gl/sys_select.in.h

   1 /* Substitute for <sys/select.h>.
   2    Copyright (C) 2007-2009 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3, or (at your option)
   7    any later version.
   8
   9    This program 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 General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  17
  18 # if __GNUC__ >= 3
  19 @PRAGMA_SYSTEM_HEADER@
  20 # endif
  21
  22 /* On OSF/1, <sys/types.h> and <sys/time.h> include <sys/select.h>.
  23    Simply delegate to the system's header in this case.  */
  24 #if @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TYPES_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H) && defined _OSF_SOURCE
  25
  26 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
  27 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  28
  29 #elif @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TIME_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H) && defined _OSF_SOURCE
  30
  31 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
  32 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  33
  34 #else
  35
  36 #ifndef _GL_SYS_SELECT_H
  37
  38 #if @HAVE_SYS_SELECT_H@
  39
  40 /* On many platforms, <sys/select.h> assumes prior inclusion of
  41    <sys/types.h>.  */
  42 # include <sys/types.h>
  43
  44 /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
  45    of 'struct timeval', and no definition of this type.  */
  46 # include <sys/time.h>
  47
  48 /* On Solaris 10, <sys/select.h> provides an FD_ZERO implementation
  49    that relies on memset(), but without including <string.h>.  */
  50 # include <string.h>
  51
  52 /* The include_next requires a split double-inclusion guard.  */
  53 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
  54
  55 #endif
  56
  57 #ifndef _GL_SYS_SELECT_H
  58 #define _GL_SYS_SELECT_H
  59
  60 #if !@HAVE_SYS_SELECT_H@
  61
  62 /* A platform that lacks <sys/select.h>.  */
  63
  64 # include <sys/socket.h>
  65
  66 /* The definition of GL_LINK_WARNING is copied here.  */
  67
  68 # ifdef __cplusplus
  69 extern "C" {
  70 # endif
  71
  72 # if @GNULIB_SELECT@
  73 #  if @HAVE_WINSOCK2_H@ || @REPLACE_SELECT@
  74 #   undef select
  75 #   define select rpl_select
  76 extern int rpl_select (int, fd_set *, fd_set *, fd_set *, struct timeval *);
  77 #  endif
  78 # elif @HAVE_WINSOCK2_H@
  79 #  undef select
  80 #  define select select_used_without_requesting_gnulib_module_select
  81 # elif defined GNULIB_POSIXCHECK
  82 #  undef select
  83 #  define select(n,r,w,e,t) \
  84      (GL_LINK_WARNING ("select is not always POSIX compliant - " \
  85                        "use gnulib module select for portability"), \
  86       select (n, r, w, e, t))
  87 # endif
  88
  89 # ifdef __cplusplus
  90 }
  91 # endif
  92
  93 #endif
  94
  95 #endif /* _GL_SYS_SELECT_H */
  96 #endif /* _GL_SYS_SELECT_H */
  97 #endif /* OSF/1 */