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annotate lib/sys_select.in.h @ 13783:47adc262f2b7

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sys_select: Avoid warning due to undeclared memset() on OpenBSD 4.5. * lib/sys_select.in.h: Include <string.h> also on OpenBSD.
author Bruno Haible <bruno@clisp.org>
date Fri, 08 Oct 2010 22:01:50 +0200
parents d06d8f66d2bd
children fd62a5de1a49
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1 /* Substitute for <sys/select.h>.
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2 Copyright (C) 2007-2010 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 # if __GNUC__ >= 3
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19 @PRAGMA_SYSTEM_HEADER@
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20 # endif
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21 @PRAGMA_COLUMNS@
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22
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23 /* On OSF/1, <sys/types.h> and <sys/time.h> include <sys/select.h>.
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24 Simply delegate to the system's header in this case. */
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25 #if @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TYPES_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H) && defined _OSF_SOURCE
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26
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27 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
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28 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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29
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30 #elif @HAVE_SYS_SELECT_H@ && defined __osf__ && (defined _SYS_TIME_H_ && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H) && defined _OSF_SOURCE
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31
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32 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
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33 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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34
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35 #else
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36
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37 #ifndef _GL_SYS_SELECT_H
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38
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39 #if @HAVE_SYS_SELECT_H@
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40
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41 /* On many platforms, <sys/select.h> assumes prior inclusion of
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42 <sys/types.h>. */
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43 # include <sys/types.h>
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44
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45 /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
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46 of 'struct timeval', and no definition of this type.
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47 But avoid namespace pollution on glibc systems. */
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48 # ifndef __GLIBC__
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49 # include <sys/time.h>
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50 # endif
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51
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52 /* On Solaris 10, <sys/select.h> provides an FD_ZERO implementation
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53 that relies on memset(), but without including <string.h>.
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54 But in any case avoid namespace pollution on glibc systems. */
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55 # if (defined __OpenBSD__ || defined __sun || defined __osf__ || defined __BEOS__) \
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56 && ! defined __GLIBC__
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57 # include <string.h>
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58 # endif
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59
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60 /* The include_next requires a split double-inclusion guard. */
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61 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
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62
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63 #endif
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64
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65 #ifndef _GL_SYS_SELECT_H
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66 #define _GL_SYS_SELECT_H
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67
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68 #if !@HAVE_SYS_SELECT_H@ || @REPLACE_SELECT@
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69 /* A platform that lacks <sys/select.h>. */
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70 # include <sys/socket.h>
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71 #endif
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72
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73 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
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74
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75 /* The definition of _GL_WARN_ON_USE is copied here. */
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76
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77
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78 #if @GNULIB_SELECT@
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79 # if @HAVE_WINSOCK2_H@ || @REPLACE_SELECT@
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80 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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81 # undef select
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82 # define select rpl_select
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83 # endif
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84 _GL_FUNCDECL_RPL (select, int,
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85 (int, fd_set *, fd_set *, fd_set *, struct timeval *));
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86 _GL_CXXALIAS_RPL (select, int,
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87 (int, fd_set *, fd_set *, fd_set *, struct timeval *));
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88 # else
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89 _GL_CXXALIAS_SYS (select, int,
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90 (int, fd_set *, fd_set *, fd_set *, struct timeval *));
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91 # endif
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92 _GL_CXXALIASWARN (select);
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93 #elif @HAVE_WINSOCK2_H@
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94 # undef select
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95 # define select select_used_without_requesting_gnulib_module_select
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96 #elif defined GNULIB_POSIXCHECK
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97 # undef select
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98 # if HAVE_RAW_DECL_SELECT
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99 _GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
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100 "use gnulib module select for portability");
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101 # endif
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102 #endif
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103
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104
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105 #endif /* _GL_SYS_SELECT_H */
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106 #endif /* _GL_SYS_SELECT_H */
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107 #endif /* OSF/1 */