compiler/clib/include/sys/param.h

   1 #ifndef _SYS_PARAM_H_
   2 #define _SYS_PARAM_H_
   3 /*
   4     Copyright © 1995-2002, The AROS Development Team. All rights reserved.
   5     $Id$
   6
   7     sys/param.h header file.
   8
   9     Derived from FreeBSD since it is a BSD header, and SUSv2 doesn't
  10     mention it at all.
  11
  12     Many of these things are Unix kernel or just plain BSD specific, and as
  13     such have been left out.
  14 */
  15
  16 #include <sys/types.h>
  17 #include <limits.h>
  18
  19 #define MAXCOMLEN       19          /* max command name remembered */
  20 #define MAXINTERP       32          /* max interpreter file name length */
  21 #define MAXLOGNAME      17          /* max login name length */
  22 #define NGROUPS         16          /* max number groups */
  23 #define NOFILE          64          /* max open files per process */
  24 #define MAXHOSTNAMELEN  256         /* max hostname size */
  25
  26 /* Others:
  27     MAXUPRC, NCARGS, NOGROUP, SPECNAMELEN
  28 */
  29
  30 #define MAXPATHLEN      PATH_MAX    /* max path after symlink deref */
  31 #define MAXSYMLINKS     32          /* max no of symlinks */
  32
  33 /* Others:
  34     ARG_MAX, CHILD_MAX, LINK_MAX, MAX_CANON, MAX_INPUT,
  35     PIPE_BUF, COLL_WEIGHTS_MAX, EXPR_NEST_MAX, RE_DUP_MAX
  36
  37     For bc(1):
  38         BC_BASE_MAX, BC_DIM_MAX, BC_SCALE_MAX, BC_STRING_MAX
  39 */
  40
  41 /* From <machine/param.h>:
  42
  43     Most of these have a problem in that we have no useful way of
  44     defining them. Although, since most of these are too Unix specific
  45     for most well behaved AROS software, I will leave them undefined until
  46     somebody really needs them.
  47
  48     MACHINE, MACHINE_ARCH, MAXCPU,
  49
  50     PAGE_SHIFT, PAGE_SIZE, PAGE_MASK, NPTEPG, NPDEPG, PDRSHIFT,
  51     NBPDR, PDRMASK,
  52
  53     DEV_BSHIFT, DEV_BSIZE,
  54
  55     BLKDEV_IOSIZE, DFLTPHYS, MAXPHYS, MAXDUMPPGS
  56
  57     IOPAGES, KSTACK_PAGES, UAREA_PAGES, KSTACK_GUARD
  58
  59     MBSIZE, MCLSHIFT, MCLBYTES
  60
  61     ctob(), btoc(), trunc_page(), round_page(), atop(), ptoa(),
  62     btop(), ptob(), pgtok()
  63 */
  64
  65 /* BSD typically includes <machine/limits.h> here, which is <limits.h> */
  66
  67 /* Back to <sys/param.h> */
  68 #define NBPW    sizeof (int)    /* number of bytes per word (integer) */
  69 #define CMASK   022             /* default file mask: S_IWGRP|S_OWOTH */
  70 #define NODEV   (dev_t)(-1)     /* non-existent device */
  71
  72 /* Others:
  73     PRIMASK, PCATCH, PDROP, NZERO, CBLOCK, CBQSIZE, CBSIZE, CROUND
  74     MAXBSIZE, BKVASIZE, BKVAMASK, MAXFRAG,
  75
  76     setbit(), clrbit(), isset(), isclr(),
  77     howmany(), rounddown(), roundup(), roundup2(), powerof2()
  78
  79     <sys/param.h> unconditionally defines MIN(), MAX().
  80 */
  81
  82 /* Macros for counting and rounding. */
  83 #ifndef howmany
  84 #define howmany(x, y)   (((x)+((y)-1))/(y))
  85 #endif
  86 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
  87 #define powerof2(x)     ((((x)-1)&(x))==0)
  88
  89 #ifndef MIN
  90 #define MIN(x,y) ((x) < (y) ? (x) : (y))
  91 #endif
  92 #ifndef MAX
  93 #define MAX(x,y) ((x) > (y) ? (x) : (y))
  94 #endif
  95
  96 /* Others:
  97     MINBUCKET, MAXALLOCSAVE, FSHIFT, FSCALE, dbtoc(), ctodb()
  98 */
  99
 100 #endif /* _SYS_PARAM_H_ */