[thirdparty/glibc.git] / misc / bits / select2.h

/* Checking macros for select functions.
   Copyright (C) 2011-2024 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
   <https://www.gnu.org/licenses/>.  */

#ifndef _SYS_SELECT_H
# error "Never include <bits/select2.h> directly; use <sys/select.h> instead."
#endif

#include <bits/select-decl.h>

#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)); })
Commit	Line	Data
a0f33f99	1	/* Checking macros for select functions.
dff8da6b	2	Copyright (C) 2011-2024 Free Software Foundation, Inc.
a0f33f99 UD	3	This file is part of the GNU C Library.
	4
	5	The GNU C Library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Lesser General Public
	7	License as published by the Free Software Foundation; either
	8	version 2.1 of the License, or (at your option) any later version.
	9
	10	The GNU C Library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Lesser General Public License for more details.
	14
	15	You should have received a copy of the GNU Lesser General Public
59ba27a6	16	License along with the GNU C Library; if not, see
5a82c748	17	<https://www.gnu.org/licenses/>. */
a0f33f99 UD	18
	19	#ifndef _SYS_SELECT_H
	20	# error "Never include <bits/select2.h> directly; use <sys/select.h> instead."
	21	#endif
	22
d9a99272 FB	23	#include <bits/select-decl.h>
d9a99272 FB	24
e529793b AS	25	#undef __FD_ELT
e529793b AS	26	#define __FD_ELT(d) \
d4cc29a2	27	__extension__ \
ceb9e56b	28	({ long int __d = (d); \
a0f33f99	29	(__builtin_constant_p (__d) \
ceb9e56b PP	30	? (0 <= __d && __d < __FD_SETSIZE \
	31	? (__d / __NFDBITS) \
	32	: __fdelt_warn (__d)) \
a0f33f99	33	: __fdelt_chk (__d)); })