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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 #include "components/scheduler/child/virtual_time_tqm_delegate.h" |
| 6 |
| 7 namespace scheduler { |
| 8 |
| 9 // static |
| 10 scoped_refptr<VirtualTimeTqmDelegate> VirtualTimeTqmDelegate::Create( |
| 11 base::MessageLoop* message_loop, |
| 12 base::TimeTicks initial_now) { |
| 13 return make_scoped_refptr( |
| 14 new VirtualTimeTqmDelegate(message_loop, initial_now)); |
| 15 } |
| 16 |
| 17 VirtualTimeTqmDelegate::VirtualTimeTqmDelegate(base::MessageLoop* message_loop, |
| 18 base::TimeTicks initial_now) |
| 19 : message_loop_(message_loop), |
| 20 message_loop_task_runner_(message_loop->task_runner()), |
| 21 now_(initial_now) {} |
| 22 |
| 23 VirtualTimeTqmDelegate::~VirtualTimeTqmDelegate() { |
| 24 RestoreDefaultTaskRunner(); |
| 25 } |
| 26 |
| 27 void VirtualTimeTqmDelegate::SetDefaultTaskRunner( |
| 28 scoped_refptr<base::SingleThreadTaskRunner> task_runner) { |
| 29 message_loop_->SetTaskRunner(task_runner); |
| 30 } |
| 31 |
| 32 void VirtualTimeTqmDelegate::RestoreDefaultTaskRunner() { |
| 33 if (base::MessageLoop::current() == message_loop_) |
| 34 message_loop_->SetTaskRunner(message_loop_task_runner_); |
| 35 } |
| 36 |
| 37 bool VirtualTimeTqmDelegate::PostDelayedTask( |
| 38 const tracked_objects::Location& from_here, |
| 39 const base::Closure& task, |
| 40 base::TimeDelta delay) { |
| 41 if (delay > base::TimeDelta()) { |
| 42 base::TimeTicks fire_time = now_ + delay; |
| 43 delayed_wakeup_multimap_.insert(std::make_pair(fire_time, task)); |
| 44 } |
| 45 return message_loop_task_runner_->PostDelayedTask(from_here, task, delay); |
| 46 } |
| 47 |
| 48 bool VirtualTimeTqmDelegate::PostNonNestableDelayedTask( |
| 49 const tracked_objects::Location& from_here, |
| 50 const base::Closure& task, |
| 51 base::TimeDelta delay) { |
| 52 return message_loop_task_runner_->PostNonNestableDelayedTask(from_here, task, |
| 53 delay); |
| 54 } |
| 55 |
| 56 bool VirtualTimeTqmDelegate::RunsTasksOnCurrentThread() const { |
| 57 return message_loop_task_runner_->RunsTasksOnCurrentThread(); |
| 58 } |
| 59 |
| 60 bool VirtualTimeTqmDelegate::IsNested() const { |
| 61 return message_loop_->IsNested(); |
| 62 } |
| 63 |
| 64 base::TimeTicks VirtualTimeTqmDelegate::NowTicks() { |
| 65 return now_; |
| 66 } |
| 67 |
| 68 void VirtualTimeTqmDelegate::AdvancedTimeTo(base::TimeTicks now) { |
| 69 now_ = now; |
| 70 DCHECK_GT(now, now_); |
| 71 while (!delayed_wakeup_multimap_.empty()) { |
| 72 DelayedWakeupMultimap::iterator next_wakeup = |
| 73 delayed_wakeup_multimap_.begin(); |
| 74 if (next_wakeup->first > now) |
| 75 break; |
| 76 message_loop_task_runner_->PostDelayedTask(FROM_HERE, next_wakeup->second, |
| 77 base::TimeDelta()); |
| 78 delayed_wakeup_multimap_.erase(next_wakeup); |
| 79 } |
| 80 } |
| 81 |
| 82 void VirtualTimeTqmDelegate::OnNoMoreImmediateWork() { |
| 83 if (delayed_wakeup_multimap_.empty()) |
| 84 return; |
| 85 |
| 86 AdvancedTimeTo(delayed_wakeup_multimap_.begin()->first); |
| 87 } |
| 88 |
| 89 } // namespace scheduler |
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