sysdeps/mach/hurd/sys/param.h

   1 /* Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 /* This file is deprecated and is provided only for compatibility with
  20    Unix systems.  It is unwise to include this file on programs which
  21    are intended only for GNU systems.
  22
  23    Parts from:
  24
  25  * Copyright (c) 1982, 1986, 1989 The Regents of the University of California.
  26  * All rights reserved.
  27  *
  28  * Redistribution and use in source and binary forms, with or without
  29  * modification, are permitted provided that the following conditions
  30  * are met:
  31  * 1. Redistributions of source code must retain the above copyright
  32  *    notice, this list of conditions and the following disclaimer.
  33  * 2. Redistributions in binary form must reproduce the above copyright
  34  *    notice, this list of conditions and the following disclaimer in the
  35  *    documentation and/or other materials provided with the distribution.
  36  * 3. All advertising materials mentioning features or use of this software
  37  *    must display the following acknowledgement:
  38  *      This product includes software developed by the University of
  39  *      California, Berkeley and its contributors.
  40  * 4. Neither the name of the University nor the names of its contributors
  41  *    may be used to endorse or promote products derived from this software
  42  *    without specific prior written permission.
  43  *
  44  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  45  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  46  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  47  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  48  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  49  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  50  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  51  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  52  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  53  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  54  * SUCH DAMAGE.
  55  *
  56  *      @(#)param.h     7.23 (Berkeley) 5/6/91
  57  */
  58
  59
  60 #ifndef _SYS_PARAM_H
  61
  62 #define _SYS_PARAM_H    1
  63 #include <features.h>
  64
  65 #define __need_NULL
  66 #include <stddef.h>
  67
  68 #include <sys/types.h>
  69 #include <errno.h>
  70 #include <signal.h>
  71 #include <endian.h>
  72 #include <limits.h>
  73 #ifdef notyet
  74 # include <ufs/param.h>
  75 #endif
  76
  77
  78 /* What versions of BSD we are compatible with.  */
  79 #define BSD     199306          /* System version (year & month). */
  80 #define BSD4_3  1
  81 #define BSD4_4  1
  82
  83 #define GNU     1994100         /* GNU version (year, month, and release).  */
  84
  85
  86 /* BSD names for some <limits.h> values.  We do not define the BSD names
  87    for the values which are not statically limited, such as NOFILE.  */
  88
  89 #define NBBY            CHAR_BIT
  90 #define NGROUPS         NGROUPS_MAX
  91 #define MAXSYMLINKS     SYMLOOP_MAX
  92 #define CANBSIZ         MAX_CANON /* XXX ? */
  93
  94 /* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to
  95    compare against some fixed limit.  */
  96 #define NCARGS          INT_MAX
  97
  98 /* There is nothing quite equivalent in GNU to Unix "mounts", but there is
  99    no limit on the number of simultaneously attached filesystems.  */
 100 #define NMOUNT          INT_MAX
 101
 102
 103 /* Magical constants.  */
 104 #define NOGROUP 65535           /* Marker for empty group set member.  */
 105 #define NODEV   ((dev_t) -1)    /* Non-existent device.  */
 106
 107
 108 /* Bit map related macros.  */
 109 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 110 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 111 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 112 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 113
 114 /* Macros for counting and rounding.  */
 115 #ifndef howmany
 116 # define howmany(x, y)  (((x)+((y)-1))/(y))
 117 #endif
 118 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 119 #define powerof2(x)     ((((x)-1)&(x))==0)
 120
 121 /* Macros for min/max.  */
 122 #define MIN(a,b) (((a)<(b))?(a):(b))
 123 #define MAX(a,b) (((a)>(b))?(a):(b))
 124
 125
 126 /* Scale factor for scaled integers used to count %cpu time and load avgs.
 127
 128    The number of CPU `tick's that map to a unique `%age' can be expressed
 129    by the formula (1 / (2 ^ (FSHIFT - 11))).  The maximum load average that
 130    can be calculated (assuming 32 bits) can be closely approximated using
 131    the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).  */
 132
 133 #define FSHIFT  11              /* Bits to right of fixed binary point.  */
 134 #define FSCALE  (1<<FSHIFT)
 135
 136 #endif   /* sys/param.h */