mirror of https://github.com/python/cpython
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
#ifndef Py_MYSELECT_H
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#define Py_MYSELECT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***********************************************************
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Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Include file for users of select() */
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/* NB caller must include <sys/types.h> */
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#ifdef SYS_SELECT_WITH_SYS_TIME
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#include "mytime.h"
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#else /* !SYS_SELECT_WITH_SYS_TIME */
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#include <time.h>
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#endif /* !SYS_SELECT_WITH_SYS_TIME */
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#else /* !HAVE_SYS_SELECT_H */
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#include "mytime.h"
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#endif /* !HAVE_SYS_SELECT_H */
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/* If the fd manipulation macros aren't defined,
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here is a set that should do the job */
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#ifndef FD_SETSIZE
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#define FD_SETSIZE 256
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#endif
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#ifndef FD_SET
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typedef long fd_mask;
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#define NFDBITS (sizeof(fd_mask) * NBBY) /* bits per mask */
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#ifndef howmany
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#define howmany(x, y) (((x)+((y)-1))/(y))
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#endif /* howmany */
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typedef struct fd_set {
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fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
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} fd_set;
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#define FD_SET(n, p) ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
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#define FD_CLR(n, p) ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
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#define FD_ISSET(n, p) ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
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#define FD_ZERO(p) memset((char *)(p), '\0', sizeof(*(p)))
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#endif /* FD_SET */
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_MYSELECT_H */
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