runtime/objc.h

   1 /*
   2  * Copyright (c) 1999-2007 Apple Inc.  All Rights Reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  *      objc.h
  25  *      Copyright 1988-1996, NeXT Software, Inc.
  26  */
  27
  28 #ifndef _OBJC_OBJC_H_
  29 #define _OBJC_OBJC_H_
  30
  31 #include <sys/types.h>      // for __DARWIN_NULL
  32 #include <Availability.h>
  33 #include <objc/objc-api.h>
  34
  35
  36 typedef struct objc_class *Class;
  37 typedef struct objc_object {
  38     Class isa;
  39 } *id;
  40
  41
  42 typedef struct objc_selector    *SEL;
  43
  44 #if !OBJC_OLD_DISPATCH_PROTOTYPES
  45 typedef void (*IMP)(void /* id, SEL, ... */ );
  46 #else
  47 typedef id (*IMP)(id, SEL, ...);
  48 #endif
  49
  50 #define OBJC_BOOL_DEFINED
  51
  52 typedef signed char             BOOL;
  53 // BOOL is explicitly signed so @encode(BOOL) == "c" rather than "C"
  54 // even if -funsigned-char is used.
  55
  56 #if __has_feature(objc_bool)
  57 #define YES             __objc_yes
  58 #define NO              __objc_no
  59 #else
  60 #define YES             ((BOOL)1)
  61 #define NO              ((BOOL)0)
  62 #endif
  63
  64 #ifndef Nil
  65 # if __has_feature(cxx_nullptr)
  66 #   define Nil nullptr
  67 # else
  68 #   define Nil __DARWIN_NULL
  69 # endif
  70 #endif
  71
  72 #ifndef nil
  73 # if __has_feature(cxx_nullptr)
  74 #   define nil nullptr
  75 # else
  76 #   define nil __DARWIN_NULL
  77 # endif
  78 #endif
  79
  80 #if ! (defined(__OBJC_GC__)  ||  __has_feature(objc_arr))
  81 #define __strong /* empty */
  82 #endif
  83
  84 #if !__has_feature(objc_arr)
  85 #define __unsafe_unretained /* empty */
  86 #define __autoreleasing /* empty */
  87 #endif
  88
  89
  90 OBJC_EXPORT const char *sel_getName(SEL sel)
  91     __OSX_AVAILABLE_STARTING(__MAC_10_0, __IPHONE_2_0);
  92 OBJC_EXPORT SEL sel_registerName(const char *str)
  93     __OSX_AVAILABLE_STARTING(__MAC_10_0, __IPHONE_2_0);
  94 OBJC_EXPORT const char *object_getClassName(id obj)
  95     __OSX_AVAILABLE_STARTING(__MAC_10_0, __IPHONE_2_0);
  96 OBJC_EXPORT void *object_getIndexedIvars(id obj)
  97     __OSX_AVAILABLE_STARTING(__MAC_10_0, __IPHONE_2_0);
  98 OBJC_EXPORT BOOL sel_isMapped(SEL sel)
  99     __OSX_AVAILABLE_STARTING(__MAC_10_0, __IPHONE_2_0);
 100 OBJC_EXPORT SEL sel_getUid(const char *str)
 101     __OSX_AVAILABLE_STARTING(__MAC_10_0, __IPHONE_2_0);
 102
 103
 104 // Obsolete ARC conversions. Deprecation forthcoming.
 105 // Use CFBridgingRetain, CFBridgingRelease, and __bridge casts instead.
 106
 107 typedef const void* objc_objectptr_t;
 108
 109 #if __has_feature(objc_arc)
 110 #   define objc_retainedObject(o) ((__bridge_transfer id)(objc_objectptr_t)(o))
 111 #   define objc_unretainedObject(o) ((__bridge id)(objc_objectptr_t)(o))
 112 #   define objc_unretainedPointer(o) ((__bridge objc_objectptr_t)(id)(o))
 113 #else
 114 #   define objc_retainedObject(o) ((id)(objc_objectptr_t)(o))
 115 #   define objc_unretainedObject(o) ((id)(objc_objectptr_t)(o))
 116 #   define objc_unretainedPointer(o) ((objc_objectptr_t)(id)(o))
 117 #endif
 118
 119
 120 #if !__OBJC2__
 121
 122 // The following declarations are provided here for source compatibility.
 123
 124 #if defined(__LP64__)
 125     typedef long arith_t;
 126     typedef unsigned long uarith_t;
 127 #   define ARITH_SHIFT 32
 128 #else
 129     typedef int arith_t;
 130     typedef unsigned uarith_t;
 131 #   define ARITH_SHIFT 16
 132 #endif
 133
 134 typedef char *STR;
 135
 136 #define ISSELECTOR(sel) sel_isMapped(sel)
 137 #define SELNAME(sel)    sel_getName(sel)
 138 #define SELUID(str)     sel_getUid(str)
 139 #define NAMEOF(obj)     object_getClassName(obj)
 140 #define IV(obj)         object_getIndexedIvars(obj)
 141
 142 #endif
 143
 144 #endif  /* _OBJC_OBJC_H_ */