glibc/misc/bits/select2.h
Paul Pluzhnikov ceb9e56b3d Suppress sign-conversion warning from FD_SET.
[BZ #14210] See <http://sourceware.org/ml/libc-alpha/2012-05/msg01794.html>.
* debug/fdelt_chk.c (__fdelt_chk): Accept and return long int,
not unsigned long int.
* misc/bits/select2.h (__fdelt_chk, __fdelt_warn, __FD_ELT): Likewise.
2012-06-13 09:57:18 -07:00

36 lines
1.4 KiB
C

/* Checking macros for select functions.
Copyright (C) 2011, 2012 Free Software Foundation, Inc.
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
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#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. */
extern long int __fdelt_chk (long int __d);
extern long int __fdelt_warn (long int __d)
__warnattr ("bit outside of fd_set selected");
#undef __FD_ELT
#define __FD_ELT(d) \
__extension__ \
({ long int __d = (d); \
(__builtin_constant_p (__d) \
? (0 <= __d && __d < __FD_SETSIZE \
? (__d / __NFDBITS) \
: __fdelt_warn (__d)) \
: __fdelt_chk (__d)); })