components/scheduler/child/scheduler_task_runner_delegate_impl.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_SCHEDULER_CHILD_SCHEDULER_TASK_RUNNER_DELEGATE_IMPL_H_
   6 #define COMPONENTS_SCHEDULER_CHILD_SCHEDULER_TASK_RUNNER_DELEGATE_IMPL_H_
   7
   8 #include "base/message_loop/message_loop.h"
   9 #include "components/scheduler/child/scheduler_task_runner_delegate.h"
  10 #include "components/scheduler/scheduler_export.h"
  11
  12 namespace scheduler {
  13
  14 class SCHEDULER_EXPORT SchedulerTaskRunnerDelegateImpl
  15     : public SchedulerTaskRunnerDelegate {
  16  public:
  17   // |message_loop| is not owned and must outlive the lifetime of this object.
  18   static scoped_refptr<SchedulerTaskRunnerDelegateImpl> Create(
  19       base::MessageLoop* message_loop);
  20
  21   // SchedulerTaskRunnerDelegate implementation
  22   void SetDefaultTaskRunner(
  23       scoped_refptr<base::SingleThreadTaskRunner> task_runner) override;
  24   void RestoreDefaultTaskRunner() override;
  25   bool PostDelayedTask(const tracked_objects::Location& from_here,
  26                        const base::Closure& task,
  27                        base::TimeDelta delay) override;
  28   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
  29                                   const base::Closure& task,
  30                                   base::TimeDelta delay) override;
  31   bool RunsTasksOnCurrentThread() const override;
  32   bool IsNested() const override;
  33
  34  protected:
  35   ~SchedulerTaskRunnerDelegateImpl() override;
  36
  37  private:
  38   explicit SchedulerTaskRunnerDelegateImpl(base::MessageLoop* message_loop);
  39
  40   // Not owned.
  41   base::MessageLoop* message_loop_;
  42   scoped_refptr<SingleThreadTaskRunner> message_loop_task_runner_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(SchedulerTaskRunnerDelegateImpl);
  45 };
  46
  47 }  // namespace scheduler
  48
  49 #endif  // COMPONENTS_SCHEDULER_CHILD_SCHEDULER_TASK_RUNNER_DELEGATE_IMPL_H_