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// Copyright (c) 2012 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/system_monitor/system_monitor.h"
#include <utility>
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/stl_util.h"
#include "base/time.h"
#include "base/utf_string_conversions.h"
namespace base {
static SystemMonitor* g_system_monitor = NULL;
#if defined(ENABLE_BATTERY_MONITORING)
// The amount of time (in ms) to wait before running the initial
// battery check.
static int kDelayedBatteryCheckMs = 10 * 1000;
#endif // defined(ENABLE_BATTERY_MONITORING)
SystemMonitor::RemovableStorageInfo::RemovableStorageInfo() {
}
SystemMonitor::RemovableStorageInfo::RemovableStorageInfo(
const std::string& id,
const string16& device_name,
const FilePath::StringType& device_location)
: device_id(id),
name(device_name),
location(device_location) {
}
SystemMonitor::SystemMonitor()
: power_observer_list_(new ObserverListThreadSafe<PowerObserver>()),
devices_changed_observer_list_(
new ObserverListThreadSafe<DevicesChangedObserver>()),
battery_in_use_(false),
suspended_(false) {
DCHECK(!g_system_monitor);
g_system_monitor = this;
DCHECK(MessageLoop::current());
#if defined(ENABLE_BATTERY_MONITORING)
delayed_battery_check_.Start(FROM_HERE,
base::TimeDelta::FromMilliseconds(kDelayedBatteryCheckMs), this,
&SystemMonitor::BatteryCheck);
#endif // defined(ENABLE_BATTERY_MONITORING)
#if defined(OS_MACOSX)
PlatformInit();
#endif
}
SystemMonitor::~SystemMonitor() {
#if defined(OS_MACOSX)
PlatformDestroy();
#endif
DCHECK_EQ(this, g_system_monitor);
g_system_monitor = NULL;
}
// static
SystemMonitor* SystemMonitor::Get() {
return g_system_monitor;
}
void SystemMonitor::ProcessPowerMessage(PowerEvent event_id) {
// Suppress duplicate notifications. Some platforms may
// send multiple notifications of the same event.
switch (event_id) {
case POWER_STATE_EVENT:
{
bool on_battery = IsBatteryPower();
if (on_battery != battery_in_use_) {
battery_in_use_ = on_battery;
NotifyPowerStateChange();
}
}
break;
case RESUME_EVENT:
if (suspended_) {
suspended_ = false;
NotifyResume();
}
break;
case SUSPEND_EVENT:
if (!suspended_) {
suspended_ = true;
NotifySuspend();
}
break;
}
}
void SystemMonitor::ProcessDevicesChanged(DeviceType device_type) {
NotifyDevicesChanged(device_type);
}
void SystemMonitor::ProcessRemovableStorageAttached(
const std::string& id,
const string16& name,
const FilePath::StringType& location) {
{
base::AutoLock lock(removable_storage_lock_);
if (ContainsKey(removable_storage_map_, id)) {
// This can happen if our unique id scheme fails. Ignore the incoming
// non-unique attachment.
return;
}
RemovableStorageInfo info(id, name, location);
removable_storage_map_.insert(std::make_pair(id, info));
}
NotifyRemovableStorageAttached(id, name, location);
}
void SystemMonitor::ProcessRemovableStorageDetached(const std::string& id) {
{
base::AutoLock lock(removable_storage_lock_);
RemovableStorageMap::iterator it = removable_storage_map_.find(id);
if (it == removable_storage_map_.end())
return;
removable_storage_map_.erase(it);
}
NotifyRemovableStorageDetached(id);
}
std::vector<SystemMonitor::RemovableStorageInfo>
SystemMonitor::GetAttachedRemovableStorage() const {
std::vector<RemovableStorageInfo> results;
base::AutoLock lock(removable_storage_lock_);
for (RemovableStorageMap::const_iterator it = removable_storage_map_.begin();
it != removable_storage_map_.end();
++it) {
results.push_back(it->second);
}
return results;
}
void SystemMonitor::AddPowerObserver(PowerObserver* obs) {
power_observer_list_->AddObserver(obs);
}
void SystemMonitor::RemovePowerObserver(PowerObserver* obs) {
power_observer_list_->RemoveObserver(obs);
}
void SystemMonitor::AddDevicesChangedObserver(DevicesChangedObserver* obs) {
devices_changed_observer_list_->AddObserver(obs);
}
void SystemMonitor::RemoveDevicesChangedObserver(DevicesChangedObserver* obs) {
devices_changed_observer_list_->RemoveObserver(obs);
}
void SystemMonitor::NotifyDevicesChanged(DeviceType device_type) {
DVLOG(1) << "DevicesChanged with device type " << device_type;
devices_changed_observer_list_->Notify(
&DevicesChangedObserver::OnDevicesChanged, device_type);
}
void SystemMonitor::NotifyRemovableStorageAttached(
const std::string& id,
const string16& name,
const FilePath::StringType& location) {
DVLOG(1) << "RemovableStorageAttached with name " << UTF16ToUTF8(name)
<< " and id " << id;
devices_changed_observer_list_->Notify(
&DevicesChangedObserver::OnRemovableStorageAttached, id, name, location);
}
void SystemMonitor::NotifyRemovableStorageDetached(const std::string& id) {
DVLOG(1) << "RemovableStorageDetached for id " << id;
devices_changed_observer_list_->Notify(
&DevicesChangedObserver::OnRemovableStorageDetached, id);
}
void SystemMonitor::NotifyPowerStateChange() {
DVLOG(1) << "PowerStateChange: " << (BatteryPower() ? "On" : "Off")
<< " battery";
power_observer_list_->Notify(&PowerObserver::OnPowerStateChange,
BatteryPower());
}
void SystemMonitor::NotifySuspend() {
DVLOG(1) << "Power Suspending";
power_observer_list_->Notify(&PowerObserver::OnSuspend);
}
void SystemMonitor::NotifyResume() {
DVLOG(1) << "Power Resuming";
power_observer_list_->Notify(&PowerObserver::OnResume);
}
void SystemMonitor::BatteryCheck() {
ProcessPowerMessage(SystemMonitor::POWER_STATE_EVENT);
}
} // namespace base
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