lib/poll.in.h

   1 /* Header for poll(2) emulation
   2    Contributed by Paolo Bonzini.
   3
   4    Copyright 2001-2003, 2007, 2009-2018 Free Software Foundation, Inc.
   5
   6    This file is part of gnulib.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2, or (at your option)
  11    any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License along
  19    with this program; if not, see <https://www.gnu.org/licenses/>.  */
  20
  21 #ifndef _@GUARD_PREFIX@_POLL_H
  22
  23 #if __GNUC__ >= 3
  24 @PRAGMA_SYSTEM_HEADER@
  25 #endif
  26 @PRAGMA_COLUMNS@
  27
  28 /* The include_next requires a split double-inclusion guard.  */
  29 #if @HAVE_POLL_H@
  30 # @INCLUDE_NEXT@ @NEXT_POLL_H@
  31 #endif
  32
  33 #ifndef _@GUARD_PREFIX@_POLL_H
  34 #define _@GUARD_PREFIX@_POLL_H
  35
  36
  37 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
  38
  39 /* The definition of _GL_WARN_ON_USE is copied here.  */
  40
  41
  42 #if !@HAVE_POLL_H@
  43
  44 /* fake a poll(2) environment */
  45 # define POLLIN      0x0001      /* any readable data available   */
  46 # define POLLPRI     0x0002      /* OOB/Urgent readable data      */
  47 # define POLLOUT     0x0004      /* file descriptor is writable   */
  48 # define POLLERR     0x0008      /* some poll error occurred      */
  49 # define POLLHUP     0x0010      /* file descriptor was "hung up" */
  50 # define POLLNVAL    0x0020      /* requested events "invalid"    */
  51 # define POLLRDNORM  0x0040
  52 # define POLLRDBAND  0x0080
  53 # define POLLWRNORM  0x0100
  54 # define POLLWRBAND  0x0200
  55
  56 # if !GNULIB_defined_poll_types
  57
  58 struct pollfd
  59 {
  60   int fd;                       /* which file descriptor to poll */
  61   short events;                 /* events we are interested in   */
  62   short revents;                /* events found on return        */
  63 };
  64
  65 typedef unsigned long nfds_t;
  66
  67 #  define GNULIB_defined_poll_types 1
  68 # endif
  69
  70 /* Define INFTIM only if doing so conforms to POSIX.  */
  71 # if !defined (_POSIX_C_SOURCE) && !defined (_XOPEN_SOURCE)
  72 #  define INFTIM (-1)
  73 # endif
  74
  75 #endif
  76
  77
  78 #if @GNULIB_POLL@
  79 # if @REPLACE_POLL@
  80 #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
  81 #   undef poll
  82 #   define poll rpl_poll
  83 #  endif
  84 _GL_FUNCDECL_RPL (poll, int, (struct pollfd *pfd, nfds_t nfd, int timeout));
  85 _GL_CXXALIAS_RPL (poll, int, (struct pollfd *pfd, nfds_t nfd, int timeout));
  86 # else
  87 #  if !@HAVE_POLL@
  88 _GL_FUNCDECL_SYS (poll, int, (struct pollfd *pfd, nfds_t nfd, int timeout));
  89 #  endif
  90 _GL_CXXALIAS_SYS (poll, int, (struct pollfd *pfd, nfds_t nfd, int timeout));
  91 # endif
  92 _GL_CXXALIASWARN (poll);
  93 #elif defined GNULIB_POSIXCHECK
  94 # undef poll
  95 # if HAVE_RAW_DECL_POLL
  96 _GL_WARN_ON_USE (poll, "poll is unportable - "
  97                  "use gnulib module poll for portability");
  98 # endif
  99 #endif
 100
 101
 102 #endif /* _@GUARD_PREFIX@_POLL_H */
 103 #endif /* _@GUARD_PREFIX@_POLL_H */