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(currentItem: 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 | } |
167 | |