1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/plugins/ipc/ScopedMethodFactory.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,87 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.6 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifndef mozilla_plugins_ScopedMethodFactory_h
1.9 +#define mozilla_plugins_ScopedMethodFactory_h
1.10 +
1.11 +#include <base/task.h>
1.12 +
1.13 +/*
1.14 + * This is based on the ScopedRunnableMethodFactory from ipc/chromium/src/base/task.h
1.15 + * Chromiums factories assert if tasks are created and run on different threads,
1.16 + * which is something we need to do in PluginModuleParent (hang UI vs. main thread).
1.17 + * ScopedMethodFactory just provides cancellable tasks that don't assert this.
1.18 + */
1.19 +
1.20 +namespace mozilla {
1.21 +namespace plugins {
1.22 +
1.23 +template<class T>
1.24 +class ScopedMethodFactory : public RevocableStore
1.25 +{
1.26 +private:
1.27 + template<class TaskType>
1.28 + class TaskWrapper : public TaskType
1.29 + {
1.30 + public:
1.31 + explicit TaskWrapper(RevocableStore* store) : revocable_(store) { }
1.32 +
1.33 + virtual void Run() {
1.34 + if (!revocable_.revoked())
1.35 + TaskType::Run();
1.36 + }
1.37 +
1.38 + private:
1.39 + Revocable revocable_;
1.40 + };
1.41 +
1.42 +public:
1.43 + explicit ScopedMethodFactory(T* object) : object_(object) { }
1.44 +
1.45 + template <class Method>
1.46 + inline Task* NewRunnableMethod(Method method) {
1.47 + typedef TaskWrapper<RunnableMethod<Method, Tuple0> > TaskWrapper;
1.48 +
1.49 + TaskWrapper* task = new TaskWrapper(this);
1.50 + task->Init(object_, method, MakeTuple());
1.51 + return task;
1.52 + }
1.53 +
1.54 + template <class Method, class A>
1.55 + inline Task* NewRunnableMethod(Method method, const A& a) {
1.56 + typedef TaskWrapper<RunnableMethod<Method, Tuple1<A> > > TaskWrapper;
1.57 +
1.58 + TaskWrapper* task = new TaskWrapper(this);
1.59 + task->Init(object_, method, MakeTuple(a));
1.60 + return task;
1.61 + }
1.62 +
1.63 +protected:
1.64 + template <class Method, class Params>
1.65 + class RunnableMethod : public Task {
1.66 + public:
1.67 + RunnableMethod() { }
1.68 +
1.69 + void Init(T* obj, Method meth, const Params& params) {
1.70 + obj_ = obj;
1.71 + meth_ = meth;
1.72 + params_ = params;
1.73 + }
1.74 +
1.75 + virtual void Run() { DispatchToMethod(obj_, meth_, params_); }
1.76 +
1.77 + private:
1.78 + T* obj_;
1.79 + Method meth_;
1.80 + Params params_;
1.81 + };
1.82 +
1.83 +private:
1.84 + T* object_;
1.85 +};
1.86 +
1.87 +} // namespace plugins
1.88 +} // namespace mozilla
1.89 +
1.90 +#endif // mozilla_plugins_ScopedMethodFactory_h
