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emacs/lib/sys_select.in.h
Paul Eggert 08550d058f Update from Gnulib by running admin/merge-gnulib
2024-05-18 10:23:50 -07:00

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/* Substitute for <sys/select.h>.
Copyright (C) 2007-2024 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
# if __GNUC__ >= 3
@PRAGMA_SYSTEM_HEADER@
# endif
@PRAGMA_COLUMNS@
/* This file uses #include_next of a system file that defines time_t.
For the 'year2038' module to work right, <config.h> needs to have been
included before. */
#if !_GL_CONFIG_H_INCLUDED
#error "Please include config.h first."
#endif
/* On OSF/1 and Solaris 2.6, <sys/types.h> and <sys/time.h>
both include <sys/select.h>.
On Cygwin and OpenBSD, <sys/time.h> includes <sys/select.h>.
Simply delegate to the system's header in this case. */
#if (@HAVE_SYS_SELECT_H@ \
&& !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H \
&& ((defined __osf__ && defined _SYS_TYPES_H_ \
&& defined _OSF_SOURCE) \
|| (defined __sun && defined _SYS_TYPES_H \
&& (! (defined _XOPEN_SOURCE || defined _POSIX_C_SOURCE) \
|| defined __EXTENSIONS__))))
# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
#elif (@HAVE_SYS_SELECT_H@ \
&& (defined _CYGWIN_SYS_TIME_H \
|| (!defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H \
&& ((defined __osf__ && defined _SYS_TIME_H_ \
&& defined _OSF_SOURCE) \
|| (defined __OpenBSD__ && defined _SYS_TIME_H_) \
|| (defined __sun && defined _SYS_TIME_H \
&& (! (defined _XOPEN_SOURCE \
|| defined _POSIX_C_SOURCE) \
|| defined __EXTENSIONS__))))))
# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
/* On IRIX 6.5, <sys/timespec.h> includes <sys/types.h>, which includes
<sys/bsd_types.h>, which includes <sys/select.h>. At this point we cannot
include <signal.h>, because that includes <internal/signal_core.h>, which
gives a syntax error because <sys/timespec.h> has not been completely
processed. Simply delegate to the system's header in this case. */
#elif @HAVE_SYS_SELECT_H@ && defined __sgi && (defined _SYS_BSD_TYPES_H && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H)
# define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
/* On OpenBSD 5.0, <pthread.h> includes <sys/types.h>, which includes
<sys/select.h>. At this point we cannot include <signal.h>, because that
includes gnulib's pthread.h override, which gives a syntax error because
/usr/include/pthread.h has not been completely processed. Simply delegate
to the system's header in this case. */
#elif @HAVE_SYS_SELECT_H@ && defined __OpenBSD__ && (defined _PTHREAD_H_ && !defined PTHREAD_MUTEX_INITIALIZER)
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
#else
#ifndef _@GUARD_PREFIX@_SYS_SELECT_H
/* This file uses GNULIB_POSIXCHECK, HAVE_RAW_DECL_*. */
#if !_GL_CONFIG_H_INCLUDED
#error "Please include config.h first."
#endif
/* On many platforms, <sys/select.h> assumes prior inclusion of
<sys/types.h>. Also, mingw defines sigset_t there, instead of
in <signal.h> where it belongs. */
#include <sys/types.h>
#if @HAVE_SYS_SELECT_H@
/* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
of 'struct timeval', and no definition of this type.
Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
in <sys/time.h>.
But avoid namespace pollution on glibc systems, a circular include
<sys/select.h> -> <sys/time.h> -> <sys/select.h> on FreeBSD 13.1, and
"unknown type name" problems on Cygwin. */
# if !(defined __GLIBC__ || defined __FreeBSD__ || defined __CYGWIN__)
# include <sys/time.h>
# endif
/* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
that relies on memset(), but without including <string.h>.
But in any case avoid namespace pollution on glibc systems. */
# if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
&& ! defined __GLIBC__
# include <string.h>
# endif
/* The include_next requires a split double-inclusion guard. */
# @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
#endif
/* Get definition of 'sigset_t'.
But avoid namespace pollution on glibc systems and "unknown type
name" problems on Cygwin.
On OS/2 kLIBC, sigset_t is defined in <sys/select.h>, too. In addition,
if <sys/param.h> is included, <types.h> -> <sys/types.h> -> <sys/select.h>
are included. Then <signal.h> -> <pthread.h> are included by GNULIB. By the
way, <pthread.h> requires PAGE_SIZE defined in <sys/param.h>. However,
<sys/param.h> has not been processed, yet. As a result, 'PAGE_SIZE'
undeclared error occurs in <pthread.h>.
Do this after the include_next (for the sake of OpenBSD 5.0) but before
the split double-inclusion guard (for the sake of Solaris). */
#if !((defined __GLIBC__ || defined __CYGWIN__ || defined __KLIBC__) \
&& !defined __UCLIBC__)
# include <signal.h>
#endif
#ifndef _@GUARD_PREFIX@_SYS_SELECT_H
#define _@GUARD_PREFIX@_SYS_SELECT_H
#if !@HAVE_SYS_SELECT_H@
/* A platform that lacks <sys/select.h>. */
/* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
on most platforms. */
# include <sys/time.h>
/* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
that relies on memset(), but without including <string.h>. */
# if defined __hpux
# include <string.h>
# endif
/* On native Windows platforms:
Get the 'fd_set' type.
Get the close() declaration before we override it. */
# if @HAVE_WINSOCK2_H@
# if !defined _GL_INCLUDING_WINSOCK2_H
# define _GL_INCLUDING_WINSOCK2_H
# include <winsock2.h>
# undef _GL_INCLUDING_WINSOCK2_H
# endif
# include <io.h>
# endif
#endif
/* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
/* The definition of _GL_WARN_ON_USE is copied here. */
/* Fix some definitions from <winsock2.h>. */
#if @HAVE_WINSOCK2_H@
# if !GNULIB_defined_rpl_fd_isset
/* Re-define FD_ISSET to avoid a WSA call while we are not using
network sockets. */
static int
rpl_fd_isset (SOCKET fd, fd_set * set)
{
u_int i;
if (set == NULL)
return 0;
for (i = 0; i < set->fd_count; i++)
if (set->fd_array[i] == fd)
return 1;
return 0;
}
# define GNULIB_defined_rpl_fd_isset 1
# endif
# undef FD_ISSET
# define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
#endif
/* Hide some function declarations from <winsock2.h>. */
#if @HAVE_WINSOCK2_H@
# if !defined _@GUARD_PREFIX@_UNISTD_H
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef close
# define close close_used_without_including_unistd_h
# elif !defined __clang__
_GL_WARN_ON_USE (close,
"close() used without including <unistd.h>");
# endif
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef gethostname
# define gethostname gethostname_used_without_including_unistd_h
# elif !defined __clang__
_GL_WARN_ON_USE (gethostname,
"gethostname() used without including <unistd.h>");
# endif
# endif
# if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef socket
# define socket socket_used_without_including_sys_socket_h
# undef connect
# define connect connect_used_without_including_sys_socket_h
# undef accept
# define accept accept_used_without_including_sys_socket_h
# undef bind
# define bind bind_used_without_including_sys_socket_h
# undef getpeername
# define getpeername getpeername_used_without_including_sys_socket_h
# undef getsockname
# define getsockname getsockname_used_without_including_sys_socket_h
# undef getsockopt
# define getsockopt getsockopt_used_without_including_sys_socket_h
# undef listen
# define listen listen_used_without_including_sys_socket_h
# undef recv
# define recv recv_used_without_including_sys_socket_h
# undef send
# define send send_used_without_including_sys_socket_h
# undef recvfrom
# define recvfrom recvfrom_used_without_including_sys_socket_h
# undef sendto
# define sendto sendto_used_without_including_sys_socket_h
# undef setsockopt
# define setsockopt setsockopt_used_without_including_sys_socket_h
# undef shutdown
# define shutdown shutdown_used_without_including_sys_socket_h
# elif !defined __clang__
_GL_WARN_ON_USE (socket,
"socket() used without including <sys/socket.h>");
_GL_WARN_ON_USE (connect,
"connect() used without including <sys/socket.h>");
_GL_WARN_ON_USE (accept,
"accept() used without including <sys/socket.h>");
_GL_WARN_ON_USE (bind,
"bind() used without including <sys/socket.h>");
_GL_WARN_ON_USE (getpeername,
"getpeername() used without including <sys/socket.h>");
_GL_WARN_ON_USE (getsockname,
"getsockname() used without including <sys/socket.h>");
_GL_WARN_ON_USE (getsockopt,
"getsockopt() used without including <sys/socket.h>");
_GL_WARN_ON_USE (listen,
"listen() used without including <sys/socket.h>");
_GL_WARN_ON_USE (recv,
"recv() used without including <sys/socket.h>");
_GL_WARN_ON_USE (send,
"send() used without including <sys/socket.h>");
_GL_WARN_ON_USE (recvfrom,
"recvfrom() used without including <sys/socket.h>");
_GL_WARN_ON_USE (sendto,
"sendto() used without including <sys/socket.h>");
_GL_WARN_ON_USE (setsockopt,
"setsockopt() used without including <sys/socket.h>");
_GL_WARN_ON_USE (shutdown,
"shutdown() used without including <sys/socket.h>");
# endif
# endif
#endif
#if @GNULIB_PSELECT@
# if @REPLACE_PSELECT@
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef pselect
# define pselect rpl_pselect
# endif
_GL_FUNCDECL_RPL (pselect, int,
(int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
struct timespec const *restrict, const sigset_t *restrict));
_GL_CXXALIAS_RPL (pselect, int,
(int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
struct timespec const *restrict, const sigset_t *restrict));
# else
# if !@HAVE_PSELECT@
_GL_FUNCDECL_SYS (pselect, int,
(int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
struct timespec const *restrict, const sigset_t *restrict));
# endif
/* Need to cast, because on AIX 7, the second, third, fourth argument may be
void *restrict, void *restrict, void *restrict. */
_GL_CXXALIAS_SYS_CAST (pselect, int,
(int,
fd_set *restrict, fd_set *restrict, fd_set *restrict,
struct timespec const *restrict,
const sigset_t *restrict));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (pselect);
# endif
#elif defined GNULIB_POSIXCHECK
# undef pselect
# if HAVE_RAW_DECL_PSELECT
_GL_WARN_ON_USE (pselect, "pselect is not portable - "
"use gnulib module pselect for portability");
# endif
#endif
#if @GNULIB_SELECT@
# if @REPLACE_SELECT@
# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
# undef select
# define select rpl_select
# endif
_GL_FUNCDECL_RPL (select, int,
(int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
struct timeval *restrict));
_GL_CXXALIAS_RPL (select, int,
(int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
timeval *restrict));
# else
_GL_CXXALIAS_SYS (select, int,
(int, fd_set *restrict, fd_set *restrict, fd_set *restrict,
timeval *restrict));
# endif
# if __GLIBC__ >= 2
_GL_CXXALIASWARN (select);
# endif
#elif @HAVE_WINSOCK2_H@
# undef select
# define select select_used_without_requesting_gnulib_module_select
#elif defined GNULIB_POSIXCHECK
# undef select
# if HAVE_RAW_DECL_SELECT
_GL_WARN_ON_USE (select, "select is not always POSIX compliant - "
"use gnulib module select for portability");
# endif
#endif
#endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
#endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
#endif /* OSF/1 */
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