base/power_monitor/power_monitor_device_source.cc

   1 // Copyright 2013 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 "base/power_monitor/power_monitor_device_source.h"
   6
   7 #include "base/time/time.h"
   8
   9 namespace base {
  10
  11 #if defined(ENABLE_BATTERY_MONITORING)
  12 // The amount of time (in ms) to wait before running the initial
  13 // battery check.
  14 static int kDelayedBatteryCheckMs = 10 * 1000;
  15 #endif  // defined(ENABLE_BATTERY_MONITORING)
  16
  17 PowerMonitorDeviceSource::PowerMonitorDeviceSource() {
  18   DCHECK(MessageLoop::current());
  19 #if defined(ENABLE_BATTERY_MONITORING)
  20   delayed_battery_check_.Start(FROM_HERE,
  21       base::TimeDelta::FromMilliseconds(kDelayedBatteryCheckMs), this,
  22       &PowerMonitorDeviceSource::BatteryCheck);
  23 #endif  // defined(ENABLE_BATTERY_MONITORING)
  24 #if defined(OS_MACOSX)
  25   PlatformInit();
  26 #endif
  27 }
  28
  29 PowerMonitorDeviceSource::~PowerMonitorDeviceSource() {
  30 #if defined(OS_MACOSX)
  31   PlatformDestroy();
  32 #endif
  33 }
  34
  35 void PowerMonitorDeviceSource::BatteryCheck() {
  36   ProcessPowerEvent(PowerMonitorSource::POWER_STATE_EVENT);
  37 }
  38
  39 }  // namespace base