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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 |