mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 22:36:09 +03:00
71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
|
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#include "base/timer/hi_res_timer_manager.h"
|
||
|
|
|
||
|
|
#include <algorithm>
|
||
|
|
|
||
|
|
#include "base/atomicops.h"
|
||
|
|
#include "base/metrics/histogram_macros.h"
|
||
|
|
#include "base/power_monitor/power_monitor.h"
|
||
|
|
#include "base/task/post_task.h"
|
||
|
|
#include "base/time/time.h"
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
|
||
|
|
constexpr TimeDelta kUsageSampleInterval = TimeDelta::FromMinutes(10);
|
||
|
|
|
||
|
|
void ReportHighResolutionTimerUsage() {
|
||
|
|
UMA_HISTOGRAM_PERCENTAGE("Windows.HighResolutionTimerUsage",
|
||
|
|
Time::GetHighResolutionTimerUsage());
|
||
|
|
// Reset usage for the next interval.
|
||
|
|
Time::ResetHighResolutionTimerUsage();
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace
|
||
|
|
|
||
|
|
HighResolutionTimerManager::HighResolutionTimerManager()
|
||
|
|
: hi_res_clock_available_(false) {
|
||
|
|
PowerMonitor* power_monitor = PowerMonitor::Get();
|
||
|
|
DCHECK(power_monitor != NULL);
|
||
|
|
power_monitor->AddObserver(this);
|
||
|
|
UseHiResClock(!power_monitor->IsOnBatteryPower());
|
||
|
|
|
||
|
|
// Start polling the high resolution timer usage.
|
||
|
|
Time::ResetHighResolutionTimerUsage();
|
||
|
|
timer_.Start(FROM_HERE, kUsageSampleInterval,
|
||
|
|
Bind(&ReportHighResolutionTimerUsage));
|
||
|
|
}
|
||
|
|
|
||
|
|
HighResolutionTimerManager::~HighResolutionTimerManager() {
|
||
|
|
PowerMonitor::Get()->RemoveObserver(this);
|
||
|
|
UseHiResClock(false);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HighResolutionTimerManager::OnPowerStateChange(bool on_battery_power) {
|
||
|
|
UseHiResClock(!on_battery_power);
|
||
|
|
}
|
||
|
|
|
||
|
|
void HighResolutionTimerManager::OnSuspend() {
|
||
|
|
// Stop polling the usage to avoid including the standby time.
|
||
|
|
timer_.Stop();
|
||
|
|
}
|
||
|
|
|
||
|
|
void HighResolutionTimerManager::OnResume() {
|
||
|
|
// Resume polling the usage.
|
||
|
|
Time::ResetHighResolutionTimerUsage();
|
||
|
|
timer_.Reset();
|
||
|
|
}
|
||
|
|
|
||
|
|
void HighResolutionTimerManager::UseHiResClock(bool use) {
|
||
|
|
if (use == hi_res_clock_available_)
|
||
|
|
return;
|
||
|
|
hi_res_clock_available_ = use;
|
||
|
|
Time::EnableHighResolutionTimer(use);
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace base
|