content/child/scheduler/scheduler_message_loop_delegate.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 CONTENT_CHILD_SCHEDULER_SCHEDULER_MESSAGE_LOOP_DELEGATE_H_
   6 #define CONTENT_CHILD_SCHEDULER_SCHEDULER_MESSAGE_LOOP_DELEGATE_H_
   7
   8 #include "base/message_loop/message_loop.h"
   9 #include "content/child/scheduler/nestable_single_thread_task_runner.h"
  10 #include "content/common/content_export.h"
  11
  12 namespace content {
  13
  14 class CONTENT_EXPORT SchedulerMessageLoopDelegate
  15     : public NestableSingleThreadTaskRunner {
  16  public:
  17   // |message_loop| is not owned and must outlive the lifetime of this object.
  18   static scoped_refptr<SchedulerMessageLoopDelegate> Create(
  19       base::MessageLoop* message_loop);
  20
  21   // NestableSingleThreadTaskRunner implementation
  22   bool PostDelayedTask(const tracked_objects::Location& from_here,
  23                        const base::Closure& task,
  24                        base::TimeDelta delay) override;
  25   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
  26                                   const base::Closure& task,
  27                                   base::TimeDelta delay) override;
  28   bool RunsTasksOnCurrentThread() const override;
  29   bool IsNested() const override;
  30
  31  protected:
  32   ~SchedulerMessageLoopDelegate() override;
  33
  34  private:
  35   SchedulerMessageLoopDelegate(base::MessageLoop* message_loop);
  36
  37   // Not owned.
  38   base::MessageLoop* message_loop_;
  39
  40   DISALLOW_COPY_AND_ASSIGN(SchedulerMessageLoopDelegate);
  41 };
  42
  43 }  // namespace content
  44
  45 #endif  // CONTENT_CHILD_SCHEDULER_SCHEDULER_MESSAGE_LOOP_DELEGATE_H_