Include/myselect.h

   1 #ifndef Py_MYSELECT_H
   2 #define Py_MYSELECT_H
   3 #ifdef __cplusplus
   4 extern "C" {
   5 #endif
   6
   7 /***********************************************************
   8 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
   9 The Netherlands.
  10
  11                         All Rights Reserved
  12
  13 Permission to use, copy, modify, and distribute this software and its
  14 documentation for any purpose and without fee is hereby granted,
  15 provided that the above copyright notice appear in all copies and that
  16 both that copyright notice and this permission notice appear in
  17 supporting documentation, and that the names of Stichting Mathematisch
  18 Centrum or CWI not be used in advertising or publicity pertaining to
  19 distribution of the software without specific, written prior permission.
  20
  21 STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
  22 THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
  23 FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
  24 FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  25 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  26 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  27 OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  28
  29 ******************************************************************/
  30
  31 /* Include file for users of select() */
  32
  33 /* NB caller must include <sys/types.h> */
  34
  35 #ifdef HAVE_SYS_SELECT_H
  36
  37 #include <sys/select.h>
  38
  39 #ifdef SYS_SELECT_WITH_SYS_TIME
  40 #include "mytime.h"
  41 #else /* !SYS_SELECT_WITH_SYS_TIME */
  42 #include <time.h>
  43 #endif /* !SYS_SELECT_WITH_SYS_TIME */
  44
  45 #else /* !HAVE_SYS_SELECT_H */
  46
  47 #include "mytime.h"
  48
  49 #endif /* !HAVE_SYS_SELECT_H */
  50
  51 /* If the fd manipulation macros aren't defined,
  52    here is a set that should do the job */
  53
  54 #ifndef FD_SETSIZE
  55 #define FD_SETSIZE      256
  56 #endif
  57
  58 #ifndef FD_SET
  59
  60 typedef long fd_mask;
  61
  62 #define NFDBITS (sizeof(fd_mask) * NBBY)        /* bits per mask */
  63 #ifndef howmany
  64 #define howmany(x, y)   (((x)+((y)-1))/(y))
  65 #endif /* howmany */
  66
  67 typedef struct fd_set {
  68         fd_mask fds_bits[howmany(FD_SETSIZE, NFDBITS)];
  69 } fd_set;
  70
  71 #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1 << ((n) % NFDBITS)))
  72 #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1 << ((n) % NFDBITS)))
  73 #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1 << ((n) % NFDBITS)))
  74 #define FD_ZERO(p)      memset((char *)(p), '\0', sizeof(*(p)))
  75
  76 #endif /* FD_SET */
  77
  78 #ifdef __cplusplus
  79 }
  80 #endif
  81 #endif /* !Py_MYSELECT_H */