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 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 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 90 OSBoolean::taggedRetain(__unused const void *tag) const 91 { 92 } 93 void 94 OSBoolean::taggedRelease(__unused const void *tag, __unused const int when) const 95 { 96 } 97 98 OSBoolean * 99 OSBoolean::withBoolean(bool inValue) 100 { 101 return (inValue) ? kOSBooleanTrue : kOSBooleanFalse; 102 } 103 104 bool 105 OSBoolean::isTrue() const 106 { 107 return value; 108 } 109 bool 110 OSBoolean::isFalse() const 111 { 112 return !value; 113 } 114 bool 115 OSBoolean::getValue() const 116 { 117 return value; 118 } 119 120 bool 121 OSBoolean::isEqualTo(const OSBoolean *boolean) const 122 { 123 return boolean == this; 124 } 125 126 bool 127 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 138 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