81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/* sys/param.h
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Copyright 2001, 2003, 2007 Red Hat, Inc.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _SYS_PARAM_H
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#define _SYS_PARAM_H
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#include <sys/types.h>
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/* Linux includes limits.h, but this is not universally done. */
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#include <limits.h>
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/* Max number of open files. The Posix version is OPEN_MAX. */
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/* Number of fds is virtually unlimited in cygwin, but we must provide
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some reasonable value for Posix conformance */
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#define NOFILE 8192
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/* Max number of groups; must keep in sync with NGROUPS_MAX in limits.h */
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#define NGROUPS 16
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/* Ticks/second for system calls such as times() */
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/* FIXME: is this the appropriate value? */
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#define HZ 1000
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/* Max hostname size that can be dealt with */
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/* FIXME: is this the appropriate value? */
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#define MAXHOSTNAMELEN 64
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/* The Posix version is PATH_MAX. MAXPATHLEN is the BSD variant. */
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#define MAXPATHLEN PATH_MAX
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/* This is the number of bytes per block given in the st_blocks stat member.
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It should be in sync with S_BLKSIZE in sys/stat.h. S_BLKSIZE is the
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BSD variant of this constant. */
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#define DEV_BSIZE 1024
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#if 0 /* defined in endian.h */
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/* Some autoconf'd packages check for endianness. When cross-building we
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can't run programs on the target. Fortunately, autoconf supports the
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definition of byte order in sys/param.h (that's us!).
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The values here are the same as used in gdb/defs.h (are the more
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appropriate values?). */
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#define BIG_ENDIAN 4321
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#define LITTLE_ENDIAN 1234
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/* All known win32 systems are little endian. */
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#define BYTE_ORDER LITTLE_ENDIAN
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#endif
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#ifndef NULL
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#define NULL 0L
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#endif
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#ifndef NBBY
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#define NBBY 8
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#endif
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/* Bit map related macros. */
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#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
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#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
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#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
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#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
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/* Macros for counting and rounding. */
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#ifndef howmany
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#define howmany(x, y) (((x)+((y)-1))/(y))
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#endif
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#define rounddown(x, y) (((x)/(y))*(y))
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#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */
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#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
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#define powerof2(x) ((((x)-1)&(x))==0)
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/* Macros for min/max. */
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#define MIN(a,b) (((a)<(b))?(a):(b))
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#endif
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