annotate lib/sys_select.in.h @ 10655:8668b19a7032

Avoid gcc warnings because of #pragma GCC system_header on older gcc.
author Bruno Haible <bruno@clisp.org>
date Sat, 18 Oct 2008 02:43:18 +0200
parents 535c41e25ab1
children 3c51cf16c4fa
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1 /* Substitute for <sys/select.h>.
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2 Copyright (C) 2007-2008 Free Software Foundation, Inc.
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2, or (at your option)
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7 any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software Foundation,
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16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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17
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18 #ifndef _GL_SYS_SELECT_H
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19
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20 #if @HAVE_SYS_SELECT_H@
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21
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22 # if __GNUC__ >= 3
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23 @PRAGMA_SYSTEM_HEADER@
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24 # endif
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25
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26 /* On many platforms, <sys/select.h> assumes prior inclusion of
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27 <sys/types.h>. */
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28 # include <sys/types.h>
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29
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30 /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
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31 of 'struct timeval', and no definition of this type.. */
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32 # include <sys/time.h>
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33
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34 /* The include_next requires a split double-inclusion guard. */
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35 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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36
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37 #endif
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38
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39 #ifndef _GL_SYS_SELECT_H
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40 #define _GL_SYS_SELECT_H
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41
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42 #if !@HAVE_SYS_SELECT_H@
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43
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44 /* A platform that lacks <sys/select.h>. */
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45
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46 # include <sys/socket.h>
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47
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48 /* The definition of GL_LINK_WARNING is copied here. */
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49
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50 # ifdef __cplusplus
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51 extern "C" {
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52 # endif
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53
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54 # if @GNULIB_SELECT@
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55 # if @HAVE_WINSOCK2_H@
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56 # undef select
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57 # define select rpl_select
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58 extern int rpl_select (int, fd_set *, fd_set *, fd_set *, struct timeval *);
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59 # endif
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60 # elif @HAVE_WINSOCK2_H@
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61 # undef select
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62 # define select select_used_without_requesting_gnulib_module_select
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63 # elif defined GNULIB_POSIXCHECK
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64 # undef select
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65 # define select(n,r,w,e,t) \
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66 (GL_LINK_WARNING ("select is not always POSIX compliant - " \
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67 "use gnulib module select for portability"), \
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68 select (n, r, w, e, t))
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69 # endif
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70
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71 # ifdef __cplusplus
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72 }
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73 # endif
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74
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75 #endif
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76
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77 #endif /* _GL_SYS_SELECT_H */
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78 #endif /* _GL_SYS_SELECT_H */