1 /* Substitute for <sys/select.h>.
2 Copyright (C) 2007-2020 Free Software Foundation, Inc.
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 2, or (at your option)
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.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, see <https://www.gnu.org/licenses/>. */
18 @PRAGMA_SYSTEM_HEADER@
22 /* On OSF/1 and Solaris 2.6, <sys/types.h> and <sys/time.h>
23 both include <sys/select.h>.
24 On Cygwin, <sys/time.h> includes <sys/select.h>.
25 Simply delegate to the system's header in this case. */
26 #if (@HAVE_SYS_SELECT_H@ \
27 && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H \
28 && ((defined __osf__ && defined _SYS_TYPES_H_ \
29 && defined _OSF_SOURCE) \
30 || (defined __sun && defined _SYS_TYPES_H \
31 && (! (defined _XOPEN_SOURCE || defined _POSIX_C_SOURCE) \
32 || defined __EXTENSIONS__))))
34 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TYPES_H
35 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
37 #elif (@HAVE_SYS_SELECT_H@ \
38 && (defined _CYGWIN_SYS_TIME_H \
39 || (!defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H \
40 && ((defined __osf__ && defined _SYS_TIME_H_ \
41 && defined _OSF_SOURCE) \
42 || (defined __sun && defined _SYS_TIME_H \
43 && (! (defined _XOPEN_SOURCE \
44 || defined _POSIX_C_SOURCE) \
45 || defined __EXTENSIONS__))))))
47 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_TIME_H
48 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
50 /* On IRIX 6.5, <sys/timespec.h> includes <sys/types.h>, which includes
51 <sys/bsd_types.h>, which includes <sys/select.h>. At this point we cannot
52 include <signal.h>, because that includes <internal/signal_core.h>, which
53 gives a syntax error because <sys/timespec.h> has not been completely
54 processed. Simply delegate to the system's header in this case. */
55 #elif @HAVE_SYS_SELECT_H@ && defined __sgi && (defined _SYS_BSD_TYPES_H && !defined _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H)
57 # define _GL_SYS_SELECT_H_REDIRECT_FROM_SYS_BSD_TYPES_H
58 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
60 /* On OpenBSD 5.0, <pthread.h> includes <sys/types.h>, which includes
61 <sys/select.h>. At this point we cannot include <signal.h>, because that
62 includes gnulib's pthread.h override, which gives a syntax error because
63 /usr/include/pthread.h has not been completely processed. Simply delegate
64 to the system's header in this case. */
65 #elif @HAVE_SYS_SELECT_H@ && defined __OpenBSD__ && (defined _PTHREAD_H_ && !defined PTHREAD_MUTEX_INITIALIZER)
67 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
71 #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
73 /* On many platforms, <sys/select.h> assumes prior inclusion of
74 <sys/types.h>. Also, mingw defines sigset_t there, instead of
75 in <signal.h> where it belongs. */
76 #include <sys/types.h>
78 #if @HAVE_SYS_SELECT_H@
80 /* On OSF/1 4.0, <sys/select.h> provides only a forward declaration
81 of 'struct timeval', and no definition of this type.
82 Also, Mac OS X, AIX, HP-UX, IRIX, Solaris, Interix declare select()
84 But avoid namespace pollution on glibc systems and "unknown type
85 name" problems on Cygwin. */
86 # if !(defined __GLIBC__ || defined __CYGWIN__)
87 # include <sys/time.h>
90 /* On AIX 7 and Solaris 10, <sys/select.h> provides an FD_ZERO implementation
91 that relies on memset(), but without including <string.h>.
92 But in any case avoid namespace pollution on glibc systems. */
93 # if (defined __OpenBSD__ || defined _AIX || defined __sun || defined __osf__ || defined __BEOS__) \
94 && ! defined __GLIBC__
98 /* The include_next requires a split double-inclusion guard. */
99 # @INCLUDE_NEXT@ @NEXT_SYS_SELECT_H@
103 /* Get definition of 'sigset_t'.
104 But avoid namespace pollution on glibc systems and "unknown type
105 name" problems on Cygwin.
106 On OS/2 kLIBC, sigset_t is defined in <sys/select.h>, too. In addition,
107 if <sys/param.h> is included, <types.h> -> <sys/types.h> -> <sys/select.h>
108 are included. Then <signal.h> -> <pthread.h> are included by GNULIB. By the
109 way, <pthread.h> requires PAGE_SIZE defined in <sys/param.h>. However,
110 <sys/param.h> has not been processed, yet. As a result, 'PAGE_SIZE'
111 undeclared error occurs in <pthread.h>.
112 Do this after the include_next (for the sake of OpenBSD 5.0) but before
113 the split double-inclusion guard (for the sake of Solaris). */
114 #if !((defined __GLIBC__ || defined __CYGWIN__ || defined __KLIBC__) \
115 && !defined __UCLIBC__)
119 #ifndef _@GUARD_PREFIX@_SYS_SELECT_H
120 #define _@GUARD_PREFIX@_SYS_SELECT_H
122 #if !@HAVE_SYS_SELECT_H@
123 /* A platform that lacks <sys/select.h>. */
124 /* Get the 'struct timeval' and 'fd_set' types and the FD_* macros
125 on most platforms. */
126 # include <sys/time.h>
127 /* On HP-UX 11, <sys/time.h> provides an FD_ZERO implementation
128 that relies on memset(), but without including <string.h>. */
132 /* On native Windows platforms:
133 Get the 'fd_set' type.
134 Get the close() declaration before we override it. */
135 # if @HAVE_WINSOCK2_H@
136 # if !defined _GL_INCLUDING_WINSOCK2_H
137 # define _GL_INCLUDING_WINSOCK2_H
138 # include <winsock2.h>
139 # undef _GL_INCLUDING_WINSOCK2_H
145 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
147 /* The definition of _GL_WARN_ON_USE is copied here. */
150 /* Fix some definitions from <winsock2.h>. */
152 #if @HAVE_WINSOCK2_H@
154 # if !GNULIB_defined_rpl_fd_isset
156 /* Re-define FD_ISSET to avoid a WSA call while we are not using
159 rpl_fd_isset (SOCKET fd
, fd_set
* set
)
165 for (i
= 0; i
< set
->fd_count
; i
++)
166 if (set
->fd_array
[i
] == fd
)
172 # define GNULIB_defined_rpl_fd_isset 1
176 # define FD_ISSET(fd, set) rpl_fd_isset(fd, set)
180 /* Hide some function declarations from <winsock2.h>. */
182 #if @HAVE_WINSOCK2_H@
183 # if !defined _@GUARD_PREFIX@_UNISTD_H
184 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
186 # define close close_used_without_including_unistd_h
187 # elif !defined __clang__
188 _GL_WARN_ON_USE (close
,
189 "close() used without including <unistd.h>");
191 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
193 # define gethostname gethostname_used_without_including_unistd_h
194 # elif !defined __clang__
195 _GL_WARN_ON_USE (gethostname
,
196 "gethostname() used without including <unistd.h>");
199 # if !defined _@GUARD_PREFIX@_SYS_SOCKET_H
200 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
202 # define socket socket_used_without_including_sys_socket_h
204 # define connect connect_used_without_including_sys_socket_h
206 # define accept accept_used_without_including_sys_socket_h
208 # define bind bind_used_without_including_sys_socket_h
210 # define getpeername getpeername_used_without_including_sys_socket_h
212 # define getsockname getsockname_used_without_including_sys_socket_h
214 # define getsockopt getsockopt_used_without_including_sys_socket_h
216 # define listen listen_used_without_including_sys_socket_h
218 # define recv recv_used_without_including_sys_socket_h
220 # define send send_used_without_including_sys_socket_h
222 # define recvfrom recvfrom_used_without_including_sys_socket_h
224 # define sendto sendto_used_without_including_sys_socket_h
226 # define setsockopt setsockopt_used_without_including_sys_socket_h
228 # define shutdown shutdown_used_without_including_sys_socket_h
229 # elif !defined __clang__
230 _GL_WARN_ON_USE (socket
,
231 "socket() used without including <sys/socket.h>");
232 _GL_WARN_ON_USE (connect
,
233 "connect() used without including <sys/socket.h>");
234 _GL_WARN_ON_USE (accept
,
235 "accept() used without including <sys/socket.h>");
236 _GL_WARN_ON_USE (bind
,
237 "bind() used without including <sys/socket.h>");
238 _GL_WARN_ON_USE (getpeername
,
239 "getpeername() used without including <sys/socket.h>");
240 _GL_WARN_ON_USE (getsockname
,
241 "getsockname() used without including <sys/socket.h>");
242 _GL_WARN_ON_USE (getsockopt
,
243 "getsockopt() used without including <sys/socket.h>");
244 _GL_WARN_ON_USE (listen
,
245 "listen() used without including <sys/socket.h>");
246 _GL_WARN_ON_USE (recv
,
247 "recv() used without including <sys/socket.h>");
248 _GL_WARN_ON_USE (send
,
249 "send() used without including <sys/socket.h>");
250 _GL_WARN_ON_USE (recvfrom
,
251 "recvfrom() used without including <sys/socket.h>");
252 _GL_WARN_ON_USE (sendto
,
253 "sendto() used without including <sys/socket.h>");
254 _GL_WARN_ON_USE (setsockopt
,
255 "setsockopt() used without including <sys/socket.h>");
256 _GL_WARN_ON_USE (shutdown
,
257 "shutdown() used without including <sys/socket.h>");
264 # if @REPLACE_PSELECT@
265 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
267 # define pselect rpl_pselect
269 _GL_FUNCDECL_RPL (pselect
, int,
270 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
271 struct timespec
const *restrict
, const sigset_t
*restrict
));
272 _GL_CXXALIAS_RPL (pselect
, int,
273 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
274 struct timespec
const *restrict
, const sigset_t
*restrict
));
277 _GL_FUNCDECL_SYS (pselect
, int,
278 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
279 struct timespec
const *restrict
, const sigset_t
*restrict
));
281 _GL_CXXALIAS_SYS (pselect
, int,
282 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
283 struct timespec
const *restrict
, const sigset_t
*restrict
));
285 _GL_CXXALIASWARN (pselect
);
286 #elif defined GNULIB_POSIXCHECK
288 # if HAVE_RAW_DECL_PSELECT
289 _GL_WARN_ON_USE (pselect
, "pselect is not portable - "
290 "use gnulib module pselect for portability");
295 # if @REPLACE_SELECT@
296 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
298 # define select rpl_select
300 _GL_FUNCDECL_RPL (select
, int,
301 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
302 struct timeval
*restrict
));
303 _GL_CXXALIAS_RPL (select
, int,
304 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
307 _GL_CXXALIAS_SYS (select
, int,
308 (int, fd_set
*restrict
, fd_set
*restrict
, fd_set
*restrict
,
311 _GL_CXXALIASWARN (select
);
312 #elif @HAVE_WINSOCK2_H@
314 # define select select_used_without_requesting_gnulib_module_select
315 #elif defined GNULIB_POSIXCHECK
317 # if HAVE_RAW_DECL_SELECT
318 _GL_WARN_ON_USE (select
, "select is not always POSIX compliant - "
319 "use gnulib module select for portability");
324 #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */
325 #endif /* _@GUARD_PREFIX@_SYS_SELECT_H */