The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/poll.h

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    1 /*      $NetBSD: poll.h,v 1.7 2003/04/28 23:16:29 bjh21 Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Charles M. Hannum.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by the NetBSD
   21  *      Foundation, Inc. and its contributors.
   22  * 4. Neither the name of The NetBSD Foundation nor the names of its
   23  *    contributors may be used to endorse or promote products derived
   24  *    from this software without specific prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   36  * POSSIBILITY OF SUCH DAMAGE.
   37  */
   38 
   39 #ifndef _SYS_POLL_H_
   40 #define _SYS_POLL_H_
   41 
   42 #include <sys/featuretest.h>
   43 
   44 typedef unsigned int    nfds_t;
   45 
   46 struct pollfd {
   47         int     fd;             /* file descriptor */
   48         short   events;         /* events to look for */
   49         short   revents;        /* events returned */
   50 };
   51 
   52 /*
   53  * Testable events (may be specified in events field).
   54  */
   55 #define POLLIN          0x0001
   56 #define POLLPRI         0x0002
   57 #define POLLOUT         0x0004
   58 #define POLLRDNORM      0x0040
   59 #define POLLWRNORM      POLLOUT
   60 #define POLLRDBAND      0x0080
   61 #define POLLWRBAND      0x0100
   62 
   63 /*
   64  * Non-testable events (may not be specified in events field).
   65  */
   66 #define POLLERR         0x0008
   67 #define POLLHUP         0x0010
   68 #define POLLNVAL        0x0020
   69 
   70 #if defined(_NETBSD_SOURCE)
   71 /*
   72  * Infinite timeout value.
   73  */
   74 #define INFTIM          -1
   75 #endif
   76 
   77 #ifndef _KERNEL
   78 
   79 #include <sys/cdefs.h>
   80 
   81 __BEGIN_DECLS
   82 int     poll __P((struct pollfd *, nfds_t, int));
   83 __END_DECLS
   84 
   85 #endif /* _KERNEL */
   86 
   87 #endif /* !_SYS_POLL_H_ */

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