/* * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This 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 OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <IOKit/pwr_mgt/IOPM.h> #include <IOKit/pwr_mgt/IOPMPowerSourceList.h> #include <IOKit/pwr_mgt/IOPMPowerSource.h> #define super OSObject OSDefineMetaClassAndStructors(IOPMPowerSourceList,OSObject) //****************************************************************************** // init // //****************************************************************************** void IOPMPowerSourceList::initialize ( void ) { firstItem = NULL; length = 0; } //****************************************************************************** // addToList // //****************************************************************************** IOReturn IOPMPowerSourceList::addToList(IOPMPowerSource *newPowerSource) { IOPMPowerSource * nextPowerSource; // Is new object already in the list? nextPowerSource = firstItem; while ( nextPowerSource != NULL ) { if ( nextPowerSource == newPowerSource ) { // yes, just return return IOPMNoErr; } nextPowerSource = nextInList(nextPowerSource); } // add it to list newPowerSource->nextInList = firstItem; firstItem = newPowerSource; length++; return IOPMNoErr; } //****************************************************************************** // firstInList // //****************************************************************************** IOPMPowerSource * IOPMPowerSourceList::firstInList ( void ) { return firstItem; } //****************************************************************************** // nextInList // //****************************************************************************** IOPMPowerSource * IOPMPowerSourceList::nextInList(IOPMPowerSource *currentItem) { if ( currentItem != NULL ) { return (currentItem->nextInList); } return NULL; } //****************************************************************************** // numberOfItems // //****************************************************************************** unsigned long IOPMPowerSourceList::numberOfItems ( void ) { return length; } //****************************************************************************** // removeFromList // // Find the item in the list, unlink it, and free it. //****************************************************************************** IOReturn IOPMPowerSourceList::removeFromList ( IOPMPowerSource * theItem ) { IOPMPowerSource * item = firstItem; IOPMPowerSource * temp; if ( NULL == item) goto exit; if ( item == theItem ) { firstItem = item->nextInList; length--; item->release(); return IOPMNoErr; } while ( item->nextInList != NULL ) { if ( item->nextInList == theItem ) { temp = item->nextInList; item->nextInList = temp->nextInList; length--; temp->release(); return IOPMNoErr; } item = item->nextInList; } exit: return IOPMNoErr; } //****************************************************************************** // free // // Free all items in the list, and then free the list itself //****************************************************************************** void IOPMPowerSourceList::free (void ) { IOPMPowerSource * next = firstItem; while ( next != NULL ) { firstItem = next->nextInList; length--; next->release(); next = firstItem; } super::free(); }