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| 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_RENDERER_THROTTLING_HELPER_H_ |
| 6 #define COMPONENTS_SCHEDULER_RENDERER_THROTTLING_HELPER_H_ |
| 7 |
| 8 #include <set> |
| 9 |
| 10 #include "base/macros.h" |
| 11 #include "components/scheduler/base/time_domain.h" |
| 12 #include "components/scheduler/scheduler_export.h" |
| 13 #include "third_party/WebKit/public/platform/WebViewScheduler.h" |
| 14 |
| 15 namespace scheduler { |
| 16 |
| 17 class RendererSchedulerImpl; |
| 18 class VirtualTimeDomain; |
| 19 class WebFrameSchedulerImpl; |
| 20 |
| 21 class SCHEDULER_EXPORT ThrottlingHelper : public TimeDomain::Observer { |
| 22 public: |
| 23 ThrottlingHelper(RendererSchedulerImpl* renderer_scheduler, |
| 24 const char* tracing_category); |
| 25 |
| 26 ~ThrottlingHelper() override; |
| 27 |
| 28 // TimeDomain::Observer implementation: |
| 29 void OnTimeDomainHasImmediateWork() override; |
| 30 void OnTimeDomainHasDelayedWork() override; |
| 31 |
| 32 void Throttle(TaskQueue* task_queue); |
| 33 void Unthrottle(TaskQueue* task_queue); |
| 34 |
| 35 const VirtualTimeDomain* time_domain() const { return time_domain_.get(); } |
| 36 |
| 37 static base::TimeDelta DelayToNextRunTimeInSeconds(base::TimeTicks now); |
| 38 |
| 39 private: |
| 40 void PumpThrottledTasks(); |
| 41 void MaybeSchedulePumpThrottledTasksLocked(); |
| 42 |
| 43 std::set<TaskQueue*> throttled_queues_; |
| 44 base::Closure pump_throttled_tasks_closure_; |
| 45 base::Closure forward_immediate_work_closure_; |
| 46 scoped_refptr<base::SingleThreadTaskRunner> task_runner_; |
| 47 RendererSchedulerImpl* renderer_scheduler_; // NOT OWNED |
| 48 base::TickClock* tick_clock_; // NOT OWNED |
| 49 const char* tracing_category_; // NOT OWNED |
| 50 scoped_ptr<VirtualTimeDomain> time_domain_; |
| 51 |
| 52 bool pending_pump_throttled_tasks_; |
| 53 |
| 54 base::WeakPtrFactory<ThrottlingHelper> weak_factory_; |
| 55 |
| 56 DISALLOW_COPY_AND_ASSIGN(ThrottlingHelper); |
| 57 }; |
| 58 |
| 59 } // namespace scheduler |
| 60 |
| 61 #endif // COMPONENTS_SCHEDULER_RENDERER_THROTTLING_HELPER_H_ |
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