components/scheduler/child/web_scheduler_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 CONTENT_CHILD_SCHEDULER_BASE_WEB_SCHEDULER_IMPL_H_
   6 #define CONTENT_CHILD_SCHEDULER_BASE_WEB_SCHEDULER_IMPL_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/time/time.h"
  11 #include "components/scheduler/scheduler_export.h"
  12 #include "third_party/WebKit/public/platform/WebScheduler.h"
  13 #include "third_party/WebKit/public/platform/WebThread.h"
  14
  15 namespace base {
  16 class SingleThreadTaskRunner;
  17 }
  18
  19 namespace scheduler {
  20
  21 class ChildScheduler;
  22 class SingleThreadIdleTaskRunner;
  23 class TaskQueue;
  24 class WebTaskRunnerImpl;
  25
  26 class SCHEDULER_EXPORT WebSchedulerImpl : public blink::WebScheduler {
  27  public:
  28   WebSchedulerImpl(
  29       ChildScheduler* child_scheduler,
  30       scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner,
  31       scoped_refptr<base::SingleThreadTaskRunner> loading_task_runner,
  32       scoped_refptr<TaskQueue> timer_task_runner);
  33   ~WebSchedulerImpl() override;
  34
  35   // blink::WebScheduler implementation:
  36   virtual void shutdown();
  37   virtual bool shouldYieldForHighPriorityWork();
  38   virtual bool canExceedIdleDeadlineIfRequired();
  39   virtual void postIdleTask(const blink::WebTraceLocation& location,
  40                             blink::WebThread::IdleTask* task);
  41   virtual void postNonNestableIdleTask(const blink::WebTraceLocation& location,
  42                                        blink::WebThread::IdleTask* task);
  43   virtual void postIdleTaskAfterWakeup(const blink::WebTraceLocation& location,
  44                                        blink::WebThread::IdleTask* task);
  45   virtual blink::WebTaskRunner* loadingTaskRunner();
  46   virtual blink::WebTaskRunner* timerTaskRunner();
  47
  48   // TODO(alexclarke): Remove when possible.
  49   virtual void postTimerTaskAt(const blink::WebTraceLocation& location,
  50                                blink::WebTaskRunner::Task* task,
  51                                double monotonicTime);
  52
  53  private:
  54   static void runIdleTask(scoped_ptr<blink::WebThread::IdleTask> task,
  55                           base::TimeTicks deadline);
  56
  57   ChildScheduler* child_scheduler_;  // NOT OWNED
  58   scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner_;
  59   scoped_refptr<TaskQueue> timer_task_runner_;
  60   scoped_ptr<WebTaskRunnerImpl> loading_web_task_runner_;
  61   scoped_ptr<WebTaskRunnerImpl> timer_web_task_runner_;
  62 };
  63
  64 }  // namespace scheduler
  65
  66 #endif  // CONTENT_CHILD_SCHEDULER_BASE_WEB_SCHEDULER_IMPL_H_