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      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 
     36 namespace JSC {
     37     class JSGlobalData;
     38 }
     39 
     40 namespace 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
     89