Sprite 1984 - 1993/Sprite 1984 - 1993.iso/src/lib/include/sys/RCS/param.h,v

Text File | 1991-12-16 | 6.3 KB | 385 lines

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1.15
date     91.12.16.14.02.47;  author rab;  state Exp;
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date     89.07.14.09.15.24;  author rab;  state Exp;
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date     88.07.22.11.28.07;  author ouster;  state Exp;
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desc
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1.15
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@Added definition of HZ.
@
text
@/*
 * param.h --
 *
 *    This file is modelled after the UNIX include file <sys/param.h>,
 *    but it only contains information that is actually used by user
 *    processes running under Sprite (the UNIX file contains mostly
 *    stuff for the kernel's use).  This file started off empty, and
 *    will gradually accumulate definitions as the needs of user
 *    processes become clearer.
 *
 * Copyright 1988 Regents of the University of California
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies.  The University of California
 * makes no representations about the suitability of this
 * software for any purpose.  It is provided "as is" without
 * express or implied warranty.
 *
 * $Header: /sprite/src/lib/include/sys/RCS/param.h,v 1.14 91/11/05 17:16:01 rab Exp Locker: rab $ SPRITE (Berkeley)
 */

#ifndef _SYS_PARAM_H
#define _SYS_PARAM_H

#include <sys/types.h>
#include <signal.h>
#include <machparam.h>

#define HZ      60

/*
 * MAXPATHLEN defines the longest permissable path length
 * after expanding symbolic links.
 */
#define MAXPATHLEN      1024

/*
 * MAXBSIZE defines the largest block size stored in the file system.
 */
#define MAXBSIZE    4096

/*
 * The macro below converts from the "st_blocks" field of a "struct stat"
 * to the number of bytes allocated to a file.  The "st_blocks" field
 * is currently measured in (archaic) 512-byte units.
 */
#define dbtob(blocks) ((unsigned) (blocks) << 9)

/*
 * MAXHOSTNAMELEN defines the maximum length of a host name in the
 * network.
 */
#define MAXHOSTNAMELEN 64

/*
 * Maximum number of characters in the argument list for exec.  Is this
 * really a limit in Sprite, or is it here just for backward compatibility?
 */
#define NCARGS 10240

/*
 * Maximum number of open files per process.  This is not really a limit
 * for Sprite;  it's merely there for old UNIX programs that expect it.
 */
#define NOFILE 64

/*
 * The maximum number of groups that a process can be in at once
 * (the most stuff ever returned by getgroups).  Note:  this needs
 * to be coordinated with FS_NUM_GROUPS, which it isn't right now.
 */
#define NGROUPS 16

/*
 * Macros for fast min/max.
 */
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))

/*
 * Round up an object of size x to one that's an integral multiple
 * of size y.
 */

#define roundup(x, y)    ((((x) + ((y) -1))/(y))*(y))

/*
 * Miscellanous.
 */
#ifndef NULL
#define NULL    0
#endif /* NULL */

/*
 * Scale factor for scaled integers used to count
 * %cpu time and load averages.
 */
#define FSHIFT  8               /* bits to right of fixed binary point */
#define FSCALE  (1<<FSHIFT)

#endif /* _SYS_PARAM_H */
@


1.14
log
@Added definition of FSCALE. X11R5 needs it.
@
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 * $Header: /sprite/src/lib/include/sys/RCS/param.h,v 1.13 89/07/14 09:15:24 rab Exp Locker: rab $ SPRITE (Berkeley)
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@


1.13
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@*** empty log message ***
@
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 * $Header: /sprite/src/lib/include/sys/RCS/param.h,v 1.12 88/07/22 11:28:07 ouster Exp Locker: rab $ SPRITE (Berkeley)
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#ifndef _PARAM
#define _PARAM
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#endif /* _PARAM */
@


1.12
log
@Added roundup macro.
@
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 * $Header: param.h,v 1.11 88/07/14 18:19:56 ouster Exp $ SPRITE (Berkeley)
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#endif NULL
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#endif _PARAM
@


1.11
log
@Added NGROUPS.
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 * $Header: param.h,v 1.10 88/07/14 09:47:17 ouster Exp $ SPRITE (Berkeley)
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@


1.10
log
@New defines needed by csh.
@
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 * $Header: param.h,v 1.9 88/07/14 08:38:02 ouster Exp $ SPRITE (Berkeley)
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@


1.9
log
@Define NULL if it isn't already defined.
@
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 * $Header: param.h,v 1.8 88/07/02 17:38:22 ouster Exp $ SPRITE (Berkeley)
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@


1.8
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@Typo in last change.
@
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 * $Header: param.h,v 1.7 88/07/02 17:35:27 ouster Exp $ SPRITE (Berkeley)
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1.7
log
@Added dbtob macro.
@
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 * $Header: param.h,v 1.6 88/07/01 15:44:16 ouster Exp $ SPRITE (Berkeley)
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#define dbtob(blocks)
    ((unsigned) (blocks) << 9)
@


1.6
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@Add MAXHOSTNAMELEN.
@
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 * $Header: param.h,v 1.5 88/06/29 14:48:05 ouster Exp $ SPRITE (Berkeley)
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@


1.5
log
@Add ifdefs to prevent files from being included multiple times.
@
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 * $Header: param.h,v 1.4 88/06/27 16:19:52 ouster Exp $ SPRITE (Berkeley)
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@


1.4
log
@Added MIN, MAX definitions.
@
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 * $Header: param.h,v 1.3 88/06/27 16:02:30 ouster Exp $ SPRITE (Berkeley)
@


1.3
log
@Added MAXBSIZE.
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 * $Header: param.h,v 1.2 88/06/27 15:25:51 ouster Exp $ SPRITE (Berkeley)
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@


1.2
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@Added MAXPATHLEN definition.
@
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@d20 1
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 * $Header: param.h,v 1.1 88/06/26 15:56:14 ouster Exp $ SPRITE (Berkeley)
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@


1.1
log
@Initial revision
@
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@d20 1
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 * $Header: proto.h,v 1.2 88/03/11 08:39:40 ouster Exp $ SPRITE (Berkeley)
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@