1 /*
2 * Copyright (c) 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 /* OSBoolean.cpp created by rsulack on Tue Oct 12 1999 */
29
30 #include <libkern/c++/OSBoolean.h>
31 #include <libkern/c++/OSString.h>
32 #include <libkern/c++/OSSerialize.h>
33 #include <libkern/c++/OSLib.h>
34
35 #define super OSObject
36
37 OSDefineMetaClassAndStructorsWithInit(OSBoolean, OSObject, OSBoolean::initialize())
38 OSMetaClassDefineReservedUnused(OSBoolean, 0);
39 OSMetaClassDefineReservedUnused(OSBoolean, 1);
40 OSMetaClassDefineReservedUnused(OSBoolean, 2);
41 OSMetaClassDefineReservedUnused(OSBoolean, 3);
42 OSMetaClassDefineReservedUnused(OSBoolean, 4);
43 OSMetaClassDefineReservedUnused(OSBoolean, 5);
44 OSMetaClassDefineReservedUnused(OSBoolean, 6);
45 OSMetaClassDefineReservedUnused(OSBoolean, 7);
46
47 static OSBoolean * gOSBooleanTrue = NULL;
48 static OSBoolean * gOSBooleanFalse = NULL;
49
50 OSBoolean * const & kOSBooleanTrue = gOSBooleanTrue;
51 OSBoolean * const & kOSBooleanFalse = gOSBooleanFalse;
52
53 void
initialize()54 OSBoolean::initialize()
55 {
56 gOSBooleanTrue = new OSBoolean;
57 assert(gOSBooleanTrue);
58
59 if (!gOSBooleanTrue->init()) {
60 gOSBooleanTrue->OSObject::free();
61 assert(false);
62 }
63 ;
64 gOSBooleanTrue->value = true;
65
66 gOSBooleanFalse = new OSBoolean;
67 assert(gOSBooleanFalse);
68
69 if (!gOSBooleanFalse->init()) {
70 gOSBooleanFalse->OSObject::free();
71 assert(false);
72 }
73 ;
74 gOSBooleanFalse->value = false;
75 }
76
77 void
free()78 OSBoolean::free()
79 {
80 /*
81 * An OSBoolean should never have free() called on it, since it is a shared
82 * object, with two non-mutable instances: kOSBooleanTrue, kOSBooleanFalse.
83 * There will be cases where an incorrect number of releases will cause the
84 * free() method to be called, however, which we must catch and ignore here.
85 */
86 assert(false);
87 }
88
89 void
taggedRetain(__unused const void * tag) const90 OSBoolean::taggedRetain(__unused const void *tag) const
91 {
92 }
93 void
taggedRelease(__unused const void * tag,__unused const int when) const94 OSBoolean::taggedRelease(__unused const void *tag, __unused const int when) const
95 {
96 }
97
98 OSBoolean *
withBoolean(bool inValue)99 OSBoolean::withBoolean(bool inValue)
100 {
101 return (inValue) ? kOSBooleanTrue : kOSBooleanFalse;
102 }
103
104 bool
isTrue() const105 OSBoolean::isTrue() const
106 {
107 return value;
108 }
109 bool
isFalse() const110 OSBoolean::isFalse() const
111 {
112 return !value;
113 }
114 bool
getValue() const115 OSBoolean::getValue() const
116 {
117 return value;
118 }
119
120 bool
isEqualTo(const OSBoolean * boolean) const121 OSBoolean::isEqualTo(const OSBoolean *boolean) const
122 {
123 return boolean == this;
124 }
125
126 bool
isEqualTo(const OSMetaClassBase * obj) const127 OSBoolean::isEqualTo(const OSMetaClassBase *obj) const
128 {
129 OSBoolean * boolean;
130 if ((boolean = OSDynamicCast(OSBoolean, obj))) {
131 return isEqualTo(boolean);
132 } else {
133 return false;
134 }
135 }
136
137 bool
serialize(OSSerialize * s) const138 OSBoolean::serialize(OSSerialize *s) const
139 {
140 if (s->binary) {
141 return s->binarySerialize(this);
142 }
143
144 return s->addString(value ? "<true/>" : "<false/>");
145 }
146