minix/nbsd_include/sys/param.h

185 lines
5.5 KiB
C
Raw Normal View History

2011-02-21 14:13:55 +01:00
#ifndef _SYS_PARAM_H_
#define _SYS_PARAM_H_
/*
* Historic BSD #defines -- probably will remain untouched for all time.
*/
#define BSD 199506 /* System version (year & month). */
#define BSD4_3 1
#ifndef __minix
2011-02-21 14:13:55 +01:00
#define BSD4_4 1
#endif
2011-02-21 14:13:55 +01:00
/*
* #define __NetBSD_Version__ MMmmrrpp00
*
* M = major version
* m = minor version; a minor number of 99 indicates current.
* r = 0 (*)
* p = patchlevel
*
* When new releases are made, src/gnu/usr.bin/groff/tmac/mdoc.local
* needs to be updated and the changes sent back to the groff maintainers.
*
* (*) Up to 2.0I "release" used to be "",A-Z,Z[A-Z] but numeric
* e.g. NetBSD-1.2D = 102040000 ('D' == 4)
* NetBSD-2.0H (200080000) was changed on 20041001 to:
* 2.99.9 (299000900)
*/
#define __NetBSD_Version__ 599002900 /* NetBSD 5.99.29 */
#define __NetBSD_Prereq__(M,m,p) (((((M) * 100000000) + \
(m) * 1000000) + (p) * 100) <= __NetBSD_Version__)
/*
* Historical NetBSD #define
*
* NetBSD 1.4 was the last release for which this value was incremented.
* The value is now permanently fixed at 199905. It will never be
* changed again.
*
* New code must use __NetBSD_Version__ instead, and should not even
* count on NetBSD being defined.
*
*/
#define NetBSD 199905 /* NetBSD version (year & month). */
#include <sys/null.h>
#ifndef __ASSEMBLER__
#include <sys/inttypes.h>
#include <sys/types.h>
/*
* Machine-independent constants (some used in following include files).
* Redefined constants are from POSIX 1003.1 limits file.
*
* MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
* MAXHOSTNAMELEN should be >= (_POSIX_HOST_NAME_MAX + 1) (see <limits.h>)
* MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
*/
#include <sys/syslimits.h>
#define MAXCOMLEN 16 /* max command name remembered */
#define MAXINTERP PATH_MAX /* max interpreter file name length */
/* DEPRECATED: use LOGIN_NAME_MAX instead. */
#define MAXLOGNAME (LOGIN_NAME_MAX - 1) /* max login name length */
#ifndef __minix
#define NCARGS ARG_MAX /* max bytes for an exec function */
#endif
#define NGROUPS NGROUPS_MAX /* max number groups */
#define NOGROUP 65535 /* marker for empty group set member */
#define MAXHOSTNAMELEN 256 /* max hostname size */
#ifndef NOFILE
#define NOFILE OPEN_MAX /* max open files per process */
#endif
#ifndef MAXUPRC /* max simultaneous processes */
#define MAXUPRC CHILD_MAX /* POSIX 1003.1-compliant default */
#else
#if (MAXUPRC - 0) < CHILD_MAX
#error MAXUPRC less than CHILD_MAX. See options(4) for details.
#endif /* (MAXUPRC - 0) < CHILD_MAX */
#endif /* !defined(MAXUPRC) */
/* Signals. */
#include <sys/signal.h>
/* Machine type dependent parameters. */
#include <machine/param.h>
#include <machine/limits.h>
/* pages ("clicks") to disk blocks */
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/* bytes to pages */
#define ctob(x) ((x) << PGSHIFT)
#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
/* bytes to disk blocks */
#define dbtob(x) ((x) << DEV_BSHIFT)
#define btodb(x) ((x) >> DEV_BSHIFT)
#ifndef COHERENCY_UNIT
#define COHERENCY_UNIT 64
#endif
#ifndef CACHE_LINE_SIZE
#define CACHE_LINE_SIZE 64
#endif
#ifndef MAXCPUS
#define MAXCPUS 32
#endif
#ifndef MAX_LWP_PER_PROC
#define MAX_LWP_PER_PROC 8000
#endif
/*
* Miscellaneous.
*/
#define NBPW sizeof(int) /* number of bytes per word (integer) */
#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */
#define NODEV (dev_t)(-1) /* non-existent device */
#define CBLOCK 64 /* Clist block size, must be a power of 2. */
#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */
/* Data chars/clist. */
#define CBSIZE (CBLOCK - (int)sizeof(struct cblock *) - CBQSIZE)
#define CROUND (CBLOCK - 1) /* Clist rounding. */
/*
* File system parameters and macros.
*
* The file system is made out of blocks of at most MAXBSIZE units, with
* smaller units (fragments) only in the last direct block. MAXBSIZE
* primarily determines the size of buffers in the buffer pool. It may be
* made larger without any effect on existing file systems; however making
* it smaller may make some file systems unmountable.
*/
#ifndef MAXBSIZE /* XXX */
#define MAXBSIZE MAXPHYS
#endif
#define MAXFRAG 8
/*
* MAXPATHLEN defines the longest permissible path length after expanding
* symbolic links. It is used to allocate a temporary buffer from the buffer
* pool in which to do the name expansion, hence should be a power of two,
* and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the
* maximum number of symbolic links that may be expanded in a path name.
* It should be set high enough to allow all legitimate uses, but halt
* infinite loops reasonably quickly.
*
* MAXSYMLINKS should be >= _POSIX_SYMLOOP_MAX (see <limits.h>)
*/
#define MAXPATHLEN PATH_MAX
#define MAXSYMLINKS 32
/* 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
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
#define rounddown(x,y) (((x)/(y))*(y))
#define roundup2(x, m) (((x) + (m) - 1) & ~((m) - 1))
#define powerof2(x) ((((x)-1)&(x))==0)
/* Macros for min/max. */
#define MIN(a,b) ((/*CONSTCOND*/(a)<(b))?(a):(b))
#define MAX(a,b) ((/*CONSTCOND*/(a)>(b))?(a):(b))
#endif /* !__ASSEMBLER__ */
#endif /* !_SYS_PARAM_H_ */