sysdeps/mach/hurd/sys/param.h

   1 /* Copyright (C) 1993-2012 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, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18 /* This file is deprecated and is provided only for compatibility with
  19    Unix systems.  It is unwise to include this file on programs which
  20    are intended only for GNU systems.
  21
  22    Parts from:
  23
  24  * Copyright (c) 1982, 1986, 1989 The Regents of the University of California.
  25  * All rights reserved.
  26  *
  27  * Redistribution and use in source and binary forms, with or without
  28  * modification, are permitted provided that the following conditions
  29  * are met:
  30  * 1. Redistributions of source code must retain the above copyright
  31  *    notice, this list of conditions and the following disclaimer.
  32  * 2. Redistributions in binary form must reproduce the above copyright
  33  *    notice, this list of conditions and the following disclaimer in the
  34  *    documentation and/or other materials provided with the distribution.
  35  * 4. Neither the name of the University nor the names of its contributors
  36  *    may be used to endorse or promote products derived from this software
  37  *    without specific prior written permission.
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  40  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  42  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  43  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  44  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  45  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  46  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  47  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  48  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  49  * SUCH DAMAGE.
  50  *
  51  *      @(#)param.h     7.23 (Berkeley) 5/6/91
  52  */
  53
  54
  55 #ifndef _SYS_PARAM_H
  56
  57 #define _SYS_PARAM_H    1
  58 #include <features.h>
  59
  60 #define __need_NULL
  61 #include <stddef.h>
  62
  63 #include <sys/types.h>
  64 #include <errno.h>
  65 #include <signal.h>
  66 #include <endian.h>
  67 #include <limits.h>
  68 #ifdef notyet
  69 # include <ufs/param.h>
  70 #endif
  71
  72
  73 /* What versions of BSD we are compatible with.  */
  74 #define BSD     199306          /* System version (year & month). */
  75 #define BSD4_3  1
  76 #define BSD4_4  1
  77
  78 #define GNU     1994100         /* GNU version (year, month, and release).  */
  79
  80
  81 /* BSD names for some <limits.h> values.  We do not define the BSD names
  82    for the values which are not statically limited, such as NOFILE.  */
  83
  84 #define NBBY            CHAR_BIT
  85 #define NGROUPS         NGROUPS_MAX
  86 #define CANBSIZ         MAX_CANON /* XXX ? */
  87
  88 /* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to
  89    compare against some fixed limit.  */
  90 #define NCARGS          INT_MAX
  91
  92 /* There is nothing quite equivalent in GNU to Unix "mounts", but there is
  93    no limit on the number of simultaneously attached filesystems.  */
  94 #define NMOUNT          INT_MAX
  95
  96
  97 /* Magical constants.  */
  98 #define NOGROUP 65535           /* Marker for empty group set member.  */
  99 #define NODEV   ((dev_t) -1)    /* Non-existent device.  */
 100
 101
 102 /* Bit map related macros.  */
 103 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 104 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 105 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 106 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 107
 108 /* Macros for counting and rounding.  */
 109 #ifndef howmany
 110 # define howmany(x, y)  (((x)+((y)-1))/(y))
 111 #endif
 112 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 113 #define powerof2(x)     ((((x)-1)&(x))==0)
 114
 115 /* Macros for min/max.  */
 116 #define MIN(a,b) (((a)<(b))?(a):(b))
 117 #define MAX(a,b) (((a)>(b))?(a):(b))
 118
 119
 120 /* Unit of `st_blocks'.  */
 121 #define DEV_BSIZE       512
 122
 123
 124 /* Scale factor for scaled integers used to count %cpu time and load avgs.
 125
 126    The number of CPU `tick's that map to a unique `%age' can be expressed
 127    by the formula (1 / (2 ^ (FSHIFT - 11))).  The maximum load average that
 128    can be calculated (assuming 32 bits) can be closely approximated using
 129    the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).  */
 130
 131 #define FSHIFT  11              /* Bits to right of fixed binary point.  */
 132 #define FSCALE  (1<<FSHIFT)
 133
 134 #endif   /* sys/param.h */