| 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 <IOKit/pwr_mgt/IOPM.h> |
| 29 | #include <IOKit/pwr_mgt/IOPMPowerSourceList.h> |
| 30 | #include <IOKit/pwr_mgt/IOPMPowerSource.h> |
| 31 | |
| 32 | #define super OSObject |
| 33 | OSDefineMetaClassAndStructors(IOPMPowerSourceList, OSObject) |
| 34 | |
| 35 | //****************************************************************************** |
| 36 | // init |
| 37 | // |
| 38 | //****************************************************************************** |
| 39 | void |
| 40 | IOPMPowerSourceList::initialize( void ) |
| 41 | { |
| 42 | firstItem = NULL; |
| 43 | length = 0; |
| 44 | } |
| 45 | |
| 46 | //****************************************************************************** |
| 47 | // addToList |
| 48 | // |
| 49 | //****************************************************************************** |
| 50 | |
| 51 | IOReturn |
| 52 | IOPMPowerSourceList::addToList(IOPMPowerSource *newPowerSource) |
| 53 | { |
| 54 | IOPMPowerSource * nextPowerSource; |
| 55 | |
| 56 | // Is new object already in the list? |
| 57 | nextPowerSource = firstItem; |
| 58 | while (nextPowerSource != NULL) { |
| 59 | if (nextPowerSource == newPowerSource) { |
| 60 | // yes, just return |
| 61 | return IOPMNoErr; |
| 62 | } |
| 63 | nextPowerSource = nextInList(nextPowerSource); |
| 64 | } |
| 65 | |
| 66 | // add it to list |
| 67 | newPowerSource->nextInList = firstItem; |
| 68 | firstItem = newPowerSource; |
| 69 | length++; |
| 70 | return IOPMNoErr; |
| 71 | } |
| 72 | |
| 73 | |
| 74 | //****************************************************************************** |
| 75 | // firstInList |
| 76 | // |
| 77 | //****************************************************************************** |
| 78 | |
| 79 | IOPMPowerSource * |
| 80 | IOPMPowerSourceList::firstInList( void ) |
| 81 | { |
| 82 | return firstItem; |
| 83 | } |
| 84 | |
| 85 | //****************************************************************************** |
| 86 | // nextInList |
| 87 | // |
| 88 | //****************************************************************************** |
| 89 | |
| 90 | IOPMPowerSource * |
| 91 | IOPMPowerSourceList::nextInList(IOPMPowerSource *currentItem) |
| 92 | { |
| 93 | if (currentItem != NULL) { |
| 94 | return currentItem->nextInList; |
| 95 | } |
| 96 | return NULL; |
| 97 | } |
| 98 | |
| 99 | //****************************************************************************** |
| 100 | // numberOfItems |
| 101 | // |
| 102 | //****************************************************************************** |
| 103 | |
| 104 | unsigned long |
| 105 | IOPMPowerSourceList::numberOfItems( void ) |
| 106 | { |
| 107 | return length; |
| 108 | } |
| 109 | |
| 110 | //****************************************************************************** |
| 111 | // removeFromList |
| 112 | // |
| 113 | // Find the item in the list, unlink it, and free it. |
| 114 | //****************************************************************************** |
| 115 | |
| 116 | IOReturn |
| 117 | IOPMPowerSourceList::removeFromList( IOPMPowerSource * theItem ) |
| 118 | { |
| 119 | IOPMPowerSource * item = firstItem; |
| 120 | IOPMPowerSource * temp; |
| 121 | |
| 122 | if (NULL == item) { |
| 123 | goto exit; |
| 124 | } |
| 125 | |
| 126 | if (item == theItem) { |
| 127 | firstItem = item->nextInList; |
| 128 | length--; |
| 129 | item->release(); |
| 130 | return IOPMNoErr; |
| 131 | } |
| 132 | while (item->nextInList != NULL) { |
| 133 | if (item->nextInList == theItem) { |
| 134 | temp = item->nextInList; |
| 135 | item->nextInList = temp->nextInList; |
| 136 | length--; |
| 137 | temp->release(); |
| 138 | return IOPMNoErr; |
| 139 | } |
| 140 | item = item->nextInList; |
| 141 | } |
| 142 | |
| 143 | exit: |
| 144 | return IOPMNoErr; |
| 145 | } |
| 146 | |
| 147 | |
| 148 | //****************************************************************************** |
| 149 | // free |
| 150 | // |
| 151 | // Free all items in the list, and then free the list itself |
| 152 | //****************************************************************************** |
| 153 | |
| 154 | void |
| 155 | IOPMPowerSourceList::free(void ) |
| 156 | { |
| 157 | IOPMPowerSource * next = firstItem; |
| 158 | |
| 159 | while (next != NULL) { |
| 160 | firstItem = next->nextInList; |
| 161 | length--; |
| 162 | next->release(); |
| 163 | next = firstItem; |
| 164 | } |
| 165 | super::free(); |
| 166 | } |