lib/sys_select.in.h

   1 /* Substitute for <sys/select.h>.
   2    Copyright (C) 2007-2024 Free Software Foundation, Inc.
   3
   4    This file is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU Lesser General Public License as
   6    published by the Free Software Foundation; either version 2.1 of the
   7    License, or (at your option) any later version.
   8
   9    This file is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 # if __GNUC__ >= 3
  18 @PRAGMA_SYSTEM_HEADER@
  19 # endif
  20 @PRAGMA_COLUMNS@
  21
  22 /* This file uses #include_next of a system file that defines time_t.
  23    For the 'year2038' module to work right, <config.h> needs to have been
  24    included before.  */
  25 #if !_GL_CONFIG_H_INCLUDED
  26  #error "Please include config.h first."
  27 #endif
  28
  29 /* On OSF/1 and Solaris 2.6, <sys/types.h> and <sys/time.h>
  30    both include <sys/select.h>.
  31    On Cygwin and OpenBSD, <sys/time.h> includes <sys/select.h>.
  32    Simply delegate to the system's header in this case.  */
  33 #if (@HAVE_SYS_SELECT_H@                                                \
  34      && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H             \
  35      && ((defined __osf__ && defined _SYS_TYPES_H_                      \
  36           && defined _OSF_SOURCE)                                       \
  37          || (defined __sun && defined _SYS_TYPES_H                      \
  38              && (! (defined _XOPEN_SOURCE || defined _POSIX_C_SOURCE)   \
  39                  || defined __EXTENSIONS__))))
  40
  41 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
  42 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  43
  44 #elif (@HAVE_SYS_SELECT_H@                                              \
  45        && (defined _CYGWIN_SYS_TIME_H                                   \
  46            || (!defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H       \
  47                && ((defined __osf__ && defined _SYS_TIME_H_             \
  48                     && defined _OSF_SOURCE)                             \
  49                    || (defined __OpenBSD__ && defined _SYS_TIME_H_)     \
  50                    || (defined __sun && defined _SYS_TIME_H             \
  51                        && (! (defined _XOPEN_SOURCE                     \
  52                               || defined _POSIX_C_SOURCE)               \
  53                            || defined __EXTENSIONS__))))))
  54
  55 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
  56 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  57
  58 /* On IRIX 6.5, <sys/timespec.h> includes <sys/types.h>, which includes
  59    <sys/bsd_types.h>, which includes <sys/select.h>.  At this point we cannot
  60    include <signal.h>, because that includes <internal/signal_core.h>, which
  61    gives a syntax error because <sys/timespec.h> has not been completely
  62    processed.  Simply delegate to the system's header in this case.  */
  63 #elif @HAVE_SYS_SELECT_H@ && defined __sgi && (defined _SYS_BSD_TYPES_H && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H)
  64
  65 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H
  66 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  67
  68 /* On OpenBSD 5.0, <pthread.h> includes <sys/types.h>, which includes
  69    <sys/select.h>.  At this point we cannot include <signal.h>, because that
  70    includes gnulib's pthread.h override, which gives a syntax error because
  71    /usr/include/pthread.h has not been completely processed.  Simply delegate
  72    to the system's header in this case.  */
  73 #elif @HAVE_SYS_SELECT_H@ && defined __OpenBSD__ && (defined _PTHREAD_H_ && !defined PTHREAD_MUTEX_INITIALIZER)
  74
  75 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  76
  77 #else
  78
  79 #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
  80
  81 /* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*.  */
  82 #if !_GL_CONFIG_H_INCLUDED
  83  #error "Please include config.h first."
  84 #endif
  85
  86 /* On many platforms, <sys/select.h> assumes prior inclusion of
  87    <sys/types.h>.  Also, mingw defines sigset_t there, instead of
  88    in <signal.h> where it belongs.  */
  89 #include <sys/types.h>
  90
  91 #if @HAVE_SYS_SELECT_H@
  92
  93 /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
  94    of 'struct timeval', and no definition of this type.
  95    Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
  96    in <sys/time.h>.
  97    But avoid namespace pollution on glibc systems, a circular include
  98    <sys/select.h> -> <sys/time.h> -> <sys/select.h> on FreeBSD 13.1, and
  99    "unknown type name" problems on Cygwin.  */
 100 # if !(defined __GLIBC__ || defined __FreeBSD__ || defined __CYGWIN__)
 101 #  include <sys/time.h>
 102 # endif
 103
 104 /* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
 105    that relies on memset(), but without including <string.h>.
 106    But in any case avoid namespace pollution on glibc systems.  */
 107 # if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
 108      && ! defined __GLIBC__
 109 #  include <string.h>
 110 # endif
 111
 112 /* The include_next requires a split double-inclusion guard.  */
 113 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
 114
 115 #endif
 116
 117 /* Get definition of 'sigset_t'.
 118    But avoid namespace pollution on glibc systems and "unknown type
 119    name" problems on Cygwin.
 120    On OS/2 kLIBC, sigset_t is defined in <sys/select.h>, too. In addition,
 121    if <sys/param.h> is included, <types.h> -> <sys/types.h> -> <sys/select.h>
 122    are included. Then <signal.h> -> <pthread.h> are included by GNULIB. By the
 123    way, <pthread.h> requires PAGE_SIZE defined in <sys/param.h>. However,
 124    <sys/param.h> has not been processed, yet. As a result, 'PAGE_SIZE'
 125    undeclared error occurs in <pthread.h>.
 126    Do this after the include_next (for the sake of OpenBSD 5.0) but before
 127    the split double-inclusion guard (for the sake of Solaris).  */
 128 #if !((defined __GLIBC__ || defined __CYGWIN__ || defined __KLIBC__) \
 129       && !defined __UCLIBC__)
 130 # include <signal.h>
 131 #endif
 132
 133 #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
 134 #define _@GUARD_PREFIX@_SYS_SELECT_H
 135
 136 #if !@HAVE_SYS_SELECT_H@
 137 /* A platform that lacks <sys/select.h>.  */
 138 /* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
 139    on most platforms.  */
 140 # include <sys/time.h>
 141 /* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
 142    that relies on memset(), but without including <string.h>.  */
 143 # if defined __hpux
 144 #  include <string.h>
 145 # endif
 146 /* On native Windows platforms:
 147    Get the 'fd_set' type.
 148    Get the close() declaration before we override it.  */
 149 # if @HAVE_WINSOCK2_H@
 150 #  if !defined _GL_INCLUDING_WINSOCK2_H
 151 #   define _GL_INCLUDING_WINSOCK2_H
 152 #   include <winsock2.h>
 153 #   undef _GL_INCLUDING_WINSOCK2_H
 154 #  endif
 155 #  include <io.h>
 156 # endif
 157 #endif
 158
 159 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
 160
 161 /* The definition of _GL_WARN_ON_USE is copied here.  */
 162
 163
 164 /* Fix some definitions from <winsock2.h>.  */
 165
 166 #if @HAVE_WINSOCK2_H@
 167
 168 # if !GNULIB_defined_rpl_fd_isset
 169
 170 /* Re-define FD_ISSET to avoid a WSA call while we are not using
 171    network sockets.  */
 172 static int
 173 rpl_fd_isset (SOCKET fd, fd_set * set)
 174 {
 175   u_int i;
 176   if (set == NULL)
 177     return 0;
 178
 179   for (i = 0; i < set->fd_count; i++)
 180     if (set->fd_array[i] == fd)
 181       return 1;
 182
 183   return 0;
 184 }
 185
 186 #  define GNULIB_defined_rpl_fd_isset 1
 187 # endif
 188
 189 # undef FD_ISSET
 190 # define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
 191
 192 #endif
 193
 194 /* Hide some function declarations from <winsock2.h>.  */
 195
 196 #if @HAVE_WINSOCK2_H@
 197 # if !defined _@GUARD_PREFIX@_UNISTD_H
 198 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 199 #   undef close
 200 #   define close close_used_without_including_unistd_h
 201 #  elif !defined __clang__
 202     _GL_WARN_ON_USE (close,
 203                      "close() used without including <unistd.h>");
 204 #  endif
 205 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 206 #   undef gethostname
 207 #   define gethostname gethostname_used_without_including_unistd_h
 208 #  elif !defined __clang__
 209     _GL_WARN_ON_USE (gethostname,
 210                      "gethostname() used without including <unistd.h>");
 211 #  endif
 212 # endif
 213 # if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
 214 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 215 #   undef socket
 216 #   define socket              socket_used_without_including_sys_socket_h
 217 #   undef connect
 218 #   define connect             connect_used_without_including_sys_socket_h
 219 #   undef accept
 220 #   define accept              accept_used_without_including_sys_socket_h
 221 #   undef bind
 222 #   define bind                bind_used_without_including_sys_socket_h
 223 #   undef getpeername
 224 #   define getpeername         getpeername_used_without_including_sys_socket_h
 225 #   undef getsockname
 226 #   define getsockname         getsockname_used_without_including_sys_socket_h
 227 #   undef getsockopt
 228 #   define getsockopt          getsockopt_used_without_including_sys_socket_h
 229 #   undef listen
 230 #   define listen              listen_used_without_including_sys_socket_h
 231 #   undef recv
 232 #   define recv                recv_used_without_including_sys_socket_h
 233 #   undef send
 234 #   define send                send_used_without_including_sys_socket_h
 235 #   undef recvfrom
 236 #   define recvfrom            recvfrom_used_without_including_sys_socket_h
 237 #   undef sendto
 238 #   define sendto              sendto_used_without_including_sys_socket_h
 239 #   undef setsockopt
 240 #   define setsockopt          setsockopt_used_without_including_sys_socket_h
 241 #   undef shutdown
 242 #   define shutdown            shutdown_used_without_including_sys_socket_h
 243 #  elif !defined __clang__
 244     _GL_WARN_ON_USE (socket,
 245                      "socket() used without including <sys/socket.h>");
 246     _GL_WARN_ON_USE (connect,
 247                      "connect() used without including <sys/socket.h>");
 248     _GL_WARN_ON_USE (accept,
 249                      "accept() used without including <sys/socket.h>");
 250     _GL_WARN_ON_USE (bind,
 251                      "bind() used without including <sys/socket.h>");
 252     _GL_WARN_ON_USE (getpeername,
 253                      "getpeername() used without including <sys/socket.h>");
 254     _GL_WARN_ON_USE (getsockname,
 255                      "getsockname() used without including <sys/socket.h>");
 256     _GL_WARN_ON_USE (getsockopt,
 257                      "getsockopt() used without including <sys/socket.h>");
 258     _GL_WARN_ON_USE (listen,
 259                      "listen() used without including <sys/socket.h>");
 260     _GL_WARN_ON_USE (recv,
 261                      "recv() used without including <sys/socket.h>");
 262     _GL_WARN_ON_USE (send,
 263                      "send() used without including <sys/socket.h>");
 264     _GL_WARN_ON_USE (recvfrom,
 265                      "recvfrom() used without including <sys/socket.h>");
 266     _GL_WARN_ON_USE (sendto,
 267                      "sendto() used without including <sys/socket.h>");
 268     _GL_WARN_ON_USE (setsockopt,
 269                      "setsockopt() used without including <sys/socket.h>");
 270     _GL_WARN_ON_USE (shutdown,
 271                      "shutdown() used without including <sys/socket.h>");
 272 #  endif
 273 # endif
 274 #endif
 275
 276
 277 #if @GNULIB_PSELECT@
 278 # if @REPLACE_PSELECT@
 279 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 280 #   undef pselect
 281 #   define pselect rpl_pselect
 282 #  endif
 283 _GL_FUNCDECL_RPL (pselect, int,
 284                   (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
 285                    struct timespec const *restrict, const sigset_t *restrict));
 286 _GL_CXXALIAS_RPL (pselect, int,
 287                   (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
 288                    struct timespec const *restrict, const sigset_t *restrict));
 289 # else
 290 #  if !@HAVE_PSELECT@
 291 _GL_FUNCDECL_SYS (pselect, int,
 292                   (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
 293                    struct timespec const *restrict, const sigset_t *restrict));
 294 #  endif
 295 /* Need to cast, because on AIX 7, the second, third, fourth argument may be
 296                         void *restrict,   void *restrict,   void *restrict.  */
 297 _GL_CXXALIAS_SYS_CAST (pselect, int,
 298                        (int,
 299                         fd_set *restrict, fd_set *restrict, fd_set *restrict,
 300                         struct timespec const *restrict,
 301                         const sigset_t *restrict));
 302 # endif
 303 # if __GLIBC__ >= 2
 304 _GL_CXXALIASWARN (pselect);
 305 # endif
 306 #elif defined GNULIB_POSIXCHECK
 307 # undef pselect
 308 # if HAVE_RAW_DECL_PSELECT
 309 _GL_WARN_ON_USE (pselect, "pselect is not portable - "
 310                  "use gnulib module pselect for portability");
 311 # endif
 312 #endif
 313
 314 #if @GNULIB_SELECT@
 315 # if @REPLACE_SELECT@
 316 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
 317 #   undef select
 318 #   define select rpl_select
 319 #  endif
 320 _GL_FUNCDECL_RPL (select, int,
 321                   (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
 322                    struct timeval *restrict));
 323 _GL_CXXALIAS_RPL (select, int,
 324                   (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
 325                    timeval *restrict));
 326 # else
 327 _GL_CXXALIAS_SYS (select, int,
 328                   (int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
 329                    timeval *restrict));
 330 # endif
 331 _GL_CXXALIASWARN (select);
 332 #elif @HAVE_WINSOCK2_H@
 333 # undef select
 334 # define select select_used_without_requesting_gnulib_module_select
 335 #elif defined GNULIB_POSIXCHECK
 336 # undef select
 337 # if HAVE_RAW_DECL_SELECT
 338 _GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
 339                  "use gnulib module select for portability");
 340 # endif
 341 #endif
 342
 343
 344 #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
 345 #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
 346 #endif /* OSF/1 */