sysdeps/mach/hurd/sys/param.h

   1 /* Copyright (C) 1993, 1994, 1995, 1997, 1999 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 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.
   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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    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  * 4. Neither the name of the University nor the names of its contributors
  37  *    may be used to endorse or promote products derived from this software
  38  *    without specific prior written permission.
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  *      @(#)param.h     7.23 (Berkeley) 5/6/91
  53  */
  54
  55
  56 #ifndef _SYS_PARAM_H
  57
  58 #define _SYS_PARAM_H    1
  59 #include <features.h>
  60
  61 #define __need_NULL
  62 #include <stddef.h>
  63
  64 #include <sys/types.h>
  65 #include <errno.h>
  66 #include <signal.h>
  67 #include <endian.h>
  68 #include <limits.h>
  69 #ifdef notyet
  70 # include <ufs/param.h>
  71 #endif
  72
  73
  74 /* What versions of BSD we are compatible with.  */
  75 #define BSD     199306          /* System version (year & month). */
  76 #define BSD4_3  1
  77 #define BSD4_4  1
  78
  79 #define GNU     1994100         /* GNU version (year, month, and release).  */
  80
  81
  82 /* BSD names for some <limits.h> values.  We do not define the BSD names
  83    for the values which are not statically limited, such as NOFILE.  */
  84
  85 #define NBBY            CHAR_BIT
  86 #define NGROUPS         NGROUPS_MAX
  87 #define MAXSYMLINKS     SYMLOOP_MAX
  88 #define CANBSIZ         MAX_CANON /* XXX ? */
  89
  90 /* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to
  91    compare against some fixed limit.  */
  92 #define NCARGS          INT_MAX
  93
  94 /* There is nothing quite equivalent in GNU to Unix "mounts", but there is
  95    no limit on the number of simultaneously attached filesystems.  */
  96 #define NMOUNT          INT_MAX
  97
  98
  99 /* Magical constants.  */
 100 #define NOGROUP 65535           /* Marker for empty group set member.  */
 101 #define NODEV   ((dev_t) -1)    /* Non-existent device.  */
 102
 103
 104 /* Bit map related macros.  */
 105 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 106 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 107 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 108 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 109
 110 /* Macros for counting and rounding.  */
 111 #ifndef howmany
 112 # define howmany(x, y)  (((x)+((y)-1))/(y))
 113 #endif
 114 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 115 #define powerof2(x)     ((((x)-1)&(x))==0)
 116
 117 /* Macros for min/max.  */
 118 #define MIN(a,b) (((a)<(b))?(a):(b))
 119 #define MAX(a,b) (((a)>(b))?(a):(b))
 120
 121
 122 /* Scale factor for scaled integers used to count %cpu time and load avgs.
 123
 124    The number of CPU `tick's that map to a unique `%age' can be expressed
 125    by the formula (1 / (2 ^ (FSHIFT - 11))).  The maximum load average that
 126    can be calculated (assuming 32 bits) can be closely approximated using
 127    the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).  */
 128
 129 #define FSHIFT  11              /* Bits to right of fixed binary point.  */
 130 #define FSCALE  (1<<FSHIFT)
 131
 132 #endif   /* sys/param.h */