1 /* 2 * Copyright (C) 2009 Google 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 are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 32 #ifndef WorkerContextExecutionProxy_h 33 #define WorkerContextExecutionProxy_h 34 35 #if ENABLE(WORKERS) 36 37 #include "ScriptValue.h" 38 #include <v8.h> 39 #include <wtf/text/TextPosition.h> 40 #include <wtf/OwnPtr.h> 41 #include <wtf/Vector.h> 42 43 namespace WebCore { 44 45 class Event; 46 class EventTarget; 47 class WorkerContext; 48 49 struct WorkerContextExecutionState { 50 WorkerContextExecutionState() : hadException(false), lineNumber(0) { } 51 52 bool hadException; 53 ScriptValue exception; 54 String errorMessage; 55 int lineNumber; 56 String sourceURL; 57 }; 58 59 class WorkerContextExecutionProxy { 60 public: 61 WorkerContextExecutionProxy(WorkerContext*); 62 ~WorkerContextExecutionProxy(); 63 64 // Track the event so that we can detach it from the JS wrapper when a worker 65 // terminates. This is needed because we need to be able to dispose these 66 // events and releases references to their event targets: WorkerContext. 67 void trackEvent(Event*); 68 69 // Evaluate a script file in the current execution environment. 70 ScriptValue evaluate(const String& script, const String& fileName, const TextPosition0& scriptStartPosition, WorkerContextExecutionState*); 71 72 // Returns a local handle of the context. 73 v8::Local<v8::Context> context() { return v8::Local<v8::Context>::New(m_context); } 74 75 private: 76 void initV8IfNeeded(); 77 bool initContextIfNeeded(); 78 void dispose(); 79 80 // Run an already compiled script. 81 v8::Local<v8::Value> runScript(v8::Handle<v8::Script>); 82 83 static bool forgetV8EventObject(Event*); 84 85 static const int kWorkerMaxStackSize = 500 * 1024; 86 87 WorkerContext* m_workerContext; 88 v8::Persistent<v8::Context> m_context; 89 int m_recursion; 90 91 Vector<Event*> m_events; 92 }; 93 94 } // namespace WebCore 95 96 #endif // ENABLE(WORKERS) 97 98 #endif // WorkerContextExecutionProxy_h 99
