include/sys/param.h

   1 #ifndef _SYS_PARAM_H_
   2 #define _SYS_PARAM_H_
   3
   4 /*
   5  * Historic BSD #defines -- probably will remain untouched for all time.
   6  */
   7 #define BSD     199506          /* System version (year & month). */
   8 #define BSD4_3  1
   9 #ifndef __minix
  10 #define BSD4_4  1
  11 #endif
  12
  13 /*
  14  *      #define __NetBSD_Version__ MMmmrrpp00
  15  *
  16  *      M = major version
  17  *      m = minor version; a minor number of 99 indicates current.
  18  *      r = 0 (*)
  19  *      p = patchlevel
  20  *
  21  * When new releases are made, src/gnu/usr.bin/groff/tmac/mdoc.local
  22  * needs to be updated and the changes sent back to the groff maintainers.
  23  *
  24  * (*)  Up to 2.0I "release" used to be "",A-Z,Z[A-Z] but numeric
  25  *              e.g. NetBSD-1.2D  = 102040000 ('D' == 4)
  26  *      NetBSD-2.0H     (200080000) was changed on 20041001 to:
  27  *      2.99.9          (299000900)
  28  */
  29
  30 #define __NetBSD_Version__      599002900       /* NetBSD 5.99.29 */
  31
  32 #define __NetBSD_Prereq__(M,m,p) (((((M) * 100000000) + \
  33     (m) * 1000000) + (p) * 100) <= __NetBSD_Version__)
  34
  35 /*
  36  * Historical NetBSD #define
  37  *
  38  * NetBSD 1.4 was the last release for which this value was incremented.
  39  * The value is now permanently fixed at 199905. It will never be
  40  * changed again.
  41  *
  42  * New code must use __NetBSD_Version__ instead, and should not even
  43  * count on NetBSD being defined.
  44  *
  45  */
  46
  47 #define NetBSD  199905          /* NetBSD version (year & month). */
  48
  49 #include <sys/null.h>
  50
  51 #ifndef __ASSEMBLER__
  52 #include <sys/inttypes.h>
  53 #include <sys/types.h>
  54
  55 /*
  56  * Machine-independent constants (some used in following include files).
  57  * Redefined constants are from POSIX 1003.1 limits file.
  58  *
  59  * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
  60  * MAXHOSTNAMELEN should be >= (_POSIX_HOST_NAME_MAX + 1) (see <limits.h>)
  61  * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
  62  */
  63 #include <sys/syslimits.h>
  64
  65
  66 #define MAXCOMLEN       16              /* max command name remembered */
  67 #define MAXINTERP       PATH_MAX        /* max interpreter file name length */
  68 /* DEPRECATED: use LOGIN_NAME_MAX instead. */
  69 #define MAXLOGNAME      (LOGIN_NAME_MAX - 1) /* max login name length */
  70 #ifndef __minix
  71 #define NCARGS          ARG_MAX         /* max bytes for an exec function */
  72 #endif
  73 #define NGROUPS         NGROUPS_MAX     /* max number groups */
  74 #define NOGROUP         65535           /* marker for empty group set member */
  75
  76 #define MAXHOSTNAMELEN  256             /* max hostname size */
  77
  78 #ifndef NOFILE
  79 #define NOFILE          OPEN_MAX        /* max open files per process */
  80 #endif
  81 #ifndef MAXUPRC                         /* max simultaneous processes */
  82 #define MAXUPRC         CHILD_MAX       /* POSIX 1003.1-compliant default */
  83 #else
  84 #if (MAXUPRC - 0) < CHILD_MAX
  85 #error MAXUPRC less than CHILD_MAX.  See options(4) for details.
  86 #endif /* (MAXUPRC - 0) < CHILD_MAX */
  87 #endif /* !defined(MAXUPRC) */
  88
  89 /* Signals. */
  90 #include <sys/signal.h>
  91
  92 /* Machine type dependent parameters. */
  93 #include <machine/param.h>
  94 #include <machine/limits.h>
  95
  96 /* pages ("clicks") to disk blocks */
  97 #define ctod(x)         ((x) << (PGSHIFT - DEV_BSHIFT))
  98 #define dtoc(x)         ((x) >> (PGSHIFT - DEV_BSHIFT))
  99
 100 /* bytes to pages */
 101 #define ctob(x)         ((x) << PGSHIFT)
 102 #define btoc(x)         (((x) + PGOFSET) >> PGSHIFT)
 103
 104 /* bytes to disk blocks */
 105 #define dbtob(x)        ((x) << DEV_BSHIFT)
 106 #define btodb(x)        ((x) >> DEV_BSHIFT)
 107
 108 #ifndef COHERENCY_UNIT
 109 #define COHERENCY_UNIT          64
 110 #endif
 111 #ifndef CACHE_LINE_SIZE
 112 #define CACHE_LINE_SIZE         64
 113 #endif
 114 #ifndef MAXCPUS
 115 #define MAXCPUS                 32
 116 #endif
 117 #ifndef MAX_LWP_PER_PROC
 118 #define MAX_LWP_PER_PROC        8000
 119 #endif
 120
 121 /*
 122  * Miscellaneous.
 123  */
 124 #define NBPW    sizeof(int)     /* number of bytes per word (integer) */
 125
 126 #define CMASK   022             /* default file mask: S_IWGRP|S_IWOTH */
 127 #define NODEV   (dev_t)(-1)     /* non-existent device */
 128
 129 #define CBLOCK  64              /* Clist block size, must be a power of 2. */
 130 #define CBQSIZE (CBLOCK/NBBY)   /* Quote bytes/cblock - can do better. */
 131                                 /* Data chars/clist. */
 132 #define CBSIZE  (CBLOCK - (int)sizeof(struct cblock *) - CBQSIZE)
 133 #define CROUND  (CBLOCK - 1)    /* Clist rounding. */
 134
 135 /*
 136  * File system parameters and macros.
 137  *
 138  * The file system is made out of blocks of at most MAXBSIZE units, with
 139  * smaller units (fragments) only in the last direct block.  MAXBSIZE
 140  * primarily determines the size of buffers in the buffer pool.  It may be
 141  * made larger without any effect on existing file systems; however making
 142  * it smaller may make some file systems unmountable.
 143  */
 144 #ifndef MAXBSIZE                                /* XXX */
 145 #define MAXBSIZE        MAXPHYS
 146 #endif
 147 #define MAXFRAG         8
 148
 149 /*
 150  * MAXPATHLEN defines the longest permissible path length after expanding
 151  * symbolic links. It is used to allocate a temporary buffer from the buffer
 152  * pool in which to do the name expansion, hence should be a power of two,
 153  * and must be less than or equal to MAXBSIZE.  MAXSYMLINKS defines the
 154  * maximum number of symbolic links that may be expanded in a path name.
 155  * It should be set high enough to allow all legitimate uses, but halt
 156  * infinite loops reasonably quickly.
 157  *
 158  * MAXSYMLINKS should be >= _POSIX_SYMLOOP_MAX (see <limits.h>)
 159  */
 160 #define MAXPATHLEN      PATH_MAX
 161 #define MAXSYMLINKS     32
 162
 163 /* Bit map related macros. */
 164 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
 165 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
 166 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
 167 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
 168
 169 /* Macros for counting and rounding. */
 170 #ifndef howmany
 171 #define howmany(x, y)   (((x)+((y)-1))/(y))
 172 #endif
 173 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 174 #define rounddown(x,y)  (((x)/(y))*(y))
 175 #define roundup2(x, m)  (((x) + (m) - 1) & ~((m) - 1))
 176 #define powerof2(x)     ((((x)-1)&(x))==0)
 177
 178 /* Macros for min/max. */
 179 #define MIN(a,b)        ((/*CONSTCOND*/(a)<(b))?(a):(b))
 180 #define MAX(a,b)        ((/*CONSTCOND*/(a)>(b))?(a):(b))
 181
 182 #endif /* !__ASSEMBLER__ */
 183
 184 #endif /* !_SYS_PARAM_H_ */