| /* |
| * Copyright (C) 2009, 2012 Google 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: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "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 THE COPYRIGHT |
| * OWNER 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 WorkerScriptController_h |
| #define WorkerScriptController_h |
| |
| #include "bindings/core/v8/ScriptValue.h" |
| #include "bindings/core/v8/V8Binding.h" |
| #include "wtf/OwnPtr.h" |
| #include "wtf/ThreadingPrimitives.h" |
| #include "wtf/text/TextPosition.h" |
| #include <v8.h> |
| |
| namespace blink { |
| |
| class ErrorEvent; |
| class ExceptionState; |
| class ScriptSourceCode; |
| class WorkerGlobalScope; |
| |
| class WorkerScriptController { |
| public: |
| explicit WorkerScriptController(WorkerGlobalScope&); |
| ~WorkerScriptController(); |
| |
| bool isExecutionForbidden() const; |
| bool isExecutionTerminating() const; |
| void evaluate(const ScriptSourceCode&, RefPtrWillBeRawPtr<ErrorEvent>* = 0); |
| |
| // Prevents future JavaScript execution. See |
| // scheduleExecutionTermination, isExecutionForbidden. |
| void forbidExecution(); |
| |
| // Used by WorkerThread: |
| bool initializeContextIfNeeded(); |
| // Async request to terminate future JavaScript execution on the |
| // worker thread. JavaScript evaluation exits with a |
| // non-continuable exception and WorkerScriptController calls |
| // forbidExecution to prevent further JavaScript execution. Use |
| // forbidExecution()/isExecutionForbidden() to guard against |
| // reentry into JavaScript. |
| void scheduleExecutionTermination(); |
| |
| // Used by WorkerGlobalScope: |
| void rethrowExceptionFromImportedScript(PassRefPtrWillBeRawPtr<ErrorEvent>, ExceptionState&); |
| void disableEval(const String&); |
| // Send a notification about current thread is going to be idle. |
| // Returns true if the embedder should stop calling idleNotification |
| // until real work has been done. |
| bool idleNotification() { return m_isolate->IdleNotification(1000); } |
| |
| // Used by Inspector agents: |
| ScriptState* scriptState() { return m_scriptState.get(); } |
| |
| // Used by V8 bindings: |
| v8::Local<v8::Context> context() { return m_scriptState ? m_scriptState->context() : v8::Local<v8::Context>(); } |
| |
| private: |
| class WorkerGlobalScopeExecutionState; |
| |
| bool isContextInitialized() { return m_scriptState && !!m_scriptState->perContextData(); } |
| |
| // Evaluate a script file in the current execution environment. |
| ScriptValue evaluate(const String& script, const String& fileName, const TextPosition& scriptStartPosition); |
| |
| v8::Isolate* m_isolate; |
| WorkerGlobalScope& m_workerGlobalScope; |
| RefPtr<ScriptState> m_scriptState; |
| RefPtr<DOMWrapperWorld> m_world; |
| String m_disableEvalPending; |
| bool m_executionForbidden; |
| bool m_executionScheduledToTerminate; |
| mutable Mutex m_scheduledTerminationMutex; |
| |
| // |m_globalScopeExecutionState| refers to a stack object |
| // that evaluate() allocates; evaluate() ensuring that the |
| // pointer reference to it is removed upon returning. Hence |
| // kept as a bare pointer here, and not a Persistent with |
| // Oilpan enabled; stack scanning will visit the object and |
| // trace its on-heap fields. |
| GC_PLUGIN_IGNORE("394615") |
| WorkerGlobalScopeExecutionState* m_globalScopeExecutionState; |
| OwnPtr<V8IsolateInterruptor> m_interruptor; |
| }; |
| |
| } // namespace blink |
| |
| #endif // WorkerScriptController_h |