Annotation of prex-old/include/sys/param.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 1982, 1986, 1989, 1993
3: * The Regents of the University of California. All rights reserved.
4: * (c) UNIX System Laboratories, Inc.
5: * All or some portions of this file are derived from material licensed
6: * to the University of California by American Telephone and Telegraph
7: * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8: * the permission of UNIX System Laboratories, Inc.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: * 3. Neither the name of the University nor the names of its contributors
19: * may be used to endorse or promote products derived from this software
20: * without specific prior written permission.
21: *
22: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32: * SUCH DAMAGE.
33: *
34: * @(#)param.h 8.3 (Berkeley) 4/4/95
35: */
36:
37: #include <conf/config.h>
38:
39: #define BSD 199506 /* System version (year & month). */
40: #define BSD4_3 1
41: #define BSD4_4 1
42:
43: #include <sys/null.h>
44:
45: #ifndef LOCORE
46: #include <sys/types.h>
47: #endif
48:
49: /*
50: * Machine-independent constants (some used in following include files).
51: * Redefined constants are from POSIX 1003.1 limits file.
52: *
53: * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
54: * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
55: */
56: #include <sys/syslimits.h>
57:
58: #define MAXCOMLEN 16 /* max command name remembered */
59: #define MAXINTERP 32 /* max interpreter file name length */
60: #define MAXLOGNAME 12 /* max login name length */
61: #define MAXUPRC CHILD_MAX /* max simultaneous processes */
62: #define NCARGS ARG_MAX /* max bytes for an exec function */
63: #define NGROUPS NGROUPS_MAX /* max number groups */
64: #define NOFILE OPEN_MAX /* max open files per process */
65: #define NOGROUP 65535 /* marker for empty group set member */
66: #define MAXHOSTNAMELEN 32 /* max hostname size */
67:
68: #define MAXTASKNAME 12 /* max task name */
69: #define MAXDEVNAME 12 /* max device name */
70: #define MAXOBJNAME 16 /* max object name */
71: #define MAXEVTNAME 12 /* max event name */
72:
73: #define HZ CONFIG_HZ /* ticks per second */
74: #define PAGE_SIZE CONFIG_PAGE_SIZE
75: #define KSTACK_SIZE CONFIG_KSTACK_SIZE /* kernel stack size */
76: #define USTACK_SIZE CONFIG_USTACK_SIZE /* user stack size */
77:
78: /* More types and definitions used throughout the kernel. */
79: #ifdef KERNEL
80: #include <sys/cdefs.h>
81: #include <sys/errno.h>
82: #endif
83:
84: #ifndef KERNEL
85: /* Signals. */
86: #include <sys/signal.h>
87: #endif
88:
89: #include <machine/limits.h>
90:
91: /*
92: * Round p (pointer or byte index) up to a correctly-aligned value for all
93: * data types (int, long, ...). The result is u_int and must be cast to
94: * any desired pointer type.
95: */
96: #define ALIGNBYTES 3
97: #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
98:
99: /*
100: * Memory page
101: */
102: #define PAGE_MASK (PAGE_SIZE-1)
103: #define PAGE_ALIGN(n) ((((u_long)(n)) + PAGE_MASK) & ~PAGE_MASK)
104: #define PAGE_TRUNC(n) (((u_long)(n)) & ~PAGE_MASK)
105:
106: /*
107: * MAXPATHLEN defines the longest permissable path length after expanding
108: * symbolic links. It is used to allocate a temporary buffer from the buffer
109: * pool in which to do the name expansion, hence should be a power of two,
110: * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
111: * maximum number of symbolic links that may be expanded in a path name.
112: * It should be set high enough to allow all legitimate uses, but halt
113: * infinite loops reasonably quickly.
114: */
115: #define MAXPATHLEN PATH_MAX
116: #define MAXSYMLINKS 8
117:
118: /* Bit map related macros. */
119: #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
120: #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
121: #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
122: #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
123:
124: /* Macros for counting and rounding. */
125: #ifndef howmany
126: #define howmany(x, y) (((x)+((y)-1))/(y))
127: #endif
128: #define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
129: #define powerof2(x) ((((x)-1)&(x))==0)
130:
131: /* Macros for min/max. */
132: #ifndef KERNEL
133: #define MIN(a,b) (((a)<(b))?(a):(b))
134: #define MAX(a,b) (((a)>(b))?(a):(b))
135: #endif
136:
137: #define BSIZE 512 /* size of secondary block (bytes) */
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