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Split sys/param.h out into common file and sysdeps bits/param.h file.

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This commit is contained in:
Roland McGrath
2012-08-17 09:55:17 -07:00
parent b7c08a66f6
commit e66a42f57f
8 changed files with 144 additions and 163 deletions
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82
sysdeps/unix/sysv/linux/sys/param.h
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/* Copyright (C) 1995-1997,2000,2001,2003,2008,2011
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_PARAM_H
#define _SYS_PARAM_H 1
#ifndef ARG_MAX
# define __undef_ARG_MAX
#endif
#include <limits.h>
#include <linux/limits.h>
#include <linux/param.h>
/* The kernel headers defines ARG_MAX. The value is wrong, though. */
#ifdef __undef_ARG_MAX
# undef ARG_MAX
# undef __undef_ARG_MAX
#endif
/* BSD names for some <limits.h> values. */
#define NBBY CHAR_BIT
#ifndef NGROUPS
# define NGROUPS NGROUPS_MAX
#endif
#define MAXSYMLINKS 20
#define CANBSIZ MAX_CANON
#define MAXPATHLEN PATH_MAX
/* The following are not really correct but it is a value we used for a
long time and which seems to be usable. People should not use NOFILE
and NCARGS anyway. */
#define NOFILE 256
#define NCARGS 131072
#include <sys/types.h>
/* Bit map related macros. */
#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
/* Macros for counting and rounding. */
#ifndef howmany
# define howmany(x, y) (((x) + ((y) - 1)) / (y))
#endif
#ifdef __GNUC__
# define roundup(x, y) (__builtin_constant_p (y) && powerof2 (y) \
? (((x) + (y) - 1) & ~((y) - 1)) \
: ((((x) + ((y) - 1)) / (y)) * (y)))
#else
# define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
#endif
#define powerof2(x) ((((x) - 1) & (x)) == 0)
/* Macros for min/max. */
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
/* Unit of `st_blocks'. */
#define DEV_BSIZE 512
#endif /* sys/param.h */