Symaptic: os/ossrv/genericopenlibs/openenvcore/include/sys/param.dosc@260cb5ec6c19

     1 /** @file ../include/sys/param.h

     2 @internalComponent

     3 */

     5 /** @def NOFILE

     7 max open files per process

     9 @publishedAll

    10 @externallyDefinedApi

    11 */

    14 /** @def MAXCOMLEN

    16 max command name remembered

    18 @publishedAll

    19 @externallyDefinedApi

    20 */

    23 /** @def MAXINTERP

    25 max interpreter file name length

    27 @publishedAll

    28 @externallyDefinedApi

    29 */

    31 /** @def MAXLOGNAME

    33 max login name length (incl. NUL)

    35 @publishedAll

    36 @externallyDefinedApi

    37 */

    39 /** @def MAXUPRC

    41 max simultaneous processes

    43 @publishedAll

    44 @externallyDefinedApi

    45 */

    48 /** @def NCARGS

    50 max bytes for an exec function

    52 @publishedAll

    53 @externallyDefinedApi

    54 */

    56 /** @def NGROUPS

    58 max number groups

    60 @publishedAll

    61 @externallyDefinedApi

    62 */

    65 /** @def NOFILE

    67 max open files per process

    69 @publishedAll

    70 @externallyDefinedApi

    71 */

    74 /** @def NOGROUP

    76 marker for empty group set member

    78 @publishedAll

    79 @externallyDefinedApi

    80 */

    82 /** @def MAXHOSTNAMELEN

    84 max hostname size

    86 @publishedAll

    87 @externallyDefinedApi

    88 */

    90 /** @def SPECNAMELEN

    92 max length of devicename

    94 @publishedAll

    95 @externallyDefinedApi

    96 */

    98 /** @def DEV_BSHIFT

   100 log2(DEV_BSIZE)

   102 @publishedAll

   103 @externallyDefinedApi

   104 */

   106 /** @def DEV_BSIZE

   108 (1<<DEV_BSHIFT)

   110 @publishedAll

   111 @externallyDefinedApi

   112 */

   114 /** @def BLKDEV_IOSIZE

   116 default block device I/O size

   118 @publishedAll

   119 @externallyDefinedApi

   120 */

   122 /** @def DFLTPHYS

   124 default max raw IO transfer size

   126 @publishedAll

   127 @externallyDefinedApi

   128 */

   130 /** @def MAXPHYS

   132 max raw IO transfer size

   134 @publishedAll

   135 @externallyDefinedApi

   136 */

   138 /** @def MAXDUMPPGS

   140 (DFLTPHYS by PAGE_SIZE)

   142 @publishedAll

   143 @externallyDefinedApi

   144 */

   147 /** @def MSIZE

   149 size of an mbuf

   151 @publishedAll

   152 @externallyDefinedApi

   153 */

   155 /** @def ctob(x)

   157 clicks to bytes

   159 @publishedAll

   160 @externallyDefinedApi

   161 */

   164 /** @def btoc(x)

   166 bytes to clicks

   168 @publishedAll

   169 @externallyDefinedApi

   170 */

   172 /** @def btodb(bytes)

   174 calculates (bytes by DEV_BSIZE)

   176 @publishedAll

   177 @externallyDefinedApi

   178 */

   180 /** @def dbtob(db)

   182 calculates (db)(DEV_BSIZE)

   184 @publishedAll

   185 @externallyDefinedApi

   186 */

   189 /** @def PRIMASK

   191 Primary mask

   193 @publishedAll

   194 @externallyDefinedApi

   195 */

   197 /** @def PCATCH

   199 ORd with pri for tsleep to check signals

   201 @publishedAll

   202 @externallyDefinedApi

   203 */

   205 /** @def PDROP

   207 ORd with pri to stop re-entry of interlock mutex

   209 @publishedAll

   210 @externallyDefinedApi

   211 */

   214 /** @def NZERO

   216 default "nice"

   218 @publishedAll

   219 @externallyDefinedApi

   220 */

   223 /** @def NBBY

   225 number of bits in a byte

   227 @publishedAll

   228 @externallyDefinedApi

   229 */

   232 /** @def NBPW

   234 number of bytes per word (integer)

   236 @publishedAll

   237 @externallyDefinedApi

   238 */

   241 /** @def CMASK

   243 default file mask: S_IWGRP OR S_IWOTH

   245 @publishedAll

   246 @externallyDefinedApi

   247 */

   250 /** @def NODEV

   252 non-existent device

   254 @publishedAll

   255 @externallyDefinedApi

   256 */

   259 /** @def CBLOCK

   261 Clist block size, must be a power of 2.

   263 @publishedAll

   264 @externallyDefinedApi

   265 */

   269 /** @def CBQSIZE

   271 Quote bytes or cblock

   273 @publishedAll

   274 @externallyDefinedApi

   275 */

   277 /** @def CBSIZE

   279 Data chars or clist

   281 @publishedAll

   282 @externallyDefinedApi

   283 */

   286 /** @def CROUND

   288 Clist rounding.

   290 @publishedAll

   291 @externallyDefinedApi

   292 */

   294 /** @def MAXBSIZE

   296 Filesystems are made out of blocks of at most MAXBSIZE bytes per block.

   297 MAXBSIZE may be made larger without effecting any existing filesystems as long as it does not exceed MAXPHYS, and may be made smaller at the risk of not being able to use filesystems which require a block size exceeding MAXBSIZE.

   299 @publishedAll

   300 @externallyDefinedApi

   301 */

   303 /** @def BKVASIZE

   305 Nominal buffer space per buffer, in bytes.  BKVASIZE is the minimum KVM memory reservation the kernel is willing to make.

   306 Filesystems can of course request smaller chunks.  Actual  backing memory uses a chunk size of a page (PAGE_SIZE).

   308 @publishedAll

   309 @externallyDefinedApi

   310 */

   312 /** @def BKVAMASK

   314 File system parameter and macros

   316 @publishedAll

   317 @externallyDefinedApi

   318 */

   321 /** @def MAXPATHLEN

   323 MAXPATHLEN defines the longest permissible path length after expanding symbolic links.

   324 It is used to allocate a temporary buffer from the buffer pool in which to do the name expansion, hence should be a power of two,and must be less than or equal to MAXBSIZE.

   326 @publishedAll

   327 @externallyDefinedApi

   328 */

   330 /** @def MAXSYMLINKS

   332 Maximum number of symbolic links that may be expanded in a path name.

   333 It should be set high enough to allow all legitimate uses, but halt infinite loops reasonably quickly.

   335 @publishedAll

   336 @externallyDefinedApi

   337 */

   339 /** @def howmany(x, y)

   341 Macros for counting and rounding.

   343 @publishedAll

   344 @externallyDefinedApi

   345 */

   348 /** @def rounddown(x, y)

   350 Macros for counting and rounding.

   352 @publishedAll

   353 @released

   354 */

   356 /** @def roundup(x, y)

   358 Macros for counting and rounding.

   360 @publishedAll

   361 @released

   362 */

   365 /** @def roundup2(x, y)

   367 Macros for counting and rounding.

   369 @publishedAll

   370 @released

   371 */

   374 /** @def powerof2(x)

   376 Macros for counting and rounding.

   378 @publishedAll

   379 @externallyDefinedApi

   380 */

   383 /** @def MIN(a,b)

   385 Macros for min or max.

   387 @publishedAll

   388 @externallyDefinedApi

   389 */

   392 /** @def MAX(a,b)

   394 Macros for min or max.

   396 @publishedAll

   397 @externallyDefinedApi

   398 */

   402 /** @def MINBUCKET

   404 min allocation of 32 bytes or 16 bytes

   406 @publishedAll

   407 @externallyDefinedApi

   408 */

   411 /** @def MAXALLOCSAVE

   413 (2)(PAGE_SIZE)

   415 @publishedAll

   416 @externallyDefinedApi

   417 */

   419 /** @def FSHIFT

   421 bits to right of fixed binary point

   423 @publishedAll

   424 @externallyDefinedApi

   425 */

   427 /** @def FSCALE

   429 bits to right 1 shift

   431 @publishedAll

   432 @externallyDefinedApi

   433 */

author	sl
	Tue, 10 Jun 2014 14:32:02 +0200
changeset 1	260cb5ec6c19
permissions	-rw-r--r--