components/scheduler/child/null_task_queue.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_NULL_CHILD_TASK_QUEUE_H_
   6 #define COMPONENTS_SCHEDULER_NULL_CHILD_TASK_QUEUE_H_
   7
   8 #include "components/scheduler/child/task_queue.h"
   9 #include "components/scheduler/scheduler_export.h"
  10
  11 namespace scheduler {
  12
  13 class SCHEDULER_EXPORT NullTaskQueue : public TaskQueue {
  14  public:
  15   NullTaskQueue(scoped_refptr<base::SingleThreadTaskRunner> task_runner);
  16
  17   // TaskQueue implementation
  18   bool RunsTasksOnCurrentThread() const override;
  19   bool PostDelayedTask(const tracked_objects::Location& from_here,
  20                        const base::Closure& task,
  21                        base::TimeDelta delay) override;
  22   bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
  23                                   const base::Closure& task,
  24                                   base::TimeDelta delay) override;
  25   bool PostDelayedTaskAt(const tracked_objects::Location& from_here,
  26                          const base::Closure& task,
  27                          base::TimeTicks desired_run_time) override;
  28
  29   bool IsQueueEnabled() const override;
  30   QueueState GetQueueState() const override;
  31   const char* GetName() const override;
  32   void SetQueuePriority(QueuePriority priority) override;
  33   void PumpQueue() override;
  34   void SetPumpPolicy(PumpPolicy pump_policy) override;
  35
  36  protected:
  37   ~NullTaskQueue() override;
  38
  39   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  40
  41   DISALLOW_COPY_AND_ASSIGN(NullTaskQueue);
  42 };
  43
  44 }  // namespace scheduler
  45
  46 #endif  // COMPONENTS_SCHEDULER_CHILD_NULL_TASK_QUEUE_H_