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comparison: dom/plugins/ipc/ScopedMethodFactory.h
dom/plugins/ipc/ScopedMethodFactory.h
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef mozilla_plugins_ScopedMethodFactory_h | |
| 6 #define mozilla_plugins_ScopedMethodFactory_h | |
| 7 | |
| 8 #include <base/task.h> | |
| 9 | |
| 10 /* | |
| 11 * This is based on the ScopedRunnableMethodFactory from ipc/chromium/src/base/task.h | |
| 12 * Chromiums factories assert if tasks are created and run on different threads, | |
| 13 * which is something we need to do in PluginModuleParent (hang UI vs. main thread). | |
| 14 * ScopedMethodFactory just provides cancellable tasks that don't assert this. | |
| 15 */ | |
| 16 | |
| 17 namespace mozilla { | |
| 18 namespace plugins { | |
| 19 | |
| 20 template<class T> | |
| 21 class ScopedMethodFactory : public RevocableStore | |
| 22 { | |
| 23 private: | |
| 24 template<class TaskType> | |
| 25 class TaskWrapper : public TaskType | |
| 26 { | |
| 27 public: | |
| 28 explicit TaskWrapper(RevocableStore* store) : revocable_(store) { } | |
| 29 | |
| 30 virtual void Run() { | |
| 31 if (!revocable_.revoked()) | |
| 32 TaskType::Run(); | |
| 33 } | |
| 34 | |
| 35 private: | |
| 36 Revocable revocable_; | |
| 37 }; | |
| 38 | |
| 39 public: | |
| 40 explicit ScopedMethodFactory(T* object) : object_(object) { } | |
| 41 | |
| 42 template <class Method> | |
| 43 inline Task* NewRunnableMethod(Method method) { | |
| 44 typedef TaskWrapper<RunnableMethod<Method, Tuple0> > TaskWrapper; | |
| 45 | |
| 46 TaskWrapper* task = new TaskWrapper(this); | |
| 47 task->Init(object_, method, MakeTuple()); | |
| 48 return task; | |
| 49 } | |
| 50 | |
| 51 template <class Method, class A> | |
| 52 inline Task* NewRunnableMethod(Method method, const A& a) { | |
| 53 typedef TaskWrapper<RunnableMethod<Method, Tuple1<A> > > TaskWrapper; | |
| 54 | |
| 55 TaskWrapper* task = new TaskWrapper(this); | |
| 56 task->Init(object_, method, MakeTuple(a)); | |
| 57 return task; | |
| 58 } | |
| 59 | |
| 60 protected: | |
| 61 template <class Method, class Params> | |
| 62 class RunnableMethod : public Task { | |
| 63 public: | |
| 64 RunnableMethod() { } | |
| 65 | |
| 66 void Init(T* obj, Method meth, const Params& params) { | |
| 67 obj_ = obj; | |
| 68 meth_ = meth; | |
| 69 params_ = params; | |
| 70 } | |
| 71 | |
| 72 virtual void Run() { DispatchToMethod(obj_, meth_, params_); } | |
| 73 | |
| 74 private: | |
| 75 T* obj_; | |
| 76 Method meth_; | |
| 77 Params params_; | |
| 78 }; | |
| 79 | |
| 80 private: | |
| 81 T* object_; | |
| 82 }; | |
| 83 | |
| 84 } // namespace plugins | |
| 85 } // namespace mozilla | |
| 86 | |
| 87 #endif // mozilla_plugins_ScopedMethodFactory_h |
