1 /* 2 * Copyright (C) 2013 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 * * Neither the name of Google Inc. nor the names of its 11 * contributors may be used to endorse or promote products derived from 12 * this software without specific prior written permission. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 15 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 17 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 18 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 20 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #ifndef ExecutionContextTask_h 28 #define ExecutionContextTask_h 29 30 #include "wtf/FastAllocBase.h" 31 #include "wtf/Functional.h" 32 #include "wtf/Noncopyable.h" 33 #include "wtf/PassOwnPtr.h" 34 35 namespace WebCore { 36 37 class ExecutionContext; 38 39 class ExecutionContextTask { 40 WTF_MAKE_NONCOPYABLE(ExecutionContextTask); 41 WTF_MAKE_FAST_ALLOCATED; 42 public: 43 ExecutionContextTask() { } 44 virtual ~ExecutionContextTask() { } 45 virtual void performTask(ExecutionContext*) = 0; 46 // Certain tasks get marked specially so that they aren't discarded, and are executed, when the context is shutting down its message queue. 47 virtual bool isCleanupTask() const { return false; } 48 }; 49 50 class CallClosureTask : public ExecutionContextTask { 51 public: 52 static PassOwnPtr<CallClosureTask> create(const Closure& closure) 53 { 54 return adoptPtr(new CallClosureTask(closure)); 55 } 56 virtual void performTask(ExecutionContext*) OVERRIDE { m_closure(); } 57 58 private: 59 explicit CallClosureTask(const Closure& closure) : m_closure(closure) { } 60 Closure m_closure; 61 }; 62 63 } // namespace 64 65 #endif 66
