runtime/objc-api.h

   1 /*
   2  * Copyright (c) 1999-2006 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 // Copyright 1988-1996 NeXT Software, Inc.
  24
  25 #ifndef _OBJC_OBJC_API_H_
  26 #define _OBJC_OBJC_API_H_
  27
  28 #include <Availability.h>
  29 #include <AvailabilityMacros.h>
  30 #include <TargetConditionals.h>
  31
  32 #ifndef __has_feature
  33 #   define __has_feature(x) 0
  34 #endif
  35
  36 #ifndef __has_extension
  37 #   define __has_extension __has_feature
  38 #endif
  39
  40
  41 /*
  42  * OBJC_API_VERSION 0 or undef: Tiger and earlier API only
  43  * OBJC_API_VERSION 2: Leopard and later API available
  44  */
  45 #if !defined(OBJC_API_VERSION)
  46 #   if defined(__MAC_OS_X_VERSION_MIN_REQUIRED)  &&  __MAC_OS_X_VERSION_MIN_REQUIRED < __MAC_10_5
  47 #       define OBJC_API_VERSION 0
  48 #   else
  49 #       define OBJC_API_VERSION 2
  50 #   endif
  51 #endif
  52
  53
  54 /* OBJC_OLD_DISPATCH_PROTOTYPES == 0 enforces the rule that the dispatch
  55  * functions must be cast to an appropriate function pointer type. */
  56 #if !defined(OBJC_OLD_DISPATCH_PROTOTYPES)
  57 #   define OBJC_OLD_DISPATCH_PROTOTYPES 1
  58 #endif
  59
  60
  61 /* OBJC2_UNAVAILABLE: unavailable in objc 2.0, deprecated in Leopard */
  62 #if !defined(OBJC2_UNAVAILABLE)
  63 #   if __OBJC2__
  64 #       define OBJC2_UNAVAILABLE UNAVAILABLE_ATTRIBUTE
  65 #   else
  66 #       define OBJC2_UNAVAILABLE DEPRECATED_IN_MAC_OS_X_VERSION_10_5_AND_LATER
  67 #   endif
  68 #endif
  69
  70 /* OBJC_ARC_UNAVAILABLE: unavailable with -fobjc-arc */
  71 #if !defined(OBJC_ARC_UNAVAILABLE)
  72 #   if __has_feature(objc_arr)
  73 #       if __has_extension(attribute_unavailable_with_message)
  74 #           define OBJC_ARC_UNAVAILABLE __attribute__((unavailable("not available in automatic reference counting mode")))
  75 #       else
  76 #           define OBJC_ARC_UNAVAILABLE __attribute__((unavailable))
  77 #       endif
  78 #   else
  79 #       define OBJC_ARC_UNAVAILABLE
  80 #   endif
  81 #endif
  82
  83 /* OBJC_GC_UNAVAILABLE: unavailable with -fobjc-gc or -fobjc-gc-only */
  84 #if !defined(OBJC_GC_UNAVAILABLE)
  85 #   if __OBJC_GC__
  86 #       if __has_extension(attribute_unavailable_with_message)
  87 #           define OBJC_GC_UNAVAILABLE __attribute__((unavailable("not available in garbage collecting mode")))
  88 #       else
  89 #           define OBJC_GC_UNAVAILABLE __attribute__((unavailable))
  90 #       endif
  91 #   else
  92 #       define OBJC_GC_UNAVAILABLE
  93 #   endif
  94 #endif
  95
  96 #if !defined(OBJC_EXTERN)
  97 #   if defined(__cplusplus)
  98 #       define OBJC_EXTERN extern "C"
  99 #   else
 100 #       define OBJC_EXTERN extern
 101 #   endif
 102 #endif
 103
 104 #if !defined(OBJC_VISIBLE)
 105 #   if TARGET_OS_WIN32
 106 #       if defined(BUILDING_OBJC)
 107 #           define OBJC_VISIBLE __declspec(dllexport)
 108 #       else
 109 #           define OBJC_VISIBLE __declspec(dllimport)
 110 #       endif
 111 #   else
 112 #       define OBJC_VISIBLE  __attribute__((visibility("default")))
 113 #   endif
 114 #endif
 115
 116 #if !defined(OBJC_EXPORT)
 117 #   define OBJC_EXPORT  OBJC_EXTERN OBJC_VISIBLE
 118 #endif
 119
 120 #if !defined(OBJC_IMPORT)
 121 #   define OBJC_IMPORT extern
 122 #endif
 123
 124 #ifndef __DARWIN_NULL
 125 #define __DARWIN_NULL NULL
 126 #endif
 127
 128 #if !defined(OBJC_INLINE)
 129 #   define OBJC_INLINE __inline
 130 #endif
 131
 132 #endif