iokit/IOKit/pwr_mgt/IOPMinformeeList.h

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