1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// 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/message_loop.h"
#include "base/time/time.h"
namespace base {
static SystemMonitor* g_system_monitor = NULL;
SystemMonitor::SystemMonitor()
: devices_changed_observer_list_(
new ObserverListThreadSafe<DevicesChangedObserver>()) {
DCHECK(!g_system_monitor);
g_system_monitor = this;
}
SystemMonitor::~SystemMonitor() {
DCHECK_EQ(this, g_system_monitor);
g_system_monitor = NULL;
}
// static
SystemMonitor* SystemMonitor::Get() {
return g_system_monitor;
}
void SystemMonitor::ProcessDevicesChanged(DeviceType device_type) {
NotifyDevicesChanged(device_type);
}
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(
FROM_HERE, &DevicesChangedObserver::OnDevicesChanged, device_type);
}
} // namespace base
|
