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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/timer/hi_res_timer_manager.h" | 5 #include "base/timer/hi_res_timer_manager.h" |
6 | 6 |
7 #include "base/power_monitor/power_monitor.h" | 7 #include "base/power_monitor/power_monitor.h" |
8 #include "base/time/time.h" | 8 #include "base/time/time.h" |
9 | 9 |
10 namespace base { | 10 namespace base { |
11 | 11 |
12 HighResolutionTimerManager::HighResolutionTimerManager() | 12 HighResolutionTimerManager::HighResolutionTimerManager() |
13 : hi_res_clock_available_(false) { | 13 : hi_res_clock_available_(false) { |
14 base::PowerMonitor* power_monitor = base::PowerMonitor::Get(); | 14 base::PowerMonitor::AddObserver(this); |
15 DCHECK(power_monitor != NULL); | 15 UseHiResClock(!base::PowerMonitor::IsOnBatteryPower()); |
16 power_monitor->AddObserver(this); | |
17 UseHiResClock(!power_monitor->IsOnBatteryPower()); | |
18 } | 16 } |
19 | 17 |
20 HighResolutionTimerManager::~HighResolutionTimerManager() { | 18 HighResolutionTimerManager::~HighResolutionTimerManager() { |
21 base::PowerMonitor::Get()->RemoveObserver(this); | 19 base::PowerMonitor::RemoveObserver(this); |
22 UseHiResClock(false); | 20 UseHiResClock(false); |
23 } | 21 } |
24 | 22 |
25 void HighResolutionTimerManager::OnPowerStateChange(bool on_battery_power) { | 23 void HighResolutionTimerManager::OnPowerStateChange(bool on_battery_power) { |
26 UseHiResClock(!on_battery_power); | 24 UseHiResClock(!on_battery_power); |
27 } | 25 } |
28 | 26 |
29 void HighResolutionTimerManager::UseHiResClock(bool use) { | 27 void HighResolutionTimerManager::UseHiResClock(bool use) { |
30 if (use == hi_res_clock_available_) | 28 if (use == hi_res_clock_available_) |
31 return; | 29 return; |
32 hi_res_clock_available_ = use; | 30 hi_res_clock_available_ = use; |
33 base::Time::EnableHighResolutionTimer(use); | 31 base::Time::EnableHighResolutionTimer(use); |
34 } | 32 } |
35 | 33 |
36 } // namespace base | 34 } // namespace base |
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