1 /* Copyright (C) 1993,1994,1995,1997,1999,2011 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
18 /* This file is deprecated and is provided only for compatibility with
19 Unix systems. It is unwise to include this file on programs which
20 are intended only for GNU systems.
24 * Copyright (c) 1982, 1986, 1989 The Regents of the University of California.
25 * All rights reserved.
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28 * modification, are permitted provided that the following conditions
30 * 1. Redistributions of source code must retain the above copyright
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51 * @(#)param.h 7.23 (Berkeley) 5/6/91
57 #define _SYS_PARAM_H 1
63 #include <sys/types.h>
69 # include <ufs/param.h>
73 /* What versions of BSD we are compatible with. */
74 #define BSD 199306 /* System version (year & month). */
78 #define GNU 1994100 /* GNU version (year, month, and release). */
81 /* BSD names for some <limits.h> values. We do not define the BSD names
82 for the values which are not statically limited, such as NOFILE. */
85 #define NGROUPS NGROUPS_MAX
86 #define MAXSYMLINKS SYMLOOP_MAX
87 #define CANBSIZ MAX_CANON /* XXX ? */
89 /* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to
90 compare against some fixed limit. */
91 #define NCARGS INT_MAX
93 /* There is nothing quite equivalent in GNU to Unix "mounts", but there is
94 no limit on the number of simultaneously attached filesystems. */
95 #define NMOUNT INT_MAX
98 /* Magical constants. */
99 #define NOGROUP 65535 /* Marker for empty group set member. */
100 #define NODEV ((dev_t) -1) /* Non-existent device. */
103 /* Bit map related macros. */
104 #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
105 #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
106 #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
107 #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
109 /* Macros for counting and rounding. */
111 # define howmany(x, y) (((x)+((y)-1))/(y))
113 #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
114 #define powerof2(x) ((((x)-1)&(x))==0)
116 /* Macros for min/max. */
117 #define MIN(a,b) (((a)<(b))?(a):(b))
118 #define MAX(a,b) (((a)>(b))?(a):(b))
121 /* Unit of `st_blocks'. */
122 #define DEV_BSIZE 512
125 /* Scale factor for scaled integers used to count %cpu time and load avgs.
127 The number of CPU `tick's that map to a unique `%age' can be expressed
128 by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
129 can be calculated (assuming 32 bits) can be closely approximated using
130 the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15). */
132 #define FSHIFT 11 /* Bits to right of fixed binary point. */
133 #define FSCALE (1<<FSHIFT)
135 #endif /* sys/param.h */