This is xnu-8019. See this file in:
/*
 * Copyright (c) 1998-2005 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

#include <IOKit/pwr_mgt/IOPMPowerSource.h>
#include <IOKit/pwr_mgt/IOPM.h>
#include <IOKit/IOMessage.h>
#include <IOKit/IOLib.h>
#include <os/log.h>

#define super IOService

OSDefineMetaClassAndStructors(IOPMPowerSource, IOService)

// *****************************************************************************
// powerSource
//
// Static initializer for IOPMPowerSource. Returns a new instance of the class
// which the caller must attach to the power plane.
// *****************************************************************************

IOPMPowerSource *IOPMPowerSource::powerSource(void)
{
	IOPMPowerSource *ps = new IOPMPowerSource;

	if (ps) {
		ps->init();
		return ps;
	}
	return NULL;
}

// *****************************************************************************
// init
//
// *****************************************************************************
bool
IOPMPowerSource::init(void)
{
	if (!super::init()) {
		return false;
	}

	nextInList = NULL;

	properties = OSDictionary::withCapacity(10);
	if (!properties) {
		return false;
	}
	properties->setCapacityIncrement(1);

	externalConnectedKey = OSSymbol::withCString(kIOPMPSExternalConnectedKey);
	externalChargeCapableKey = OSSymbol::withCString(kIOPMPSExternalChargeCapableKey);
	batteryInstalledKey = OSSymbol::withCString(kIOPMPSBatteryInstalledKey);
	chargingKey = OSSymbol::withCString(kIOPMPSIsChargingKey);
	warnLevelKey = OSSymbol::withCString(kIOPMPSAtWarnLevelKey);
	criticalLevelKey = OSSymbol::withCString(kIOPMPSAtCriticalLevelKey);
	currentCapacityKey = OSSymbol::withCString(kIOPMPSCurrentCapacityKey);
	maxCapacityKey = OSSymbol::withCString(kIOPMPSMaxCapacityKey);
	timeRemainingKey = OSSymbol::withCString(kIOPMPSTimeRemainingKey);
	amperageKey = OSSymbol::withCString(kIOPMPSAmperageKey);
	voltageKey = OSSymbol::withCString(kIOPMPSVoltageKey);
	cycleCountKey = OSSymbol::withCString(kIOPMPSCycleCountKey);
	adapterInfoKey = OSSymbol::withCString(kIOPMPSAdapterInfoKey);
	locationKey = OSSymbol::withCString(kIOPMPSLocationKey);
	errorConditionKey = OSSymbol::withCString(kIOPMPSErrorConditionKey);
	manufacturerKey = OSSymbol::withCString(kIOPMPSManufacturerKey);
	modelKey = OSSymbol::withCString(kIOPMPSModelKey);
	serialKey = OSSymbol::withCString(kIOPMPSSerialKey);
	batteryInfoKey = OSSymbol::withCString(kIOPMPSLegacyBatteryInfoKey);

	return true;
}

// *****************************************************************************
// free
//
// *****************************************************************************
void
IOPMPowerSource::free(void)
{
	if (properties) {
		properties->release();
	}
	if (externalConnectedKey) {
		externalConnectedKey->release();
	}
	if (externalChargeCapableKey) {
		externalChargeCapableKey->release();
	}
	if (batteryInstalledKey) {
		batteryInstalledKey->release();
	}
	if (chargingKey) {
		chargingKey->release();
	}
	if (warnLevelKey) {
		warnLevelKey->release();
	}
	if (criticalLevelKey) {
		criticalLevelKey->release();
	}
	if (currentCapacityKey) {
		currentCapacityKey->release();
	}
	if (maxCapacityKey) {
		maxCapacityKey->release();
	}
	if (timeRemainingKey) {
		timeRemainingKey->release();
	}
	if (amperageKey) {
		amperageKey->release();
	}
	if (voltageKey) {
		voltageKey->release();
	}
	if (cycleCountKey) {
		cycleCountKey->release();
	}
	if (adapterInfoKey) {
		adapterInfoKey->release();
	}
	if (errorConditionKey) {
		errorConditionKey->release();
	}
	if (manufacturerKey) {
		manufacturerKey->release();
	}
	if (modelKey) {
		modelKey->release();
	}
	if (serialKey) {
		serialKey->release();
	}
	if (locationKey) {
		locationKey->release();
	}
	if (batteryInfoKey) {
		batteryInfoKey->release();
	}

	super::free();
}

// *****************************************************************************
// updateStatus
//
// Update power source state in IORegistry and message interested clients
// notifying them of our change.
// *****************************************************************************
void
IOPMPowerSource::updateStatus(void)
{
	OSCollectionIterator            *iterator;
	OSObject                        *iteratorKey;
	OSObject                        *obj;

	// do nothing if settings haven't changed
	if (!settingsChangedSinceUpdate) {
		return;
	}

	iterator = OSCollectionIterator::withCollection(properties);
	if (!iterator) {
		return;
	}

	while ((iteratorKey = iterator->getNextObject())) {
		OSSymbol *key;

		key = OSDynamicCast(OSSymbol, iteratorKey);
		if (!key) {
			continue;
		}
		obj = properties->getObject(key);
		if (!obj) {
			continue;
		}
		setProperty(key, obj);
	}
	iterator->release();

	settingsChangedSinceUpdate = false;

	// And up goes the flare
	IOMessage notifyMessage = kIOPMMessageBatteryStatusHasChanged;
#if DEVELOPMENT || DEBUG
	os_log(OS_LOG_DEFAULT, "notify clients '%u'\n", (unsigned int)notifyMessage);
#endif
	messageClients(notifyMessage);
}


/*******************************************************************************
 *
 * PROTECTED Accessors. All the setters! Yay!
 *
 ******************************************************************************/

void
IOPMPowerSource::setPSProperty(const OSSymbol *key, OSObject *val)
{
	OSObject    *lastVal;

	if (!key || !val) {
		return;
	}

	// Compare new setting with existing setting; update
	// 'settingsChangedSinceUpdate' if the setting has changed.
	// If values are OSNumbers, do equality comparison.
	// Otherwise, just compare pointers.

	if ((lastVal = properties->getObject(key))) {
		if (val->isEqualTo(lastVal)) {
			// settings didn't change
		} else {
			// num val is not equal to last val
			settingsChangedSinceUpdate = true;
		}
	} else {
		// new setting; no last value
		settingsChangedSinceUpdate = true;
	}

	// here's the part where we go crazy.
	properties->setObject(key, val);
}



void
IOPMPowerSource::setExternalConnected(bool b)
{
	setPSProperty(externalConnectedKey,
	    b ? kOSBooleanTrue : kOSBooleanFalse);
}

void
IOPMPowerSource::setExternalChargeCapable(bool b)
{
	setPSProperty(externalChargeCapableKey,
	    b ? kOSBooleanTrue : kOSBooleanFalse);
}

void
IOPMPowerSource::setBatteryInstalled(bool b)
{
	setPSProperty(batteryInstalledKey,
	    b ? kOSBooleanTrue : kOSBooleanFalse);
}

void
IOPMPowerSource::setIsCharging(bool b)
{
	setPSProperty(chargingKey,
	    b ? kOSBooleanTrue : kOSBooleanFalse);
}

void
IOPMPowerSource::setAtWarnLevel(bool b)
{
	setPSProperty(warnLevelKey,
	    b ? kOSBooleanTrue : kOSBooleanFalse);
}

void
IOPMPowerSource::setAtCriticalLevel(bool b)
{
	setPSProperty(criticalLevelKey,
	    b ? kOSBooleanTrue : kOSBooleanFalse);
}


void
IOPMPowerSource::setCurrentCapacity(unsigned int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(currentCapacityKey, n);
	n->release();
}

void
IOPMPowerSource::setMaxCapacity(unsigned int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(maxCapacityKey, n);
	n->release();
}

void
IOPMPowerSource::setTimeRemaining(int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(timeRemainingKey, n);
	n->release();
}

void
IOPMPowerSource::setAmperage(int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(amperageKey, n);
	n->release();
}

void
IOPMPowerSource::setVoltage(unsigned int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(voltageKey, n);
	n->release();
}

void
IOPMPowerSource::setCycleCount(unsigned int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(cycleCountKey, n);
	n->release();
}

void
IOPMPowerSource::setAdapterInfo(int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(adapterInfoKey, n);
	n->release();
}

void
IOPMPowerSource::setLocation(int val)
{
	OSNumber *n = OSNumber::withNumber(val, 32);
	setPSProperty(locationKey, n);
	n->release();
}

void
IOPMPowerSource::setErrorCondition(OSSymbol *s)
{
	setPSProperty(errorConditionKey, s);
}

void
IOPMPowerSource::setManufacturer(OSSymbol *s)
{
	setPSProperty(manufacturerKey, s);
}

void
IOPMPowerSource::setModel(OSSymbol *s)
{
	setPSProperty(modelKey, s);
}

void
IOPMPowerSource::setSerial(OSSymbol *s)
{
	setPSProperty(serialKey, s);
}

void
IOPMPowerSource::setLegacyIOBatteryInfo(OSDictionary *d)
{
	setPSProperty(batteryInfoKey, d);
}




/*******************************************************************************
 *
 * PUBLIC Accessors. All the getters! Boo!
 *
 ******************************************************************************/

OSObject *
IOPMPowerSource::getPSProperty(const OSSymbol *symmie)
{
	if (!symmie) {
		return NULL;
	}
	return properties->getObject(symmie);
}

bool
IOPMPowerSource::externalConnected(void)
{
	return kOSBooleanTrue == properties->getObject(externalConnectedKey);
}

bool
IOPMPowerSource::externalChargeCapable(void)
{
	return kOSBooleanTrue == properties->getObject(externalChargeCapableKey);
}

bool
IOPMPowerSource::batteryInstalled(void)
{
	return kOSBooleanTrue == properties->getObject(batteryInstalledKey);
}

bool
IOPMPowerSource::isCharging(void)
{
	return kOSBooleanTrue == properties->getObject(chargingKey);
}

bool
IOPMPowerSource::atWarnLevel(void)
{
	return kOSBooleanTrue == properties->getObject(warnLevelKey);
}

bool
IOPMPowerSource::atCriticalLevel(void)
{
	return kOSBooleanTrue == properties->getObject(criticalLevelKey);
}

unsigned int
IOPMPowerSource::currentCapacity(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(currentCapacityKey));
	if (!n) {
		return 0;
	} else {
		return (unsigned int)n->unsigned32BitValue();
	}
}

unsigned int
IOPMPowerSource::maxCapacity(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(maxCapacityKey));
	if (!n) {
		return 0;
	} else {
		return (unsigned int)n->unsigned32BitValue();
	}
}

unsigned int
IOPMPowerSource::capacityPercentRemaining(void)
{
	unsigned int _currentCapacity = currentCapacity();
	unsigned int _maxCapacity = maxCapacity();
	if (0 == _maxCapacity) {
		return 0;
	} else {
		return (100 * _currentCapacity) / _maxCapacity;
	}
}

int
IOPMPowerSource::timeRemaining(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(timeRemainingKey));
	if (!n) {
		return 0;
	} else {
		return (int)n->unsigned32BitValue();
	}
}

int
IOPMPowerSource::amperage(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(amperageKey));
	if (!n) {
		return 0;
	} else {
		return (int)n->unsigned32BitValue();
	}
}

unsigned int
IOPMPowerSource::voltage(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(voltageKey));
	if (!n) {
		return 0;
	} else {
		return (unsigned int)n->unsigned32BitValue();
	}
}

unsigned int
IOPMPowerSource::cycleCount(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(cycleCountKey));
	if (!n) {
		return 0;
	} else {
		return (unsigned int)n->unsigned32BitValue();
	}
}

int
IOPMPowerSource::adapterInfo(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(adapterInfoKey));
	if (!n) {
		return 0;
	} else {
		return (int)n->unsigned32BitValue();
	}
}

int
IOPMPowerSource::location(void)
{
	OSNumber        *n;
	n = OSDynamicCast(OSNumber, properties->getObject(locationKey));
	if (!n) {
		return 0;
	} else {
		return (unsigned int)n->unsigned32BitValue();
	}
}

OSSymbol *
IOPMPowerSource::errorCondition(void)
{
	return OSDynamicCast(OSSymbol, properties->getObject(errorConditionKey));
}

OSSymbol *
IOPMPowerSource::manufacturer(void)
{
	return OSDynamicCast(OSSymbol, properties->getObject(manufacturerKey));
}

OSSymbol *
IOPMPowerSource::model(void)
{
	return OSDynamicCast(OSSymbol, properties->getObject(modelKey));
}

OSSymbol *
IOPMPowerSource::serial(void)
{
	return OSDynamicCast(OSSymbol, properties->getObject(serialKey));
}

OSDictionary *
IOPMPowerSource::legacyIOBatteryInfo(void)
{
	return OSDynamicCast(OSDictionary, properties->getObject(batteryInfoKey));
}