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
37OSDefineMetaClassAndStructorsWithInit(OSBoolean, OSObject, OSBoolean::initialize())
38OSMetaClassDefineReservedUnused(OSBoolean, 0);
39OSMetaClassDefineReservedUnused(OSBoolean, 1);
40OSMetaClassDefineReservedUnused(OSBoolean, 2);
41OSMetaClassDefineReservedUnused(OSBoolean, 3);
42OSMetaClassDefineReservedUnused(OSBoolean, 4);
43OSMetaClassDefineReservedUnused(OSBoolean, 5);
44OSMetaClassDefineReservedUnused(OSBoolean, 6);
45OSMetaClassDefineReservedUnused(OSBoolean, 7);
46
47static OSBoolean * gOSBooleanTrue = 0;
48static OSBoolean * gOSBooleanFalse = 0;
49
50OSBoolean * const & kOSBooleanTrue = gOSBooleanTrue;
51OSBoolean * const & kOSBooleanFalse = gOSBooleanFalse;
52
53void OSBoolean::initialize()
54{
55 gOSBooleanTrue = new OSBoolean;
56 assert(gOSBooleanTrue);
57
58 if (!gOSBooleanTrue->init()) {
59 gOSBooleanTrue->OSObject::free();
60 assert(false);
61 };
62 gOSBooleanTrue->value = true;
63
64 gOSBooleanFalse = new OSBoolean;
65 assert(gOSBooleanFalse);
66
67 if (!gOSBooleanFalse->init()) {
68 gOSBooleanFalse->OSObject::free();
69 assert(false);
70 };
71 gOSBooleanFalse->value = false;
72}
73
74void OSBoolean::free()
75{
76 /*
77 * An OSBoolean should never have free() called on it, since it is a shared
78 * object, with two non-mutable instances: kOSBooleanTrue, kOSBooleanFalse.
79 * There will be cases where an incorrect number of releases will cause the
80 * free() method to be called, however, which we must catch and ignore here.
81 */
82 assert(false);
83}
84
85void OSBoolean::taggedRetain(__unused const void *tag) const { }
86void OSBoolean::taggedRelease(__unused const void *tag, __unused const int when) const { }
87
88OSBoolean *OSBoolean::withBoolean(bool inValue)
89{
90 return (inValue) ? kOSBooleanTrue : kOSBooleanFalse;
91}
92
93bool OSBoolean::isTrue() const { return value; }
94bool OSBoolean::isFalse() const { return !value; }
95bool OSBoolean::getValue() const { return value; }
96
97bool OSBoolean::isEqualTo(const OSBoolean *boolean) const
98{
99 return (boolean == this);
100}
101
102bool OSBoolean::isEqualTo(const OSMetaClassBase *obj) const
103{
104 OSBoolean * boolean;
105 if ((boolean = OSDynamicCast(OSBoolean, obj)))
106 return isEqualTo(boolean);
107 else
108 return false;
109}
110
111bool OSBoolean::serialize(OSSerialize *s) const
112{
113 if (s->binary) return s->binarySerialize(this);
114
115 return s->addString(value ? "<true/>" : "<false/>");
116}
117