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 IOPMPowerSourceList::initialize ( void ) |
40 | { |
41 | firstItem = NULL; |
42 | length = 0; |
43 | } |
44 | |
45 | //****************************************************************************** |
46 | // addToList |
47 | // |
48 | //****************************************************************************** |
49 | |
50 | IOReturn IOPMPowerSourceList::addToList(IOPMPowerSource *newPowerSource) |
51 | { |
52 | IOPMPowerSource * nextPowerSource; |
53 | |
54 | // Is new object already in the list? |
55 | nextPowerSource = firstItem; |
56 | while ( nextPowerSource != NULL ) |
57 | { |
58 | if ( nextPowerSource == newPowerSource ) |
59 | { |
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 * IOPMPowerSourceList::firstInList ( void ) |
80 | { |
81 | return firstItem; |
82 | } |
83 | |
84 | //****************************************************************************** |
85 | // nextInList |
86 | // |
87 | //****************************************************************************** |
88 | |
89 | IOPMPowerSource * IOPMPowerSourceList::nextInList(IOPMPowerSource *currentItem) |
90 | { |
91 | if ( currentItem != NULL ) { |
92 | return (currentItem->nextInList); |
93 | } |
94 | return NULL; |
95 | } |
96 | |
97 | //****************************************************************************** |
98 | // numberOfItems |
99 | // |
100 | //****************************************************************************** |
101 | |
102 | unsigned long IOPMPowerSourceList::numberOfItems ( void ) |
103 | { |
104 | return length; |
105 | } |
106 | |
107 | //****************************************************************************** |
108 | // removeFromList |
109 | // |
110 | // Find the item in the list, unlink it, and free it. |
111 | //****************************************************************************** |
112 | |
113 | IOReturn IOPMPowerSourceList::removeFromList ( IOPMPowerSource * theItem ) |
114 | { |
115 | IOPMPowerSource * item = firstItem; |
116 | IOPMPowerSource * temp; |
117 | |
118 | if ( NULL == item) goto exit; |
119 | |
120 | if ( item == theItem ) { |
121 | firstItem = item->nextInList; |
122 | length--; |
123 | item->release(); |
124 | return IOPMNoErr; |
125 | } |
126 | while ( item->nextInList != NULL ) { |
127 | if ( item->nextInList == theItem ) { |
128 | temp = item->nextInList; |
129 | item->nextInList = temp->nextInList; |
130 | length--; |
131 | temp->release(); |
132 | return IOPMNoErr; |
133 | } |
134 | item = item->nextInList; |
135 | } |
136 | |
137 | exit: |
138 | return IOPMNoErr; |
139 | } |
140 | |
141 | |
142 | //****************************************************************************** |
143 | // free |
144 | // |
145 | // Free all items in the list, and then free the list itself |
146 | //****************************************************************************** |
147 | |
148 | void IOPMPowerSourceList::free (void ) |
149 | { |
150 | IOPMPowerSource * next = firstItem; |
151 | |
152 | while ( next != NULL ) { |
153 | firstItem = next->nextInList; |
154 | length--; |
155 | next->release(); |
156 | next = firstItem; |
157 | } |
158 | super::free(); |
159 | } |
160 | |
161 | |
162 | |
163 | |
164 | |
165 | |
166 | |
167 | |