Support Managed NetworkState format dictionaries for controlled settings.
[chromium-blink-merge.git] / base / power_monitor / power_monitor_device_source_mac.mm
blob61e439630e74339a69661c117b5c72721296bd46
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.
5 // Implementation based on sample code from
6 // http://developer.apple.com/library/mac/#qa/qa1340/_index.html.
8 #include "base/power_monitor/power_monitor_device_source.h"
10 #include "base/power_monitor/power_monitor.h"
11 #include "base/power_monitor/power_monitor_source.h"
13 #include <IOKit/pwr_mgt/IOPMLib.h>
14 #include <IOKit/IOMessage.h>
16 namespace base {
18 void ProcessPowerEventHelper(PowerMonitorSource::PowerEvent event) {
19   PowerMonitorSource::ProcessPowerEvent(event);
22 namespace {
24 io_connect_t g_system_power_io_port = 0;
25 IONotificationPortRef g_notification_port_ref = 0;
26 io_object_t g_notifier_object = 0;
28 void SystemPowerEventCallback(void*,
29                               io_service_t service,
30                               natural_t message_type,
31                               void* message_argument) {
32   switch (message_type) {
33     // If this message is not handled the system may delay sleep for 30 seconds.
34     case kIOMessageCanSystemSleep:
35       IOAllowPowerChange(g_system_power_io_port,
36           reinterpret_cast<intptr_t>(message_argument));
37       break;
38     case kIOMessageSystemWillSleep:
39       ProcessPowerEventHelper(base::PowerMonitorSource::SUSPEND_EVENT);
40       IOAllowPowerChange(g_system_power_io_port,
41           reinterpret_cast<intptr_t>(message_argument));
42       break;
44     case kIOMessageSystemWillPowerOn:
45       ProcessPowerEventHelper(PowerMonitorSource::RESUME_EVENT);
46       break;
47   }
50 }  // namespace
52 // The reason we can't include this code in the constructor is because
53 // PlatformInit() requires an active runloop and the IO port needs to be
54 // allocated at sandbox initialization time, before there's a runloop.
55 // See crbug.com/83783 .
57 // static
58 void PowerMonitorDeviceSource::AllocateSystemIOPorts() {
59   DCHECK_EQ(g_system_power_io_port, 0u);
61   // Notification port allocated by IORegisterForSystemPower.
62   g_system_power_io_port = IORegisterForSystemPower(
63       NULL, &g_notification_port_ref, SystemPowerEventCallback,
64       &g_notifier_object);
66   DCHECK_NE(g_system_power_io_port, 0u);
69 void PowerMonitorDeviceSource::PlatformInit() {
70   // Need to call AllocateSystemIOPorts() before creating a PowerMonitor
71   // object.
72   DCHECK_NE(g_system_power_io_port, 0u);
73   if (g_system_power_io_port == 0)
74     return;
76   // Add the notification port to the application runloop
77   CFRunLoopAddSource(
78       CFRunLoopGetCurrent(),
79       IONotificationPortGetRunLoopSource(g_notification_port_ref),
80       kCFRunLoopCommonModes);
83 void PowerMonitorDeviceSource::PlatformDestroy() {
84   DCHECK_NE(g_system_power_io_port, 0u);
85   if (g_system_power_io_port == 0)
86     return;
88   // Remove the sleep notification port from the application runloop
89   CFRunLoopRemoveSource(
90       CFRunLoopGetCurrent(),
91       IONotificationPortGetRunLoopSource(g_notification_port_ref),
92       kCFRunLoopCommonModes);
94   // Deregister for system sleep notifications
95   IODeregisterForSystemPower(&g_notifier_object);
97   // IORegisterForSystemPower implicitly opens the Root Power Domain IOService,
98   // so we close it here.
99   IOServiceClose(g_system_power_io_port);
101   g_system_power_io_port = 0;
103   // Destroy the notification port allocated by IORegisterForSystemPower.
104   IONotificationPortDestroy(g_notification_port_ref);
107 }  // namespace base