components/scheduler/child/virtual_time_tqm_delegate.cc - Issue 1652083002: Prepare for per-webview virtual time

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Issue 1652083002: Prepare for per-webview virtual time (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: rename useVirtualTime Created 4 years, 10 months ago

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« components/scheduler/base/task_queue_manager.cc ('K') | « components/scheduler/child/virtual_time_tqm_delegate.h ('k') | components/scheduler/child/virtual_time_tqm_delegate_unittest.cc » ('j') | components/scheduler/renderer/web_frame_scheduler_impl.cc » ('J')
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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 double VirtualTimeTqmDelegate::CurrentTimeSeconds() const {

69 return (now_ - base::TimeTicks::UnixEpoch()).InSecondsF();

70 }

71

72 void VirtualTimeTqmDelegate::AdvancedTimeTo(base::TimeTicks now) {

73 now_ = now;

74 DCHECK_GE(now, now_);

75 while (!delayed_wakeup_multimap_.empty()) {

76 DelayedWakeupMultimap::iterator next_wakeup =

77 delayed_wakeup_multimap_.begin();

78 if (next_wakeup->first > now)

79 break;

80 message_loop_task_runner_->PostDelayedTask(FROM_HERE, next_wakeup->second,

81 base::TimeDelta());

82 delayed_wakeup_multimap_.erase(next_wakeup);

83 }

84 }

85

86 void VirtualTimeTqmDelegate::OnNoMoreImmediateWork() {

87 if (delayed_wakeup_multimap_.empty())

88 return;

89

90 AdvancedTimeTo(delayed_wakeup_multimap_.begin()->first);

91 }

92

93 } // namespace scheduler

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