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/** @file
*
* VirtualBox interface to host's power notification service
*/
/*
* Copyright (C) 2010 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#include "HostPower.h"
#include "Logging.h"
#include <IOKit/IOMessage.h>
#include <IOKit/ps/IOPowerSources.h>
#include <IOKit/ps/IOPSKeys.h>
#define POWER_SOURCE_OUTLET 1
#define POWER_SOURCE_BATTERY 2
HostPowerServiceDarwin::HostPowerServiceDarwin (VirtualBox *aVirtualBox)
: HostPowerService (aVirtualBox)
, mThread (NULL)
, mRootPort (MACH_PORT_NULL)
, mNotifyPort (nil)
, mRunLoop (nil)
, mCritical (false)
{
/* Create the new worker thread. */
int rc = RTThreadCreate (&mThread, HostPowerServiceDarwin::powerChangeNotificationThread, this, 65536,
RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "MainPower");
if (RT_FAILURE(rc))
LogFlow (("RTThreadCreate failed with %Rrc\n", rc));
}
HostPowerServiceDarwin::~HostPowerServiceDarwin()
{
/* Jump out of the run loop. */
CFRunLoopStop (mRunLoop);
/* Remove the sleep notification port from the application runloop. */
CFRunLoopRemoveSource (CFRunLoopGetCurrent(),
IONotificationPortGetRunLoopSource (mNotifyPort),
kCFRunLoopCommonModes);
/* Deregister for system sleep notifications. */
IODeregisterForSystemPower (&mNotifierObject);
/* IORegisterForSystemPower implicitly opens the Root Power Domain
* IOService so we close it here. */
IOServiceClose (mRootPort);
/* Destroy the notification port allocated by IORegisterForSystemPower */
IONotificationPortDestroy (mNotifyPort);
}
DECLCALLBACK(int) HostPowerServiceDarwin::powerChangeNotificationThread (RTTHREAD /* ThreadSelf */, void *pInstance)
{
HostPowerServiceDarwin *pPowerObj = static_cast<HostPowerServiceDarwin *> (pInstance);
/* We have to initial set the critical state of the battery, cause we want
* not the HostPowerService to inform about that state when a VM starts.
* See lowPowerHandler for more info. */
pPowerObj->checkBatteryCriticalLevel();
/* Register to receive system sleep notifications */
pPowerObj->mRootPort = IORegisterForSystemPower (pPowerObj, &pPowerObj->mNotifyPort,
HostPowerServiceDarwin::powerChangeNotificationHandler,
&pPowerObj->mNotifierObject);
if (pPowerObj->mRootPort == MACH_PORT_NULL)
{
LogFlow (("IORegisterForSystemPower failed\n"));
return VERR_NOT_SUPPORTED;
}
pPowerObj->mRunLoop = CFRunLoopGetCurrent();
/* Add the notification port to the application runloop */
CFRunLoopAddSource (pPowerObj->mRunLoop,
IONotificationPortGetRunLoopSource (pPowerObj->mNotifyPort),
kCFRunLoopCommonModes);
/* Register for all battery change events. The handler will check for low
* power events itself. */
CFRunLoopSourceRef runLoopSource = IOPSNotificationCreateRunLoopSource(HostPowerServiceDarwin::lowPowerHandler,
pPowerObj);
CFRunLoopAddSource(pPowerObj->mRunLoop,
runLoopSource,
kCFRunLoopCommonModes);
/* Start the run loop. This blocks. */
CFRunLoopRun();
return VINF_SUCCESS;
}
void HostPowerServiceDarwin::powerChangeNotificationHandler (void *pvData, io_service_t /* service */, natural_t messageType, void *pMessageArgument)
{
HostPowerServiceDarwin *pPowerObj = static_cast<HostPowerServiceDarwin *> (pvData);
Log (( "powerChangeNotificationHandler: messageType %08lx, arg %08lx\n", (long unsigned int)messageType, (long unsigned int)pMessageArgument));
switch (messageType)
{
case kIOMessageCanSystemSleep:
{
/* Idle sleep is about to kick in. This message will not be
* sent for forced sleep. Applications have a chance to prevent
* sleep by calling IOCancelPowerChange. Most applications
* should not prevent idle sleep. Power Management waits up to
* 30 seconds for you to either allow or deny idle sleep. If
* you don't acknowledge this power change by calling either
* IOAllowPowerChange or IOCancelPowerChange, the system will
* wait 30 seconds then go to sleep. */
IOAllowPowerChange (pPowerObj->mRootPort, reinterpret_cast<long> (pMessageArgument));
break;
}
case kIOMessageSystemWillSleep:
{
/* The system will go for sleep. */
pPowerObj->notify (HostPowerEvent_Suspend);
/* If you do not call IOAllowPowerChange or IOCancelPowerChange to
* acknowledge this message, sleep will be delayed by 30 seconds.
* NOTE: If you call IOCancelPowerChange to deny sleep it returns
* kIOReturnSuccess, however the system WILL still go to sleep. */
IOAllowPowerChange (pPowerObj->mRootPort, reinterpret_cast<long> (pMessageArgument));
break;
}
case kIOMessageSystemWillPowerOn:
{
/* System has started the wake up process. */
break;
}
case kIOMessageSystemHasPoweredOn:
{
/* System has finished the wake up process. */
pPowerObj->notify (HostPowerEvent_Resume);
break;
}
default:
break;
}
}
void HostPowerServiceDarwin::lowPowerHandler (void *pvData)
{
HostPowerServiceDarwin *pPowerObj = static_cast<HostPowerServiceDarwin *> (pvData);
/* Following role for sending the BatteryLow event (5% is critical):
* - Not at VM start even if the battery is in an critical state already.
* - When the power cord is removed so the power supply change from AC to
* battery & the battery is in an critical state nothing is triggered.
* This has to be discussed.
* - When the power supply is the battery & the state of the battery level
* changed from normal to critical. The state transition from critical to
* normal triggers nothing. */
bool fCriticalStateChanged = false;
pPowerObj->checkBatteryCriticalLevel (&fCriticalStateChanged);
if (fCriticalStateChanged)
pPowerObj->notify (HostPowerEvent_BatteryLow);
}
void HostPowerServiceDarwin::checkBatteryCriticalLevel (bool *pfCriticalChanged)
{
CFTypeRef pBlob = IOPSCopyPowerSourcesInfo();
CFArrayRef pSources = IOPSCopyPowerSourcesList (pBlob);
CFDictionaryRef pSource = NULL;
const void *psValue;
bool result;
int powerSource = POWER_SOURCE_OUTLET;
bool critical = false;
if (CFArrayGetCount (pSources) > 0)
{
for (int i = 0; i < CFArrayGetCount (pSources); ++i)
{
pSource = IOPSGetPowerSourceDescription (pBlob, CFArrayGetValueAtIndex (pSources, i));
/* If the source is empty skip over to the next one. */
if (!pSource)
continue;
/* Skip all power sources which are currently not present like a
* second battery. */
if (CFDictionaryGetValue (pSource, CFSTR (kIOPSIsPresentKey)) == kCFBooleanFalse)
continue;
/* Only internal power types are of interest. */
result = CFDictionaryGetValueIfPresent (pSource, CFSTR (kIOPSTransportTypeKey), &psValue);
if (result &&
CFStringCompare ((CFStringRef)psValue, CFSTR (kIOPSInternalType), 0) == kCFCompareEqualTo)
{
/* First check which power source we are connect on. */
result = CFDictionaryGetValueIfPresent (pSource, CFSTR (kIOPSPowerSourceStateKey), &psValue);
if (result &&
CFStringCompare ((CFStringRef)psValue, CFSTR (kIOPSACPowerValue), 0) == kCFCompareEqualTo)
powerSource = POWER_SOURCE_OUTLET;
else if (result &&
CFStringCompare ((CFStringRef)psValue, CFSTR (kIOPSBatteryPowerValue), 0) == kCFCompareEqualTo)
powerSource = POWER_SOURCE_BATTERY;
int curCapacity = 0;
int maxCapacity = 1;
float remCapacity = 0.0f;
/* Fetch the current capacity value of the power source */
result = CFDictionaryGetValueIfPresent (pSource, CFSTR (kIOPSCurrentCapacityKey), &psValue);
if (result)
CFNumberGetValue ((CFNumberRef)psValue, kCFNumberSInt32Type, &curCapacity);
/* Fetch the maximum capacity value of the power source */
result = CFDictionaryGetValueIfPresent (pSource, CFSTR (kIOPSMaxCapacityKey), &psValue);
if (result)
CFNumberGetValue ((CFNumberRef)psValue, kCFNumberSInt32Type, &maxCapacity);
/* Calculate the remaining capacity in percent */
remCapacity = ((float)curCapacity/(float)maxCapacity * 100.0);
/* Check for critical. 5 percent is default. */
int criticalValue = 5;
result = CFDictionaryGetValueIfPresent (pSource, CFSTR (kIOPSDeadWarnLevelKey), &psValue);
if (result)
CFNumberGetValue ((CFNumberRef)psValue, kCFNumberSInt32Type, &criticalValue);
critical = (remCapacity < criticalValue);
/* We have to take action only if we are on battery, the
* previous state wasn't critical, the state has changed & the
* user requested that info. */
if (powerSource == POWER_SOURCE_BATTERY &&
mCritical == false &&
mCritical != critical &&
pfCriticalChanged)
*pfCriticalChanged = true;
Log (("checkBatteryCriticalLevel: Remains: %d.%d%% Critical: %d Critical State Changed: %d\n", (int)remCapacity, (int)(remCapacity * 10) % 10, critical, pfCriticalChanged?*pfCriticalChanged:-1));
}
}
}
/* Save the new state */
mCritical = critical;
CFRelease (pBlob);
CFRelease (pSources);
}
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