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| 1 // Copyright 2016 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_AUTO_ADVANCING_VIRTUAL_TIME_DOMAIN_H_ |
| 6 #define COMPONENTS_SCHEDULER_RENDERER_AUTO_ADVANCING_VIRTUAL_TIME_DOMAIN_H_ |
| 7 |
| 8 #include "base/macros.h" |
| 9 #include "components/scheduler/base/virtual_time_domain.h" |
| 10 |
| 11 namespace scheduler { |
| 12 |
| 13 // A time domain that runs tasks sequentially in time order but doesn't sleep |
| 14 // between delayed tasks. |
| 15 // |
| 16 // KEY: A-E are delayed tasks |
| 17 // | A B C D E (Execution with RealTimeDomain) |
| 18 // |-----------------------------> time |
| 19 // |
| 20 // |ABCDE (Execution with AutoAdvancingVirtualTimeDomain) |
| 21 // |-----------------------------> time |
| 22 class SCHEDULER_EXPORT AutoAdvancingVirtualTimeDomain |
| 23 : public VirtualTimeDomain { |
| 24 public: |
| 25 explicit AutoAdvancingVirtualTimeDomain(base::TimeTicks initial_time); |
| 26 ~AutoAdvancingVirtualTimeDomain() override; |
| 27 |
| 28 // TimeDomain implementation: |
| 29 bool MaybeAdvanceTime() override; |
| 30 void RequestWakeup(base::TimeTicks now, base::TimeDelta delay) override; |
| 31 const char* GetName() const override; |
| 32 |
| 33 // Controls whether or not virtual time is allowed to advance, when the |
| 34 // TaskQueueManager runs out of immediate work to do. |
| 35 void SetCanAdvanceVirtualTime(bool can_advance_virtual_time); |
| 36 |
| 37 private: |
| 38 bool can_advance_virtual_time_; |
| 39 |
| 40 DISALLOW_COPY_AND_ASSIGN(AutoAdvancingVirtualTimeDomain); |
| 41 }; |
| 42 |
| 43 } // namespace scheduler |
| 44 |
| 45 #endif // COMPONENTS_SCHEDULER_RENDERER_AUTO_ADVANCING_VIRTUAL_TIME_DOMAIN_H_ |
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