sdk/include/crt/stddef.h

   1 /**
   2  * This file has no copyright assigned and is placed in the Public Domain.
   3  * This file is part of the w64 mingw-runtime package.
   4  * No warranty is given; refer to the file DISCLAIMER within this package.
   5  */
   6
   7 #include <crtdefs.h>
   8
   9 #ifndef _INC_STDDEF
  10 #define _INC_STDDEF
  11
  12 #ifdef __cplusplus
  13 extern "C" {
  14 #endif
  15
  16 #include <errno.h>
  17
  18   _CRTIMP extern unsigned long __cdecl __threadid(void);
  19 #define _threadid (__threadid())
  20   _CRTIMP extern uintptr_t __cdecl __threadhandle(void);
  21
  22 #ifdef __cplusplus
  23 }
  24 #endif
  25
  26 #endif
  27
  28 /*
  29  * ISO C Standard:  7.17  Common definitions  <stddef.h>
  30  */
  31 #if (!defined(_STDDEF_H) && !defined(_STDDEF_H_) && !defined(_ANSI_STDDEF_H) \
  32      && !defined(__STDDEF_H__)) \
  33     || defined(__need_wchar_t) || defined(__need_size_t) \
  34     || defined(__need_ptrdiff_t) || defined(__need_NULL) \
  35     || defined(__need_wint_t)
  36
  37 /* Any one of these symbols __need_* means that GNU libc
  38    wants us just to define one data type.  So don't define
  39    the symbols that indicate this file's entire job has been done.  */
  40 #if (!defined(__need_wchar_t) && !defined(__need_size_t)        \
  41      && !defined(__need_ptrdiff_t) && !defined(__need_NULL)     \
  42      && !defined(__need_wint_t))
  43 #define _STDDEF_H
  44 #define _STDDEF_H_
  45 /* snaroff@next.com says the NeXT needs this.  */
  46 #define _ANSI_STDDEF_H
  47 /* Irix 5.1 needs this.  */
  48 #define __STDDEF_H__
  49 #endif
  50
  51 #ifndef __sys_stdtypes_h
  52 /* In 4.3bsd-net2, machine/ansi.h defines these symbols, which are
  53    defined if the corresponding type is *not* defined.
  54    FreeBSD-2.1 defines _MACHINE_ANSI_H_ instead of _ANSI_H_ */
  55 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_)
  56 #if !defined(_SIZE_T_) && !defined(_BSD_SIZE_T_)
  57 #define _SIZE_T
  58 #endif
  59 #if !defined(_PTRDIFF_T_) && !defined(_BSD_PTRDIFF_T_)
  60 #define _PTRDIFF_T
  61 #endif
  62 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
  63    instead of _WCHAR_T_. */
  64 #if !defined(_WCHAR_T_) && !defined(_BSD_WCHAR_T_)
  65 #ifndef _BSD_WCHAR_T_
  66 #define _WCHAR_T
  67 #endif
  68 #endif
  69 /* Undef _FOO_T_ if we are supposed to define foo_t.  */
  70 #if defined (__need_ptrdiff_t) || defined (_STDDEF_H_)
  71 #undef _PTRDIFF_T_
  72 #undef _BSD_PTRDIFF_T_
  73 #endif
  74 #if defined (__need_size_t) || defined (_STDDEF_H_)
  75 #undef _SIZE_T_
  76 #undef _BSD_SIZE_T_
  77 #endif
  78 #if defined (__need_wchar_t) || defined (_STDDEF_H_)
  79 #undef _WCHAR_T_
  80 #undef _BSD_WCHAR_T_
  81 #endif
  82 #endif /* defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_) */
  83
  84 /* Sequent's header files use _PTRDIFF_T_ in some conflicting way.
  85    Just ignore it.  */
  86 #if defined (__sequent__) && defined (_PTRDIFF_T_)
  87 #undef _PTRDIFF_T_
  88 #endif
  89
  90 /* On VxWorks, <type/vxTypesBase.h> may have defined macros like
  91    _TYPE_size_t which will typedef size_t.  fixincludes patched the
  92    vxTypesBase.h so that this macro is only defined if _GCC_SIZE_T is
  93    not defined, and so that defining this macro defines _GCC_SIZE_T.
  94    If we find that the macros are still defined at this point, we must
  95    invoke them so that the type is defined as expected.  */
  96 #if defined (_TYPE_ptrdiff_t) && (defined (__need_ptrdiff_t) || defined (_STDDEF_H_))
  97 _TYPE_ptrdiff_t;
  98 #undef _TYPE_ptrdiff_t
  99 #endif
 100 #if defined (_TYPE_size_t) && (defined (__need_size_t) || defined (_STDDEF_H_))
 101 _TYPE_size_t;
 102 #undef _TYPE_size_t
 103 #endif
 104 #if defined (_TYPE_wchar_t) && (defined (__need_wchar_t) || defined (_STDDEF_H_))
 105 _TYPE_wchar_t;
 106 #undef _TYPE_wchar_t
 107 #endif
 108
 109 /* In case nobody has defined these types, but we aren't running under
 110    GCC 2.00, make sure that __PTRDIFF_TYPE__, __SIZE_TYPE__, and
 111    __WCHAR_TYPE__ have reasonable values.  This can happen if the
 112    parts of GCC is compiled by an older compiler, that actually
 113    include gstddef.h, such as collect2.  */
 114
 115 /* Signed type of difference of two pointers.  */
 116
 117 /* Define this type if we are doing the whole job,
 118    or if we want this type in particular.  */
 119 #if defined (_STDDEF_H) || defined (__need_ptrdiff_t)
 120 #ifndef _PTRDIFF_T      /* in case <sys/types.h> has defined it. */
 121 #ifndef _T_PTRDIFF_
 122 #ifndef _T_PTRDIFF
 123 #ifndef __PTRDIFF_T
 124 #ifndef _PTRDIFF_T_
 125 #ifndef _BSD_PTRDIFF_T_
 126 #ifndef ___int_ptrdiff_t_h
 127 #ifndef _GCC_PTRDIFF_T
 128 #define _PTRDIFF_T
 129 #define _T_PTRDIFF_
 130 #define _T_PTRDIFF
 131 #define __PTRDIFF_T
 132 #define _PTRDIFF_T_
 133 #define _BSD_PTRDIFF_T_
 134 #define ___int_ptrdiff_t_h
 135 #define _GCC_PTRDIFF_T
 136 #ifndef __PTRDIFF_TYPE__
 137 #ifdef _WIN64
 138 #define __PTRDIFF_TYPE__ long long int
 139 #else
 140 #define __PTRDIFF_TYPE__ long int
 141 #endif
 142 #endif
 143 #ifndef _PTRDIFF_T_DEFINED
 144 #define _PTRDIFF_T_DEFINED
 145 __MINGW_EXTENSION typedef __PTRDIFF_TYPE__ ptrdiff_t;
 146 #endif
 147 #endif /* _GCC_PTRDIFF_T */
 148 #endif /* ___int_ptrdiff_t_h */
 149 #endif /* _BSD_PTRDIFF_T_ */
 150 #endif /* _PTRDIFF_T_ */
 151 #endif /* __PTRDIFF_T */
 152 #endif /* _T_PTRDIFF */
 153 #endif /* _T_PTRDIFF_ */
 154 #endif /* _PTRDIFF_T */
 155
 156 /* If this symbol has done its job, get rid of it.  */
 157 #undef  __need_ptrdiff_t
 158
 159 #endif /* _STDDEF_H or __need_ptrdiff_t.  */
 160
 161 /* Unsigned type of `sizeof' something.  */
 162
 163 /* Define this type if we are doing the whole job,
 164    or if we want this type in particular.  */
 165 #if defined (_STDDEF_H) || defined (__need_size_t)
 166 #ifndef __size_t__      /* BeOS */
 167 #ifndef __SIZE_T__      /* Cray Unicos/Mk */
 168 #ifndef _SIZE_T /* in case <sys/types.h> has defined it. */
 169 #ifndef _SYS_SIZE_T_H
 170 #ifndef _T_SIZE_
 171 #ifndef _T_SIZE
 172 #ifndef __SIZE_T
 173 #ifndef _SIZE_T_
 174 #ifndef _BSD_SIZE_T_
 175 #ifndef _SIZE_T_DEFINED_
 176 #ifndef _SIZE_T_DEFINED
 177 #ifndef _BSD_SIZE_T_DEFINED_    /* Darwin */
 178 #ifndef _SIZE_T_DECLARED        /* FreeBSD 5 */
 179 #ifndef ___int_size_t_h
 180 #ifndef _GCC_SIZE_T
 181 #ifndef _SIZET_
 182 #ifndef __size_t
 183 #define __size_t__      /* BeOS */
 184 #define __SIZE_T__      /* Cray Unicos/Mk */
 185 #define _SIZE_T
 186 #define _SYS_SIZE_T_H
 187 #define _T_SIZE_
 188 #define _T_SIZE
 189 #define __SIZE_T
 190 #define _SIZE_T_
 191 #define _BSD_SIZE_T_
 192 #define _SIZE_T_DEFINED_
 193 #define _SIZE_T_DEFINED
 194 #define _BSD_SIZE_T_DEFINED_    /* Darwin */
 195 #define _SIZE_T_DECLARED        /* FreeBSD 5 */
 196 #define ___int_size_t_h
 197 #define _GCC_SIZE_T
 198 #define _SIZET_
 199 #if defined (__FreeBSD__) && (__FreeBSD__ >= 5)
 200 /* __size_t is a typedef on FreeBSD 5!, must not trash it. */
 201 #else
 202 #define __size_t
 203 #endif
 204 #ifndef __SIZE_TYPE__
 205 #ifdef _WIN64
 206 #define __SIZE_TYPE__ long long unsigned int
 207 #else
 208 #define __SIZE_TYPE__ long unsigned int
 209 #endif
 210 #endif
 211 #if !(defined (__GNUG__) && defined (size_t))
 212 __MINGW_EXTENSION typedef __SIZE_TYPE__ size_t;
 213 #ifdef __BEOS__
 214 typedef long ssize_t;
 215 #endif /* __BEOS__ */
 216 #endif /* !(defined (__GNUG__) && defined (size_t)) */
 217 #endif /* __size_t */
 218 #endif /* _SIZET_ */
 219 #endif /* _GCC_SIZE_T */
 220 #endif /* ___int_size_t_h */
 221 #endif /* _SIZE_T_DECLARED */
 222 #endif /* _BSD_SIZE_T_DEFINED_ */
 223 #endif /* _SIZE_T_DEFINED */
 224 #endif /* _SIZE_T_DEFINED_ */
 225 #endif /* _BSD_SIZE_T_ */
 226 #endif /* _SIZE_T_ */
 227 #endif /* __SIZE_T */
 228 #endif /* _T_SIZE */
 229 #endif /* _T_SIZE_ */
 230 #endif /* _SYS_SIZE_T_H */
 231 #endif /* _SIZE_T */
 232 #endif /* __SIZE_T__ */
 233 #endif /* __size_t__ */
 234 #undef  __need_size_t
 235 #endif /* _STDDEF_H or __need_size_t.  */
 236
 237
 238 /* Wide character type.
 239    Locale-writers should change this as necessary to
 240    be big enough to hold unique values not between 0 and 127,
 241    and not (wchar_t) -1, for each defined multibyte character.  */
 242
 243 /* Define this type if we are doing the whole job,
 244    or if we want this type in particular.  */
 245 #if defined (_STDDEF_H) || defined (__need_wchar_t)
 246 #ifndef __wchar_t__     /* BeOS */
 247 #ifndef __WCHAR_T__     /* Cray Unicos/Mk */
 248 #ifndef _WCHAR_T
 249 #ifndef _T_WCHAR_
 250 #ifndef _T_WCHAR
 251 #ifndef __WCHAR_T
 252 #ifndef _WCHAR_T_
 253 #ifndef _BSD_WCHAR_T_
 254 #ifndef _BSD_WCHAR_T_DEFINED_    /* Darwin */
 255 #ifndef _BSD_RUNE_T_DEFINED_    /* Darwin */
 256 #ifndef _WCHAR_T_DECLARED /* FreeBSD 5 */
 257 #ifndef _WCHAR_T_DEFINED_
 258 #ifndef _WCHAR_T_DEFINED
 259 #ifndef _WCHAR_T_H
 260 #ifndef ___int_wchar_t_h
 261 #ifndef __INT_WCHAR_T_H
 262 #ifndef _GCC_WCHAR_T
 263 #define __wchar_t__     /* BeOS */
 264 #define __WCHAR_T__     /* Cray Unicos/Mk */
 265 #define _WCHAR_T
 266 #define _T_WCHAR_
 267 #define _T_WCHAR
 268 #define __WCHAR_T
 269 #define _WCHAR_T_
 270 #define _BSD_WCHAR_T_
 271 #define _WCHAR_T_DEFINED_
 272 #define _WCHAR_T_DEFINED
 273 #define _WCHAR_T_H
 274 #define ___int_wchar_t_h
 275 #define __INT_WCHAR_T_H
 276 #define _GCC_WCHAR_T
 277 #define _WCHAR_T_DECLARED
 278
 279 /* On BSD/386 1.1, at least, machine/ansi.h defines _BSD_WCHAR_T_
 280    instead of _WCHAR_T_, and _BSD_RUNE_T_ (which, unlike the other
 281    symbols in the _FOO_T_ family, stays defined even after its
 282    corresponding type is defined).  If we define wchar_t, then we
 283    must undef _WCHAR_T_; for BSD/386 1.1 (and perhaps others), if
 284    we undef _WCHAR_T_, then we must also define rune_t, since
 285    headers like runetype.h assume that if machine/ansi.h is included,
 286    and _BSD_WCHAR_T_ is not defined, then rune_t is available.
 287    machine/ansi.h says, "Note that _WCHAR_T_ and _RUNE_T_ must be of
 288    the same type." */
 289 #ifdef _BSD_WCHAR_T_
 290 #undef _BSD_WCHAR_T_
 291 #ifdef _BSD_RUNE_T_
 292 #if !defined (_ANSI_SOURCE) && !defined (_POSIX_SOURCE)
 293 typedef _BSD_RUNE_T_ rune_t;
 294 #define _BSD_WCHAR_T_DEFINED_
 295 #define _BSD_RUNE_T_DEFINED_    /* Darwin */
 296 #if defined (__FreeBSD__) && (__FreeBSD__ < 5)
 297 /* Why is this file so hard to maintain properly?  In contrast to
 298    the comment above regarding BSD/386 1.1, on FreeBSD for as long
 299    as the symbol has existed, _BSD_RUNE_T_ must not stay defined or
 300    redundant typedefs will occur when stdlib.h is included after this file. */
 301 #undef _BSD_RUNE_T_
 302 #endif
 303 #endif
 304 #endif
 305 #endif
 306
 307 #ifndef __WCHAR_TYPE__
 308 #define __WCHAR_TYPE__ unsigned short
 309 #endif
 310 #ifndef __cplusplus
 311 typedef __WCHAR_TYPE__ wchar_t;
 312 #endif
 313 #endif
 314 #endif
 315 #endif
 316 #endif
 317 #endif
 318 #endif
 319 #endif /* _WCHAR_T_DECLARED */
 320 #endif /* _BSD_RUNE_T_DEFINED_ */
 321 #endif
 322 #endif
 323 #endif
 324 #endif
 325 #endif
 326 #endif
 327 #endif
 328 #endif /* __WCHAR_T__ */
 329 #endif /* __wchar_t__ */
 330 #undef  __need_wchar_t
 331 #endif /* _STDDEF_H or __need_wchar_t.  */
 332
 333 /*  In 4.3bsd-net2, leave these undefined to indicate that size_t, etc.
 334     are already defined.  */
 335 /*  BSD/OS 3.1 and FreeBSD [23].x require the MACHINE_ANSI_H check here.  */
 336 #if defined(_ANSI_H_) || defined(_MACHINE_ANSI_H_)
 337 /*  The references to _GCC_PTRDIFF_T_, _GCC_SIZE_T_, and _GCC_WCHAR_T_
 338     are probably typos and should be removed before 2.8 is released.  */
 339 #ifdef _GCC_PTRDIFF_T_
 340 #undef _PTRDIFF_T_
 341 #undef _BSD_PTRDIFF_T_
 342 #endif
 343 #ifdef _GCC_SIZE_T_
 344 #undef _SIZE_T_
 345 #undef _BSD_SIZE_T_
 346 #endif
 347 #ifdef _GCC_WCHAR_T_
 348 #undef _WCHAR_T_
 349 #undef _BSD_WCHAR_T_
 350 #endif
 351 /*  The following ones are the real ones.  */
 352 #ifdef _GCC_PTRDIFF_T
 353 #undef _PTRDIFF_T_
 354 #undef _BSD_PTRDIFF_T_
 355 #endif
 356 #ifdef _GCC_SIZE_T
 357 #undef _SIZE_T_
 358 #undef _BSD_SIZE_T_
 359 #endif
 360 #ifdef _GCC_WCHAR_T
 361 #undef _WCHAR_T_
 362 #undef _BSD_WCHAR_T_
 363 #endif
 364 #endif /* _ANSI_H_ || _MACHINE_ANSI_H_ */
 365
 366 #endif /* __sys_stdtypes_h */
 367
 368 /* A null pointer constant.  */
 369 #ifndef NULL
 370 #ifdef __cplusplus
 371 #define NULL 0
 372 #else
 373 #define NULL ((void*)0)
 374 #endif
 375 #endif
 376
 377 #ifndef offsetof
 378
 379 /* Offset of member MEMBER in a struct of type TYPE. */
 380 #if defined(__GNUC__)
 381 #define offsetof(TYPE, MEMBER) __builtin_offsetof (TYPE, MEMBER)
 382 #else
 383 #define offsetof(TYPE, MEMBER) ((size_t)&(((TYPE *)0)->MEMBER))
 384 #endif
 385
 386 #endif /* !offsetof */
 387
 388 #endif /* !_STDDEF_H && !_STDDEF_H_ && !_ANSI_STDDEF_H && !__STDDEF_H__
 389           || __need_XXX was not defined before */