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 1.12 2008/04/28 20:24:11 martin 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  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #ifndef _SYS_POLL_H_
   33 #define _SYS_POLL_H_
   34 
   35 #include <sys/featuretest.h>
   36 
   37 typedef unsigned int    nfds_t;
   38 
   39 struct pollfd {
   40         int     fd;             /* file descriptor */
   41         short   events;         /* events to look for */
   42         short   revents;        /* events returned */
   43 };
   44 
   45 /*
   46  * Testable events (may be specified in events field).
   47  */
   48 #define POLLIN          0x0001
   49 #define POLLPRI         0x0002
   50 #define POLLOUT         0x0004
   51 #define POLLRDNORM      0x0040
   52 #define POLLWRNORM      POLLOUT
   53 #define POLLRDBAND      0x0080
   54 #define POLLWRBAND      0x0100
   55 
   56 /*
   57  * Non-testable events (may not be specified in events field).
   58  */
   59 #define POLLERR         0x0008
   60 #define POLLHUP         0x0010
   61 #define POLLNVAL        0x0020
   62 
   63 #if defined(_NETBSD_SOURCE)
   64 /*
   65  * Infinite timeout value.
   66  */
   67 #define INFTIM          -1
   68 #endif
   69 
   70 #ifdef _KERNEL
   71 #include <sys/signal.h>         /* for sigset_t */
   72 
   73 struct lwp;
   74 struct timeval;
   75 
   76 int     pollcommon(struct lwp *, register_t *, struct pollfd *, u_int,
   77             struct timeval *, sigset_t *);
   78 #else
   79 #include <sys/cdefs.h>
   80 
   81 __BEGIN_DECLS
   82 int     poll(struct pollfd *, nfds_t, int);
   83 __END_DECLS
   84 
   85 #ifdef _NETBSD_SOURCE
   86 #include <sys/sigtypes.h>       /* for sigset_t */
   87 struct timespec;
   88 
   89 __BEGIN_DECLS
   90 int     pollts(struct pollfd * __restrict, nfds_t,
   91             const struct timespec * __restrict, const sigset_t * __restrict);
   92 __END_DECLS
   93 #endif /* _NETBSD_SOURCE */
   94 
   95 #endif /* _KERNEL */
   96 
   97 #endif /* !_SYS_POLL_H_ */

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