select.h

Macros

FD_CLR            X
FD_ISSET          X
FD_SET            X
FD_SETSIZE        X
FD_ZERO           X
NFDBITS           X
_SYS_SELECT_H_    X

struct's

fd_set            X

typedef's

fd_mask           X
fd_set            X

   1: /*-
   2:  * Copyright (c) 1992, 1993
   3:  *	The Regents of the University of California.  All rights reserved.
   4:  *
   5:  * Redistribution and use in source and binary forms, with or without
   6:  * modification, are permitted provided that the following conditions
   7:  * are met:
   8:  * 1. Redistributions of source code must retain the above copyright
   9:  *    notice, this list of conditions and the following disclaimer.
  10:  * 2. Redistributions in binary form must reproduce the above copyright
  11:  *    notice, this list of conditions and the following disclaimer in the
  12:  *    documentation and/or other materials provided with the distribution.
  13:  * 3. All advertising materials mentioning features or use of this software
  14:  *    must display the following acknowledgement:
  15:  *	This product includes software developed by the University of
  16:  *	California, Berkeley and its contributors.
  17:  * 4. Neither the name of the University nor the names of its contributors
  18:  *    may be used to endorse or promote products derived from this software
  19:  *    without specific prior written permission.
  20:  *
  21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31:  * SUCH DAMAGE.
  32:  *
  33:  *	@(#)select.h	8.2.1 (2.11BSD) 2000/2/28
  34:  */
  35: 
  36: #ifndef _SYS_SELECT_H_
  37: #define _SYS_SELECT_H_
  38: 
  39: #include <sys/types.h>
  40: 
  41: /*
  42:  * Select uses bit masks of file descriptors in longs.
  43:  * These macros manipulate such bit fields (the filesystem macros use chars).
  44:  * FD_SETSIZE may be defined by the user, but the default here
  45:  * should be >= NOFILE (param.h).
  46:  */
  47: #ifndef FD_SETSIZE
  48: #define FD_SETSIZE  32
  49: #endif
  50: 
  51: typedef long    fd_mask;
  52: #define NFDBITS (sizeof(fd_mask) * NBBY)    /* bits per mask */
  53: 
  54: typedef struct fd_set {
  55:     fd_mask fds_bits[1];
  56: } fd_set;
  57: 
  58: #define FD_SET(n, p)    ((p)->fds_bits[(n)/NFDBITS] |= (1L << ((n) % NFDBITS)))
  59: #define FD_CLR(n, p)    ((p)->fds_bits[(n)/NFDBITS] &= ~(1L << ((n) % NFDBITS)))
  60: #define FD_ISSET(n, p)  ((p)->fds_bits[(n)/NFDBITS] & (1L << ((n) % NFDBITS)))
  61: #define FD_ZERO(p)  bzero((char *)(p), sizeof(*(p)))
  62: 
  63: #ifndef KERNEL
  64: int select();
  65: int pselect();
  66: #endif /* !KERNEL */
  67: 
  68: #endif /* !_SYS_SELECT_H_ */