Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set sw=2 ts=8 et ft=cpp : */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
       5             :  * You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #ifndef mozilla_MediaTaskUtils_h
       8             : #define mozilla_MediaTaskUtils_h
       9             : 
      10             : #include "nsThreadUtils.h"
      11             : 
      12             : // The main reason this file is separate from MediaUtils.h
      13             : #include "base/task.h"
      14             : 
      15             : namespace mozilla {
      16             : namespace media {
      17             : 
      18             : /* media::NewTaskFrom() - Create a Task from a lambda.
      19             :  *
      20             :  * Similar to media::NewRunnableFrom() - Create an nsRunnable from a lambda.
      21             :  */
      22             : 
      23             : template<typename OnRunType>
      24           0 : class LambdaTask : public Runnable
      25             : {
      26             : public:
      27           0 :   explicit LambdaTask(OnRunType&& aOnRun)
      28             :     : Runnable("media::LambdaTask")
      29           0 :     , mOnRun(Move(aOnRun))
      30             :   {
      31           0 :   }
      32             : 
      33             : private:
      34             :   NS_IMETHOD
      35           0 :   Run() override
      36             :   {
      37           0 :     mOnRun();
      38           0 :     return NS_OK;
      39             :   }
      40             :   OnRunType mOnRun;
      41             : };
      42             : 
      43             : template<typename OnRunType>
      44             : already_AddRefed<LambdaTask<OnRunType>>
      45           0 : NewTaskFrom(OnRunType&& aOnRun)
      46             : {
      47             :   typedef LambdaTask<OnRunType> LambdaType;
      48           0 :   RefPtr<LambdaType> lambda = new LambdaType(Forward<OnRunType>(aOnRun));
      49           0 :   return lambda.forget();
      50             : }
      51             : 
      52             : } // namespace media
      53             : } // namespace mozilla
      54             : 
      55             : #endif // mozilla_MediaTaskUtils_h