2011-09-08 23:48:47 +00:00
|
|
|
/* Checking macros for select functions.
|
2017-01-01 00:14:16 +00:00
|
|
|
Copyright (C) 2011-2017 Free Software Foundation, Inc.
|
2011-09-08 23:48:47 +00:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
|
|
|
|
|
|
The GNU C Library 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.
|
|
|
|
|
|
|
|
|
|
The GNU C Library 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
|
2012-02-09 23:18:22 +00:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
2011-09-08 23:48:47 +00:00
|
|
|
|
|
|
|
|
#ifndef _SYS_SELECT_H
|
|
|
|
|
# error "Never include <bits/select2.h> directly; use <sys/select.h> instead."
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Helper functions to issue warnings and errors when needed. */
|
2012-06-13 16:57:18 +00:00
|
|
|
extern long int __fdelt_chk (long int __d);
|
|
|
|
|
extern long int __fdelt_warn (long int __d)
|
2011-09-08 23:48:47 +00:00
|
|
|
__warnattr ("bit outside of fd_set selected");
|
2011-09-13 12:41:37 +00:00
|
|
|
#undef __FD_ELT
|
|
|
|
|
#define __FD_ELT(d) \
|
2011-12-02 10:34:28 +00:00
|
|
|
__extension__ \
|
2012-06-13 16:57:18 +00:00
|
|
|
({ long int __d = (d); \
|
2011-09-08 23:48:47 +00:00
|
|
|
(__builtin_constant_p (__d) \
|
2012-06-13 16:57:18 +00:00
|
|
|
? (0 <= __d && __d < __FD_SETSIZE \
|
|
|
|
|
? (__d / __NFDBITS) \
|
|
|
|
|
: __fdelt_warn (__d)) \
|
2011-09-08 23:48:47 +00:00
|
|
|
: __fdelt_chk (__d)); })
|
