/* * Copyright (C) 2011 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: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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 CallbackTask_h #define CallbackTask_h #if ENABLE(MEDIA_STREAM) #include "ScriptExecutionContext.h" #include <wtf/Forward.h> #include <wtf/PassRefPtr.h> #include <wtf/RefPtr.h> namespace WebCore { // Helper template to schedule calls to callbacks using their own script execution context. // CallbackType is assumed to implement Scheduler and to be reference-counted. template <typename CallbackType, typename ArgumentType> class CallbackTask1 : public ScriptExecutionContext::Task { public: static PassOwnPtr<CallbackTask1> create(PassRefPtr<CallbackType> callback, PassRefPtr<ArgumentType> data) { return adoptPtr(new CallbackTask1(callback, data)); } virtual void performTask(ScriptExecutionContext*) { m_callback->handleEvent(m_data.get()); } class Scheduler { public: bool scheduleCallback(ScriptExecutionContext* context, PassRefPtr<ArgumentType> data) { if (context) { context->postTask(CallbackTask1<CallbackType, ArgumentType>::create(static_cast<CallbackType*>(this), data)); return true; } return false; } }; private: CallbackTask1(PassRefPtr<CallbackType> callback, PassRefPtr<ArgumentType> data) : m_callback(callback) , m_data(data) { } RefPtr<CallbackType> m_callback; RefPtr<ArgumentType> m_data; }; } #endif // ENABLE(MEDIA_STREAM) #endif // CallbackTask_h