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| 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 // Implementation based on sample code from | |
| 6 // http://developer.apple.com/library/mac/#qa/qa1340/_index.html. | |
| 7 | |
| 8 #include "base/power_monitor/power_monitor.h" | |
| 9 | |
| 10 #include <IOKit/pwr_mgt/IOPMLib.h> | |
| 11 #include <IOKit/IOMessage.h> | |
| 12 | |
| 13 namespace base { | |
| 14 | |
| 15 void ProcessPowerEventHelper(PowerMonitor::PowerEvent event) { | |
| 16 DCHECK(PowerMonitor::Get()); | |
| 17 if (PowerMonitor::Get()) | |
| 18 PowerMonitor::Get()->ProcessPowerEvent(event); | |
| 19 } | |
| 20 | |
| 21 namespace { | |
| 22 | |
| 23 io_connect_t g_system_power_io_port = 0; | |
| 24 IONotificationPortRef g_notification_port_ref = 0; | |
| 25 io_object_t g_notifier_object = 0; | |
| 26 | |
| 27 void SystemPowerEventCallback(void*, | |
| 28 io_service_t service, | |
| 29 natural_t message_type, | |
| 30 void* message_argument) { | |
| 31 switch (message_type) { | |
| 32 case kIOMessageSystemWillSleep: | |
| 33 ProcessPowerEventHelper(base::PowerMonitor::SUSPEND_EVENT); | |
| 34 IOAllowPowerChange(g_system_power_io_port, | |
| 35 reinterpret_cast<intptr_t>(message_argument)); | |
| 36 break; | |
| 37 | |
| 38 case kIOMessageSystemWillPowerOn: | |
| 39 ProcessPowerEventHelper(PowerMonitor::RESUME_EVENT); | |
| 40 break; | |
| 41 } | |
| 42 } | |
| 43 | |
| 44 } // namespace | |
| 45 | |
| 46 // The reason we can't include this code in the constructor is because | |
| 47 // PlatformInit() requires an active runloop and the IO port needs to be | |
| 48 // allocated at sandbox initialization time, before there's a runloop. | |
| 49 // See crbug.com/83783 . | |
| 50 | |
| 51 // static | |
| 52 void PowerMonitor::AllocateSystemIOPorts() { | |
| 53 DCHECK_EQ(g_system_power_io_port, 0u); | |
| 54 | |
| 55 // Notification port allocated by IORegisterForSystemPower. | |
| 56 g_system_power_io_port = IORegisterForSystemPower( | |
| 57 NULL, &g_notification_port_ref, SystemPowerEventCallback, | |
| 58 &g_notifier_object); | |
| 59 | |
| 60 DCHECK_NE(g_system_power_io_port, 0u); | |
| 61 } | |
| 62 | |
| 63 void PowerMonitor::PlatformInit() { | |
| 64 // Need to call AllocateSystemIOPorts() before creating a PowerMonitor | |
| 65 // object. | |
| 66 DCHECK_NE(g_system_power_io_port, 0u); | |
| 67 if (g_system_power_io_port == 0) | |
| 68 return; | |
| 69 | |
| 70 // Add the notification port to the application runloop | |
| 71 CFRunLoopAddSource( | |
| 72 CFRunLoopGetCurrent(), | |
| 73 IONotificationPortGetRunLoopSource(g_notification_port_ref), | |
| 74 kCFRunLoopCommonModes); | |
| 75 } | |
| 76 | |
| 77 void PowerMonitor::PlatformDestroy() { | |
| 78 DCHECK_NE(g_system_power_io_port, 0u); | |
| 79 if (g_system_power_io_port == 0) | |
| 80 return; | |
| 81 | |
| 82 // Remove the sleep notification port from the application runloop | |
| 83 CFRunLoopRemoveSource( | |
| 84 CFRunLoopGetCurrent(), | |
| 85 IONotificationPortGetRunLoopSource(g_notification_port_ref), | |
| 86 kCFRunLoopCommonModes); | |
| 87 | |
| 88 // Deregister for system sleep notifications | |
| 89 IODeregisterForSystemPower(&g_notifier_object); | |
| 90 | |
| 91 // IORegisterForSystemPower implicitly opens the Root Power Domain IOService, | |
| 92 // so we close it here. | |
| 93 IOServiceClose(g_system_power_io_port); | |
| 94 | |
| 95 g_system_power_io_port = 0; | |
| 96 | |
| 97 // Destroy the notification port allocated by IORegisterForSystemPower. | |
| 98 IONotificationPortDestroy(g_notification_port_ref); | |
| 99 } | |
| 100 | |
| 101 } // namespace base | |
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Chromium Code Reviews
Issue 17074009:
Created multi-process-friendly PowerMonitor interface. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src