1/* 2 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28#include <libkern/c++/OSObject.h> 29#include <IOKit/IOLocks.h> 30#include <IOKit/IOReturn.h> 31 32class IOPMinformee; 33class IOService; 34 35class IOPMinformeeList : public OSObject 36{ 37OSDeclareDefaultStructors(IOPMinformeeList) 38 friend class IOPMinformee; 39 40private: 41 // pointer to first informee in the list 42 IOPMinformee *firstItem; 43 // how many informees are in the list 44 unsigned long length; 45 46public: 47 void initialize ( void ); 48 void free ( void ); 49 50 unsigned long numberOfItems ( void ); 51 52 IOPMinformee *appendNewInformee( IOService * newObject ); 53 54 // OBSOLETE 55 // do not use addToList(); Use appendNewInformee() instead 56 IOReturn addToList ( IOPMinformee * newInformee ); 57 IOReturn removeFromList ( IOService * theItem ); 58 59 IOPMinformee * firstInList ( void ); 60 IOPMinformee * nextInList ( IOPMinformee * currentItem ); 61 62 IOPMinformee * findItem ( IOService * driverOrChild ); 63 64 // This lock must be held while modifying list or length 65 static IORecursiveLock * getSharedRecursiveLock( void ); 66}; 67 68