components/scheduler/child/null_task_queue.cc

   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 #include "components/scheduler/child/null_task_queue.h"
   6
   7 namespace scheduler {
   8
   9 NullTaskQueue::NullTaskQueue(
  10     scoped_refptr<base::SingleThreadTaskRunner> task_runner)
  11     : task_runner_(task_runner) {}
  12
  13 NullTaskQueue::~NullTaskQueue() {}
  14
  15 bool NullTaskQueue::RunsTasksOnCurrentThread() const {
  16   return task_runner_->RunsTasksOnCurrentThread();
  17 }
  18
  19 bool NullTaskQueue::PostDelayedTask(const tracked_objects::Location& from_here,
  20                                     const base::Closure& task,
  21                                     base::TimeDelta delay) {
  22   return task_runner_->PostDelayedTask(from_here, task, delay);
  23 }
  24
  25 bool NullTaskQueue::PostNonNestableDelayedTask(
  26     const tracked_objects::Location& from_here,
  27     const base::Closure& task,
  28     base::TimeDelta delay) {
  29   return task_runner_->PostNonNestableDelayedTask(from_here, task, delay);
  30 }
  31
  32 bool NullTaskQueue::PostDelayedTaskAt(
  33     const tracked_objects::Location& from_here,
  34     const base::Closure& task,
  35     base::TimeTicks desired_run_time) {
  36   // Note: this loses the guarantee of monotonicity but we can't do any better
  37   // with base::TaskRunner.
  38   return task_runner_->PostDelayedTask(
  39       from_here, task, desired_run_time - base::TimeTicks::Now());
  40 }
  41
  42 bool NullTaskQueue::IsQueueEnabled() const {
  43   return true;
  44 }
  45
  46 TaskQueue::QueueState NullTaskQueue::GetQueueState() const {
  47   return QueueState::EMPTY;
  48 }
  49
  50 const char* NullTaskQueue::GetName() const {
  51   return "null_tq";
  52 }
  53
  54 void NullTaskQueue::SetQueuePriority(QueuePriority priority) {}
  55
  56 void NullTaskQueue::PumpQueue() {}
  57
  58 void NullTaskQueue::SetPumpPolicy(PumpPolicy pump_policy) {}
  59
  60 }  // namespace scheduler