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Diffstat (limited to 'StdLib/Include/sys/param.h')
| -rw-r--r-- | StdLib/Include/sys/param.h | 321 |
1 files changed, 321 insertions, 0 deletions
diff --git a/StdLib/Include/sys/param.h b/StdLib/Include/sys/param.h new file mode 100644 index 0000000000..19de391a9f --- /dev/null +++ b/StdLib/Include/sys/param.h @@ -0,0 +1,321 @@ +/* $NetBSD: param.h,v 1.244.2.9.2.2 2008/10/05 08:44:03 bouyer Exp $ */
+
+/*-
+ * Copyright (c) 1982, 1986, 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)param.h 8.3 (Berkeley) 4/4/95
+ */
+
+#ifndef _SYS_PARAM_H_
+#define _SYS_PARAM_H_
+
+/*
+ * Historic BSD #defines -- probably will remain untouched for all time.
+ */
+#define BSD 199506 /* System version (year & month). */
+#define BSD4_3 1
+#define BSD4_4 1
+
+/*
+ * #define __NetBSD_Version__ MMmmrrpp00
+ *
+ * M = major version
+ * m = minor version; a minor number of 99 indicates current.
+ * r = 0 (*)
+ * p = patchlevel
+ *
+ * When new releases are made, src/gnu/usr.bin/groff/tmac/mdoc.local
+ * needs to be updated and the changes sent back to the groff maintainers.
+ *
+ * (*) Up to 2.0I "release" used to be "",A-Z,Z[A-Z] but numeric
+ * e.g. NetBSD-1.2D = 102040000 ('D' == 4)
+ * NetBSD-2.0H (200080000) was changed on 20041001 to:
+ * 2.99.9 (299000900)
+ */
+
+#define __NetBSD_Version__ 400000003 /* NetBSD 4.0.1 */
+
+#define __NetBSD_Prereq__(M,m,p) (((((M) * 100000000) + \
+ (m) * 1000000) + (p) * 100) <= __NetBSD_Version__)
+
+/*
+ * Historical NetBSD #define
+ *
+ * NetBSD 1.4 was the last release for which this value was incremented.
+ * The value is now permanently fixed at 199905. It will never be
+ * changed again.
+ *
+ * New code must use __NetBSD_Version__ instead, and should not even
+ * count on NetBSD being defined.
+ *
+ */
+
+#define NetBSD 199905 /* NetBSD version (year & month). */
+
+#ifndef _LOCORE
+//#include <sys/inttypes.h>
+#include <sys/types.h>
+#endif
+
+/*
+ * Machine-independent constants (some used in following include files).
+ * Redefined constants are from POSIX 1003.1 limits file.
+ *
+ * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>)
+ * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>)
+ */
+#include <sys/syslimits.h>
+
+#define MAXCOMLEN 16 /* max command name remembered */
+#define MAXINTERP PATH_MAX /* max interpreter file name length */
+/* DEPRECATED: use LOGIN_NAME_MAX instead. */
+#define MAXLOGNAME (LOGIN_NAME_MAX - 1) /* max login name length */
+#define NCARGS ARG_MAX /* max bytes for an exec function */
+#define NGROUPS NGROUPS_MAX /* max number groups */
+#define NOGROUP 65535 /* marker for empty group set member */
+#define MAXHOSTNAMELEN 256 /* max hostname size */
+
+#ifndef NOFILE
+#define NOFILE OPEN_MAX /* max open files per process */
+#endif
+#ifndef MAXUPRC /* max simultaneous processes */
+#define MAXUPRC CHILD_MAX /* POSIX 1003.1-compliant default */
+#else
+#if (MAXUPRC - 0) < CHILD_MAX
+#error MAXUPRC less than CHILD_MAX. See options(4) for details.
+#endif /* (MAXUPRC - 0) < CHILD_MAX */
+#endif /* !defined(MAXUPRC) */
+
+/* Signals. */
+#include <sys/signal.h>
+
+/* Machine type dependent parameters. */
+#include <machine/param.h>
+#include <machine/limits.h>
+
+/* pages ("clicks") to disk blocks */
+#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
+#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
+
+/* bytes to pages */
+#define ctob(x) ((x) << PGSHIFT)
+#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
+
+/* bytes to disk blocks */
+#define dbtob(x) ((x) << DEV_BSHIFT)
+#define btodb(x) ((x) >> DEV_BSHIFT)
+
+/*
+ * Stack macros. On most architectures, the stack grows down,
+ * towards lower addresses; it is the rare architecture where
+ * it grows up, towards higher addresses.
+ *
+ * STACK_GROW and STACK_SHRINK adjust a stack pointer by some
+ * size, no questions asked. STACK_ALIGN aligns a stack pointer.
+ *
+ * STACK_ALLOC returns a pointer to allocated stack space of
+ * some size; given such a pointer and a size, STACK_MAX gives
+ * the maximum (in the "maxsaddr" sense) stack address of the
+ * allocated memory.
+ */
+#if defined(_KERNEL) || defined(__EXPOSE_STACK)
+#ifdef __MACHINE_STACK_GROWS_UP
+#define STACK_GROW(sp, _size) (((caddr_t)(sp)) + (_size))
+#define STACK_SHRINK(sp, _size) (((caddr_t)(sp)) - (_size))
+#define STACK_ALIGN(sp, bytes) \
+ ((caddr_t)((((unsigned long)(sp)) + (bytes)) & ~(bytes)))
+#define STACK_ALLOC(sp, _size) ((caddr_t)(sp))
+#define STACK_MAX(p, _size) (((caddr_t)(p)) + (_size))
+#else
+#define STACK_GROW(sp, _size) (((caddr_t)(sp)) - (_size))
+#define STACK_SHRINK(sp, _size) (((caddr_t)(sp)) + (_size))
+#define STACK_ALIGN(sp, bytes) \
+ ((caddr_t)(((unsigned long)(sp)) & ~(bytes)))
+#define STACK_ALLOC(sp, _size) (((caddr_t)(sp)) - (_size))
+#define STACK_MAX(p, _size) ((caddr_t)(p))
+#endif
+#endif /* defined(_KERNEL) || defined(__EXPOSE_STACK) */
+
+/*
+ * Priorities. Note that with 32 run queues, differences less than 4 are
+ * insignificant.
+ */
+#define PSWP 0
+#define PVM 4
+#define PINOD 8
+#define PRIBIO 16
+#define PVFS 20
+#define PZERO 22 /* No longer magic, shouldn't be here. XXX */
+#define PSOCK 24
+#define PWAIT 32
+#define PLOCK 36
+#define PPAUSE 40
+#define PUSER 50
+#define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */
+
+#define PRIMASK 0x0ff
+#define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */
+#define PNORELOCK 0x200 /* OR'd with pri for cond_wait() to not relock
+ the interlock */
+#define PNOEXITERR 0x400 /* OR'd with pri for tsleep to not exit
+ with an error code when LWPs are exiting */
+#define NBPW sizeof(int) /* number of bytes per word (integer) */
+
+#define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */
+#define NODEV (dev_t)(-1) /* non-existent device */
+
+#define CBLOCK 64 /* Clist block size, must be a power of 2. */
+#define CBQSIZE (CBLOCK/NBBY) /* Quote bytes/cblock - can do better. */
+ /* Data chars/clist. */
+#define CBSIZE (CBLOCK - (int)sizeof(struct cblock *) - CBQSIZE)
+#define CROUND (CBLOCK - 1) /* Clist rounding. */
+
+/*
+ * File system parameters and macros.
+ *
+ * The file system is made out of blocks of at most MAXBSIZE units, with
+ * smaller units (fragments) only in the last direct block. MAXBSIZE
+ * primarily determines the size of buffers in the buffer pool. It may be
+ * made larger without any effect on existing file systems; however making
+ * it smaller may make some file systems unmountable.
+ */
+#ifndef MAXBSIZE /* XXX */
+#define MAXBSIZE MAXPHYS
+#endif
+#define MAXFRAG 8
+
+/*
+ * MAXPATHLEN defines the longest permissible path length after expanding
+ * symbolic links. 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. MAXSYMLINKS defines the
+ * maximum number of symbolic links that may be expanded in a path name.
+ * It should be set high enough to allow all legitimate uses, but halt
+ * infinite loops reasonably quickly.
+ */
+#define MAXPATHLEN PATH_MAX
+#define MAXSYMLINKS 32
+
+/* Bit map related macros. */
+#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
+#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
+#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
+#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
+
+/* Macros for counting and rounding. */
+#ifndef howmany
+#define howmany(x, y) (((x)+((y)-1))/(y))
+#endif
+#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
+#define rounddown(x,y) (((x)/(y))*(y))
+#define powerof2(x) ((((x)-1)&(x))==0)
+
+///* Macros for min/max. */
+//#define MIN(a,b) (((a)<(b))?(a):(b))
+//#define MAX(a,b) (((a)>(b))?(a):(b))
+
+/*
+ * Constants for setting the parameters of the kernel memory allocator.
+ *
+ * 2 ** MINBUCKET is the smallest unit of memory that will be
+ * allocated. It must be at least large enough to hold a pointer.
+ *
+ * Units of memory less or equal to MAXALLOCSAVE will permanently
+ * allocate physical memory; requests for these size pieces of
+ * memory are quite fast. Allocations greater than MAXALLOCSAVE must
+ * always allocate and free physical memory; requests for these
+ * size allocations should be done infrequently as they will be slow.
+ *
+ * Constraints: NBPG <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and
+ * MAXALLOCSAVE must be a power of two.
+ */
+#ifdef _LP64
+#define MINBUCKET 5 /* 5 => min allocation of 32 bytes */
+#else
+#define MINBUCKET 4 /* 4 => min allocation of 16 bytes */
+#endif
+#define MAXALLOCSAVE (2 * NBPG)
+
+/*
+ * Scale factor for scaled integers used to count %cpu time and load avgs.
+ *
+ * The number of CPU `tick's that map to a unique `%age' can be expressed
+ * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that
+ * can be calculated (assuming 32 bits) can be closely approximated using
+ * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15).
+ *
+ * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age',
+ * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024.
+ */
+#define FSHIFT 11 /* bits to right of fixed binary point */
+#define FSCALE (1<<FSHIFT)
+
+/*
+ * The time for a process to be blocked before being very swappable.
+ * This is a number of seconds which the system takes as being a non-trivial
+ * amount of real time. You probably shouldn't change this;
+ * it is used in subtle ways (fractions and multiples of it are, that is, like
+ * half of a ``long time'', almost a long time, etc.)
+ * It is related to human patience and other factors which don't really
+ * change over time.
+ */
+#define MAXSLP 20
+
+/*
+ * Defaults for Unified Buffer Cache parameters.
+ * These may be overridden in <machine/param.h>.
+ */
+
+#ifndef UBC_WINSHIFT
+#define UBC_WINSHIFT 13
+#endif
+#ifndef UBC_NWINS
+#define UBC_NWINS 1024
+#endif
+
+#ifdef _KERNEL
+/*
+ * macro to convert from milliseconds to hz without integer overflow
+ * Default version using only 32bits arithmetics.
+ * 64bit port can define 64bit version in their <machine/param.h>
+ * 0x20000 is safe for hz < 20000
+ */
+#ifndef mstohz
+#define mstohz(ms) \
+ (__predict_false((ms) >= 0x20000) ? \
+ ((ms +0u) / 1000u) * hz : \
+ ((ms +0u) * hz) / 1000u)
+#endif
+#endif /* _KERNEL */
+
+#endif /* !_SYS_PARAM_H_ */
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