| /* Test of <sys/select.h> substitute. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program 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 General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ |
| |
| #include <config.h> |
| |
| #include <sys/select.h> |
| |
| #include "signature.h" |
| |
| /* The following may be macros without underlying functions, so only |
| check signature if they are not macros. */ |
| #ifndef FD_CLR |
| SIGNATURE_CHECK (FD_CLR, void, (int, fd_set *)); |
| #endif |
| #ifndef FD_ISSET |
| SIGNATURE_CHECK (FD_ISSET, void, (int, fd_set *)); |
| #endif |
| #ifndef FD_SET |
| SIGNATURE_CHECK (FD_SET, int, (int, fd_set *)); |
| #endif |
| #ifndef FD_ZERO |
| SIGNATURE_CHECK (FD_ZERO, void, (fd_set *)); |
| #endif |
| |
| /* Check that the 'struct timeval' type is defined. */ |
| struct timeval a; |
| |
| /* Check that a.tv_sec is wide enough to hold a time_t, ignoring |
| signedness issues. */ |
| typedef int verify_tv_sec_type[sizeof (time_t) <= sizeof (a.tv_sec) ? 1 : -1]; |
| |
| /* Check that sigset_t is defined. */ |
| sigset_t t2; |
| |
| int |
| main (void) |
| { |
| /* Check that FD_ZERO can be used. This should not yield a warning |
| such as "warning: implicit declaration of function 'memset'". */ |
| fd_set fds; |
| FD_ZERO (&fds); |
| |
| return 0; |
| } |