EXTERNAL_HEADERS/Availability.h

   1 /*
   2  * Copyright (c) 2007-2015 by 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,
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  18  * Please see the License for the specific language governing rights and
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  20  *
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  22  */
  23
  24 #ifndef __AVAILABILITY__
  25 #define __AVAILABILITY__
  26  /*
  27     These macros are for use in OS header files. They enable function prototypes
  28     and Objective-C methods to be tagged with the OS version in which they
  29     were first available; and, if applicable, the OS version in which they
  30     became deprecated.
  31
  32     The desktop Mac OS X and iOS each have different version numbers.
  33     The __OSX_AVAILABLE_STARTING() macro allows you to specify both the desktop
  34     and iOS version numbers.  For instance:
  35         __OSX_AVAILABLE_STARTING(__MAC_10_2,__IPHONE_2_0)
  36     means the function/method was first available on Mac OS X 10.2 on the desktop
  37     and first available in iOS 2.0 on the iPhone.
  38
  39     If a function is available on one platform, but not the other a _NA (not
  40     applicable) parameter is used.  For instance:
  41             __OSX_AVAILABLE_STARTING(__MAC_10_3,__IPHONE_NA)
  42     means that the function/method was first available on Mac OS X 10.3, and it
  43     currently not implemented on the iPhone.
  44
  45     At some point, a function/method may be deprecated.  That means Apple
  46     recommends applications stop using the function, either because there is a
  47     better replacement or the functionality is being phased out.  Deprecated
  48     functions/methods can be tagged with a __OSX_AVAILABLE_BUT_DEPRECATED()
  49     macro which specifies the OS version where the function became available
  50     as well as the OS version in which it became deprecated.  For instance:
  51         __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_0,__MAC_10_5,__IPHONE_NA,__IPHONE_NA)
  52     means that the function/method was introduced in Mac OS X 10.0, then
  53     became deprecated beginning in Mac OS X 10.5.  On iOS the function
  54     has never been available.
  55
  56     For these macros to function properly, a program must specify the OS version range
  57     it is targeting.  The min OS version is specified as an option to the compiler:
  58     -mmacosx-version-min=10.x when building for Mac OS X, and -miphoneos-version-min=y.z
  59     when building for the iPhone.  The upper bound for the OS version is rarely needed,
  60     but it can be set on the command line via: -D__MAC_OS_X_VERSION_MAX_ALLOWED=10x0 for
  61     Mac OS X and __IPHONE_OS_VERSION_MAX_ALLOWED = y0z00 for iOS.
  62
  63     Examples:
  64
  65         A function available in Mac OS X 10.5 and later, but not on the phone:
  66
  67             extern void mymacfunc() __OSX_AVAILABLE_STARTING(__MAC_10_5,__IPHONE_NA);
  68
  69
  70         An Objective-C method in Mac OS X 10.5 and later, but not on the phone:
  71
  72             @interface MyClass : NSObject
  73             -(void) mymacmethod __OSX_AVAILABLE_STARTING(__MAC_10_5,__IPHONE_NA);
  74             @end
  75
  76
  77         An enum available on the phone, but not available on Mac OS X:
  78
  79             #if __IPHONE_OS_VERSION_MIN_REQUIRED
  80                 enum { myEnum = 1 };
  81             #endif
  82            Note: this works when targeting the Mac OS X platform because
  83            __IPHONE_OS_VERSION_MIN_REQUIRED is undefined which evaluates to zero.
  84
  85
  86         An enum with values added in different iPhoneOS versions:
  87
  88                         enum {
  89                             myX  = 1,   // Usable on iPhoneOS 2.1 and later
  90                             myY  = 2,   // Usable on iPhoneOS 3.0 and later
  91                             myZ  = 3,   // Usable on iPhoneOS 3.0 and later
  92                                 ...
  93                       Note: you do not want to use #if with enumeration values
  94                           when a client needs to see all values at compile time
  95                           and use runtime logic to only use the viable values.
  96
  97
  98     It is also possible to use the *_VERSION_MIN_REQUIRED in source code to make one
  99     source base that can be compiled to target a range of OS versions.  It is best
 100     to not use the _MAC_* and __IPHONE_* macros for comparisons, but rather their values.
 101     That is because you might get compiled on an old OS that does not define a later
 102     OS version macro, and in the C preprocessor undefined values evaluate to zero
 103     in expresssions, which could cause the #if expression to evaluate in an unexpected
 104     way.
 105
 106         #ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
 107             // code only compiled when targeting Mac OS X and not iPhone
 108             // note use of 1050 instead of __MAC_10_5
 109             #if __MAC_OS_X_VERSION_MIN_REQUIRED < 1050
 110                 // code in here might run on pre-Leopard OS
 111             #else
 112                 // code here can assume Leopard or later
 113             #endif
 114         #endif
 115
 116
 117 */
 118
 119 #define __MAC_10_0            1000
 120 #define __MAC_10_1            1010
 121 #define __MAC_10_2            1020
 122 #define __MAC_10_3            1030
 123 #define __MAC_10_4            1040
 124 #define __MAC_10_5            1050
 125 #define __MAC_10_6            1060
 126 #define __MAC_10_7            1070
 127 #define __MAC_10_8            1080
 128 #define __MAC_10_9            1090
 129 #define __MAC_10_10         101000
 130 #define __MAC_10_10_2       101002
 131 #define __MAC_10_10_3       101003
 132 #define __MAC_10_11         101100
 133 #define __MAC_10_12         101200
 134 /* __MAC_NA is not defined to a value but is uses as a token by macros to indicate that the API is unavailable */
 135
 136 #define __IPHONE_2_0      20000
 137 #define __IPHONE_2_1      20100
 138 #define __IPHONE_2_2      20200
 139 #define __IPHONE_3_0      30000
 140 #define __IPHONE_3_1      30100
 141 #define __IPHONE_3_2      30200
 142 #define __IPHONE_4_0      40000
 143 #define __IPHONE_4_1      40100
 144 #define __IPHONE_4_2      40200
 145 #define __IPHONE_4_3      40300
 146 #define __IPHONE_5_0      50000
 147 #define __IPHONE_5_1      50100
 148 #define __IPHONE_6_0      60000
 149 #define __IPHONE_6_1      60100
 150 #define __IPHONE_7_0      70000
 151 #define __IPHONE_7_1      70100
 152 #define __IPHONE_8_0      80000
 153 #define __IPHONE_8_1      80100
 154 #define __IPHONE_8_2      80200
 155 #define __IPHONE_8_3      80300
 156 #define __IPHONE_8_4      80400
 157 #define __IPHONE_9_0      90000
 158 #define __IPHONE_9_1      90100
 159 #define __IPHONE_9_2      90200
 160 #define __IPHONE_10_0    100000
 161 /* __IPHONE_NA is not defined to a value but is uses as a token by macros to indicate that the API is unavailable */
 162
 163 #define __TVOS_9_0        90000
 164 #define __TVOS_9_2        90200
 165 #define __TVOS_10_0      100000
 166
 167 #define __WATCHOS_1_0     10000
 168 #define __WATCHOS_2_0     20000
 169 #define __WATCHOS_3_0     30000
 170
 171 #include <AvailabilityInternal.h>
 172
 173 #ifdef __IPHONE_OS_VERSION_MIN_REQUIRED
 174     #define __OSX_AVAILABLE_STARTING(_osx, _ios) __AVAILABILITY_INTERNAL##_ios
 175     #define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep) \
 176                                                     __AVAILABILITY_INTERNAL##_iosIntro##_DEP##_iosDep
 177     #define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg) \
 178                                                     __AVAILABILITY_INTERNAL##_iosIntro##_DEP##_iosDep##_MSG(_msg)
 179
 180 #elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
 181     #define __OSX_AVAILABLE_STARTING(_osx, _ios) __AVAILABILITY_INTERNAL##_osx
 182     #define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep) \
 183                                                     __AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep
 184     #define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg) \
 185                                                     __AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep##_MSG(_msg)
 186
 187 #else
 188     #define __OSX_AVAILABLE_STARTING(_osx, _ios)
 189     #define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep)
 190     #define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg)
 191 #endif
 192
 193
 194 #if defined(__has_feature)
 195   #if __has_feature(attribute_availability_with_message)
 196     #define __OS_AVAILABILITY(_target, _availability)            __attribute__((availability(_target,_availability)))
 197     #define __OS_AVAILABILITY_MSG(_target, _availability, _msg)  __attribute__((availability(_target,_availability,message=_msg)))
 198   #else
 199     #define __OS_AVAILABILITY(_target, _availability)
 200     #define __OS_AVAILABILITY_MSG(_target, _availability, _msg)
 201   #endif
 202 #else
 203     #define __OS_AVAILABILITY(_target, _availability)
 204     #define __OS_AVAILABILITY_MSG(_target, _availability, _msg)
 205 #endif
 206
 207
 208 /* for use to document app extension usage */
 209 #if defined(__has_feature)
 210   #if __has_feature(attribute_availability_app_extension)
 211     #define __OSX_EXTENSION_UNAVAILABLE(_msg)  __OS_AVAILABILITY_MSG(macosx_app_extension,unavailable,_msg)
 212     #define __IOS_EXTENSION_UNAVAILABLE(_msg)  __OS_AVAILABILITY_MSG(ios_app_extension,unavailable,_msg)
 213   #else
 214     #define __OSX_EXTENSION_UNAVAILABLE(_msg)
 215     #define __IOS_EXTENSION_UNAVAILABLE(_msg)
 216   #endif
 217 #else
 218     #define __OSX_EXTENSION_UNAVAILABLE(_msg)
 219     #define __IOS_EXTENSION_UNAVAILABLE(_msg)
 220 #endif
 221
 222 #define __OS_EXTENSION_UNAVAILABLE(_msg)  __OSX_EXTENSION_UNAVAILABLE(_msg) __IOS_EXTENSION_UNAVAILABLE(_msg)
 223
 224
 225
 226 /* for use marking APIs available info for Mac OSX */
 227 #if defined(__has_feature)
 228   #if __has_attribute(availability)
 229     #define __OSX_UNAVAILABLE                    __OS_AVAILABILITY(macosx,unavailable)
 230     #define __OSX_AVAILABLE(_vers)               __OS_AVAILABILITY(macosx,introduced=_vers)
 231     #define __OSX_DEPRECATED(_start, _dep, _msg) __OSX_AVAILABLE(_start) __OS_AVAILABILITY_MSG(macosx,deprecated=_dep,_msg)
 232   #endif
 233 #endif
 234
 235 #ifndef __OSX_UNAVAILABLE
 236   #define __OSX_UNAVAILABLE
 237 #endif
 238
 239 #ifndef __OSX_AVAILABLE
 240   #define __OSX_AVAILABLE(_vers)
 241 #endif
 242
 243 #ifndef __OSX_DEPRECATED
 244   #define __OSX_DEPRECATED(_start, _dep, _msg)
 245 #endif
 246
 247
 248 /* for use marking APIs available info for iOS */
 249 #if defined(__has_feature)
 250   #if __has_attribute(availability)
 251     #define __IOS_UNAVAILABLE                    __OS_AVAILABILITY(ios,unavailable)
 252     #define __IOS_PROHIBITED                     __OS_AVAILABILITY(ios,unavailable)
 253     #define __IOS_AVAILABLE(_vers)               __OS_AVAILABILITY(ios,introduced=_vers)
 254     #define __IOS_DEPRECATED(_start, _dep, _msg) __IOS_AVAILABLE(_start) __OS_AVAILABILITY_MSG(ios,deprecated=_dep,_msg)
 255   #endif
 256 #endif
 257
 258 #ifndef __IOS_UNAVAILABLE
 259   #define __IOS_UNAVAILABLE
 260 #endif
 261
 262 #ifndef __IOS_PROHIBITED
 263   #define __IOS_PROHIBITED
 264 #endif
 265
 266 #ifndef __IOS_AVAILABLE
 267   #define __IOS_AVAILABLE(_vers)
 268 #endif
 269
 270 #ifndef __IOS_DEPRECATED
 271   #define __IOS_DEPRECATED(_start, _dep, _msg)
 272 #endif
 273
 274
 275 /* for use marking APIs available info for tvOS */
 276 #if defined(__has_feature)
 277   #if __has_feature(attribute_availability_tvos)
 278     #define __TVOS_UNAVAILABLE                    __OS_AVAILABILITY(tvos,unavailable)
 279     #define __TVOS_PROHIBITED                     __OS_AVAILABILITY(tvos,unavailable)
 280     #define __TVOS_AVAILABLE(_vers)               __OS_AVAILABILITY(tvos,introduced=_vers)
 281     #define __TVOS_DEPRECATED(_start, _dep, _msg) __TVOS_AVAILABLE(_start) __OS_AVAILABILITY_MSG(tvos,deprecated=_dep,_msg)
 282   #endif
 283 #endif
 284
 285 #ifndef __TVOS_UNAVAILABLE
 286   #define __TVOS_UNAVAILABLE
 287 #endif
 288
 289 #ifndef __TVOS_PROHIBITED
 290   #define __TVOS_PROHIBITED
 291 #endif
 292
 293 #ifndef __TVOS_AVAILABLE
 294   #define __TVOS_AVAILABLE(_vers)
 295 #endif
 296
 297 #ifndef __TVOS_DEPRECATED
 298   #define __TVOS_DEPRECATED(_start, _dep, _msg)
 299 #endif
 300
 301
 302 /* for use marking APIs available info for Watch OS */
 303 #if defined(__has_feature)
 304   #if __has_feature(attribute_availability_watchos)
 305     #define __WATCHOS_UNAVAILABLE                    __OS_AVAILABILITY(watchos,unavailable)
 306     #define __WATCHOS_PROHIBITED                     __OS_AVAILABILITY(watchos,unavailable)
 307     #define __WATCHOS_AVAILABLE(_vers)               __OS_AVAILABILITY(watchos,introduced=_vers)
 308     #define __WATCHOS_DEPRECATED(_start, _dep, _msg) __WATCHOS_AVAILABLE(_start) __OS_AVAILABILITY_MSG(watchos,deprecated=_dep,_msg)
 309   #endif
 310 #endif
 311
 312 #ifndef __WATCHOS_UNAVAILABLE
 313   #define __WATCHOS_UNAVAILABLE
 314 #endif
 315
 316 #ifndef __WATCHOS_PROHIBITED
 317   #define __WATCHOS_PROHIBITED
 318 #endif
 319
 320 #ifndef __WATCHOS_AVAILABLE
 321   #define __WATCHOS_AVAILABLE(_vers)
 322 #endif
 323
 324 #ifndef __WATCHOS_DEPRECATED
 325   #define __WATCHOS_DEPRECATED(_start, _dep, _msg)
 326 #endif
 327
 328 #if __has_include(<AvailabilityProhibitedInternal.h>)
 329   #include <AvailabilityProhibitedInternal.h>
 330 #endif
 331
 332 #endif /* __AVAILABILITY__ */