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5d4f405d3b
Define FD_SETSIZE (<sys/select.h>) to be 1024 by default, and define NOFILE (<sys/param.h>) to be OPEN_MAX (== 3200) by default. Remove the comment in <sys/select.h> that FD_SETSIZE should be >= NOFILE. Bump API minor. Addresses: https://cygwin.com/pipermail/cygwin/2022-July/251839.html
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/* sys/param.h
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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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#define __need_NULL
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#include <stddef.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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#if !defined NOFILE && defined OPEN_MAX
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# define NOFILE OPEN_MAX
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#endif
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/* Max number of groups; must keep in sync with NGROUPS_MAX in limits.h */
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#define NGROUPS NGROUPS_MAX
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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 (== Win32 MAX_HOSTNAME_LEN) */
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#define MAXHOSTNAMELEN 128
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/* Maximum path length including trailing NUL; the Posix version is PATH_MAX.
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MAXPATHLEN is the BSD variant. */
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#define MAXPATHLEN PATH_MAX
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/* Maximum number of nested symlinks; the Posix version is SYMLOOP_MAX.
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MAXSYMLINKS is the BSD variant. */
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#define MAXSYMLINKS SYMLOOP_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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#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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