components/scheduler/child/null_worker_scheduler.cc

   1 // Copyright 2014 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_worker_scheduler.h"
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "base/thread_task_runner_handle.h"
  10 #include "components/scheduler/child/null_idle_task_runner.h"
  11 #include "components/scheduler/child/null_task_queue.h"
  12
  13 namespace scheduler {
  14
  15 NullWorkerScheduler::NullWorkerScheduler()
  16     : task_runner_(new NullTaskQueue(base::ThreadTaskRunnerHandle::Get())),
  17       idle_task_runner_(new NullIdleTaskRunner()) {}
  18
  19 NullWorkerScheduler::~NullWorkerScheduler() {
  20 }
  21
  22 scoped_refptr<TaskQueue> NullWorkerScheduler::DefaultTaskRunner() {
  23   return task_runner_;
  24 }
  25
  26 scoped_refptr<SingleThreadIdleTaskRunner>
  27 NullWorkerScheduler::IdleTaskRunner() {
  28   return idle_task_runner_;
  29 }
  30
  31 void NullWorkerScheduler::AddTaskObserver(
  32     base::MessageLoop::TaskObserver* task_observer) {
  33   base::MessageLoop::current()->AddTaskObserver(task_observer);
  34 }
  35
  36 void NullWorkerScheduler::RemoveTaskObserver(
  37     base::MessageLoop::TaskObserver* task_observer) {
  38   base::MessageLoop::current()->RemoveTaskObserver(task_observer);
  39 }
  40
  41 bool NullWorkerScheduler::CanExceedIdleDeadlineIfRequired() const {
  42   return false;
  43 }
  44
  45 bool NullWorkerScheduler::ShouldYieldForHighPriorityWork() {
  46   return false;
  47 }
  48
  49 void NullWorkerScheduler::Init() {
  50 }
  51
  52 void NullWorkerScheduler::Shutdown() {
  53 }
  54
  55 }  // namespace scheduler