evaluate(const ScriptSourceCode&, ScriptValue* exception);
61
62        void setException(ScriptValue);
63
64        void forbidExecution();
65
66        JSC::JSGlobalData* globalData() { return m_globalData.get(); }
67
68    private:
69        void initScriptIfNeeded()
70        {
71            if (!m_workerContextWrapper)
72                initScript();
73        }
74        void initScript();
75
76        RefPtr<JSC::JSGlobalData> m_globalData;
77        WorkerContext* m_workerContext;
78        JSC::ProtectedPtr<JSWorkerContext> m_workerContextWrapper;
79
80        Mutex m_sharedDataMutex;
81        bool m_executionForbidden;
82    };
83
84} // namespace WebCore
85
86#endif // ENABLE(WORKERS)
87
88#endif // WorkerScriptController_h