/* * 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/IOPMinformeeList.h> #include <IOKit/pwr_mgt/IOPMinformee.h> #define super OSObject OSDefineMetaClassAndStructors(IOPMinformeeList,OSObject) //********************************************************************************* // init // //********************************************************************************* void IOPMinformeeList::initialize ( void ) { firstItem = NULL; length = 0; } //********************************************************************************* // addToList // //********************************************************************************* IOReturn IOPMinformeeList::addToList ( IOPMinformee * newInformee ) { IOPMinformee * nextInformee; nextInformee = firstItem; // Is new object already in the list? while ( nextInformee != NULL ) { if ( nextInformee->whatObject == newInformee->whatObject ) { return IOPMNoErr; // yes, just return } nextInformee = nextInList(nextInformee); } newInformee->nextInList = firstItem; // add it to list firstItem = newInformee; length += 1; return IOPMNoErr; } //********************************************************************************* // firstInList // //********************************************************************************* IOPMinformee * IOPMinformeeList::firstInList ( void ) { return firstItem; } //********************************************************************************* // nextInList // //********************************************************************************* IOPMinformee * IOPMinformeeList::nextInList ( IOPMinformee * currentItem ) { if ( currentItem != NULL ) { return (currentItem->nextInList); } return NULL; } //********************************************************************************* // numberOfItems // //********************************************************************************* unsigned long IOPMinformeeList::numberOfItems ( void ) { return length; } //********************************************************************************* // findItem // // Look through the list for the one which points to the object identified // by the parameter. Return a pointer to the list item or NULL. //********************************************************************************* IOPMinformee * IOPMinformeeList::findItem ( IOService * driverOrChild ) { IOPMinformee * nextObject; nextObject = firstInList(); while ( nextObject != NULL ) { if ( nextObject->whatObject == driverOrChild ) { return nextObject; } nextObject = nextInList(nextObject); } return NULL; } //********************************************************************************* // removeFromList // // Find the item in the list, unlink it, and free it. //********************************************************************************* IOReturn IOPMinformeeList::removeFromList ( IOService * theItem ) { IOPMinformee * item = firstItem; IOPMinformee * temp; if ( item != NULL ) { if ( item->whatObject == theItem ) { firstItem = item->nextInList; length--; item->release(); return IOPMNoErr; } while ( item->nextInList != NULL ) { if ( item->nextInList->whatObject == theItem ) { temp = item->nextInList; item->nextInList = temp->nextInList; length--; temp->release(); return IOPMNoErr; } item = item->nextInList; } } return IOPMNoErr; } //********************************************************************************* // free // // Free all items in the list, and then free the list itself //********************************************************************************* void IOPMinformeeList::free (void ) { IOPMinformee * next = firstItem; while ( next != NULL ) { firstItem = next->nextInList; length--; next->release(); next = firstItem; } super::free(); }