| /* |
| * Copyright (C) 2009 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 |
| |
| #if ENABLE(WORKERS) |
| |
| #include <wtf/OwnPtr.h> |
| #include <wtf/Threading.h> |
| |
| namespace WebCore { |
| |
| class ScriptSourceCode; |
| class ScriptValue; |
| class WorkerContext; |
| class WorkerContextExecutionProxy; |
| |
| class WorkerScriptController { |
| public: |
| WorkerScriptController(WorkerContext*); |
| ~WorkerScriptController(); |
| |
| WorkerContextExecutionProxy* proxy() { return m_proxy.get(); } |
| WorkerContext* workerContext() { return m_workerContext; } |
| |
| ScriptValue evaluate(const ScriptSourceCode&); |
| ScriptValue evaluate(const ScriptSourceCode&, ScriptValue* exception); |
| |
| void setException(ScriptValue); |
| |
| // Async request to terminate a future JS execution. Eventually causes termination |
| // exception raised during JS execution, if the worker thread happens to run JS. |
| // After JS execution was terminated in this way, the Worker thread has to use |
| // forbidExecution()/isExecutionForbidden() to guard against reentry into JS. |
| // Can be called from any thread. |
| void scheduleExecutionTermination(); |
| |
| // Called on Worker thread when JS exits with termination exception caused by forbidExecution() request, |
| // or by Worker thread termination code to prevent future entry into JS. |
| void forbidExecution(); |
| bool isExecutionForbidden() const; |
| |
| // Returns WorkerScriptController for the currently executing context. 0 will be returned if the current executing context is not the worker context. |
| static WorkerScriptController* controllerForContext(); |
| |
| private: |
| WorkerContext* m_workerContext; |
| OwnPtr<WorkerContextExecutionProxy> m_proxy; |
| bool m_executionForbidden; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // ENABLE(WORKERS) |
| |
| #endif // WorkerScriptController_h |