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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.
// Implementation based on sample code from
// http://developer.apple.com/library/mac/#qa/qa1340/_index.html.
#include "base/system_monitor/system_monitor.h"
#include <IOKit/pwr_mgt/IOPMLib.h>
#include <IOKit/IOMessage.h>
namespace base {
namespace {
io_connect_t g_system_power_io_port = 0;
IONotificationPortRef g_notification_port_ref = 0;
io_object_t g_notifier_object = 0;
void SystemPowerEventCallback(void*,
io_service_t service,
natural_t message_type,
void* message_argument) {
SystemMonitor* sys_monitor = SystemMonitor::Get();
DCHECK(sys_monitor);
switch (message_type) {
case kIOMessageSystemWillSleep:
sys_monitor->ProcessPowerMessage(SystemMonitor::SUSPEND_EVENT);
IOAllowPowerChange(g_system_power_io_port,
reinterpret_cast<intptr_t>(message_argument));
break;
case kIOMessageSystemWillPowerOn:
sys_monitor->ProcessPowerMessage(SystemMonitor::RESUME_EVENT);
break;
}
}
} // namespace
// The reason we can't include this code in the constructor is because
// PlatformInit() requires an active runloop and the IO port needs to be
// allocated at sandbox initialization time, before there's a runloop.
// See crbug.com/83783 .
// static
void SystemMonitor::AllocateSystemIOPorts() {
DCHECK_EQ(g_system_power_io_port, 0u);
// Notification port allocated by IORegisterForSystemPower.
g_system_power_io_port = IORegisterForSystemPower(
NULL, &g_notification_port_ref, SystemPowerEventCallback,
&g_notifier_object);
DCHECK_NE(g_system_power_io_port, 0u);
}
void SystemMonitor::PlatformInit() {
// Need to call AllocateSystemIOPorts() before constructing a SystemMonitor
// object.
DCHECK_NE(g_system_power_io_port, 0u);
if (g_system_power_io_port == 0)
return;
// Add the notification port to the application runloop
CFRunLoopAddSource(
CFRunLoopGetCurrent(),
IONotificationPortGetRunLoopSource(g_notification_port_ref),
kCFRunLoopCommonModes);
}
void SystemMonitor::PlatformDestroy() {
DCHECK_NE(g_system_power_io_port, 0u);
if (g_system_power_io_port == 0)
return;
// Remove the sleep notification port from the application runloop
CFRunLoopRemoveSource(
CFRunLoopGetCurrent(),
IONotificationPortGetRunLoopSource(g_notification_port_ref),
kCFRunLoopCommonModes);
// Deregister for system sleep notifications
IODeregisterForSystemPower(&g_notifier_object);
// IORegisterForSystemPower implicitly opens the Root Power Domain IOService,
// so we close it here.
IOServiceClose(g_system_power_io_port);
g_system_power_io_port = 0;
// Destroy the notification port allocated by IORegisterForSystemPower.
IONotificationPortDestroy(g_notification_port_ref);
}
} // namespace base
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