| /* |
| * Copyright (C) 2013 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. |
| * * 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 ExecutionContextTask_h |
| #define ExecutionContextTask_h |
| |
| #include "core/CoreExport.h" |
| #include "wtf/Allocator.h" |
| #include "wtf/Functional.h" |
| #include "wtf/Noncopyable.h" |
| #include "wtf/PtrUtil.h" |
| #include "wtf/text/WTFString.h" |
| |
| namespace blink { |
| |
| class ExecutionContext; |
| |
| class CORE_EXPORT ExecutionContextTask { |
| WTF_MAKE_NONCOPYABLE(ExecutionContextTask); |
| USING_FAST_MALLOC(ExecutionContextTask); |
| public: |
| ExecutionContextTask() { } |
| virtual ~ExecutionContextTask() { } |
| virtual void performTask(ExecutionContext*) = 0; |
| virtual String taskNameForInstrumentation() const { return String(); } |
| }; |
| |
| namespace internal { |
| |
| template<WTF::FunctionThreadAffinity threadAffinity> |
| void runCallClosureTask(std::unique_ptr<Function<void(), threadAffinity>> closure, ExecutionContext*) |
| { |
| (*closure)(); |
| } |
| |
| template<WTF::FunctionThreadAffinity threadAffinity> |
| void runCallClosureTask(std::unique_ptr<Function<void(ExecutionContext*), threadAffinity>> closure, ExecutionContext* executionContext) |
| { |
| (*closure)(executionContext); |
| } |
| |
| template<typename T, WTF::FunctionThreadAffinity threadAffinity> |
| class CallClosureTask final : public ExecutionContextTask { |
| public: |
| static std::unique_ptr<CallClosureTask> create(std::unique_ptr<Function<T, threadAffinity>> closure) |
| { |
| return wrapUnique(new CallClosureTask(std::move(closure))); |
| } |
| |
| private: |
| explicit CallClosureTask(std::unique_ptr<Function<T, threadAffinity>> closure) |
| : m_closure(std::move(closure)) |
| { |
| } |
| |
| void performTask(ExecutionContext* executionContext) override |
| { |
| runCallClosureTask(std::move(m_closure), executionContext); |
| } |
| |
| std::unique_ptr<Function<T, threadAffinity>> m_closure; |
| }; |
| |
| // Do not use |create| other than in createCrossThreadTask and |
| // createSameThreadTask. |
| // See http://crbug.com/390851 |
| template<typename T, WTF::FunctionThreadAffinity threadAffinity> |
| std::unique_ptr<CallClosureTask<T, threadAffinity>> createCallClosureTask(std::unique_ptr<Function<T, threadAffinity>> closure) |
| { |
| return CallClosureTask<T, threadAffinity>::create(std::move(closure)); |
| } |
| |
| } // namespace internal |
| |
| // Create tasks passed within a single thread. |
| // When posting tasks within a thread, use |createSameThreadTask| instead |
| // of using |bind| directly to state explicitly that there is no need to care |
| // about thread safety when posting the task. |
| // When posting tasks across threads, use |createCrossThreadTask|. |
| template<typename FunctionType, typename... P> |
| std::unique_ptr<ExecutionContextTask> createSameThreadTask( |
| FunctionType function, P&&... parameters) |
| { |
| return internal::createCallClosureTask(WTF::bind(function, std::forward<P>(parameters)...)); |
| } |
| |
| } // namespace blink |
| |
| #endif |