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1 /*- |
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2 * Copyright (c) 1997 Peter Wemm <peter@freebsd.org> |
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3 * All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms, with or without |
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6 * modification, are permitted provided that the following conditions |
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7 * are met: |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * 2. Redistributions in binary form must reproduce the above copyright |
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11 * notice, this list of conditions and the following disclaimer in the |
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12 * documentation and/or other materials provided with the distribution. |
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13 * 3. The name of the author may not be used to endorse or promote products |
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14 * derived from this software without specific prior written permission. |
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15 * |
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16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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26 * SUCH DAMAGE. |
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27 * © Portions copyright (c) 2007 Symbian Software Ltd. All rights reserved. |
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28 * $FreeBSD: src/sys/sys/poll.h,v 1.13 2002/07/10 04:47:25 mike Exp $ |
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29 */ |
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30 |
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31 #ifndef _SYS_POLL_H_ |
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32 #define _SYS_POLL_H_ |
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33 |
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34 #include <sys/cdefs.h> |
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35 |
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36 /* |
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37 * This file is intended to be compatible with the traditional poll.h. |
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38 */ |
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39 |
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40 typedef unsigned int nfds_t; |
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41 |
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42 /* |
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43 * This structure is passed as an array to poll(2). |
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44 */ |
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45 struct pollfd { |
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46 int fd; /* which file descriptor to poll */ |
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47 short events; /* events we are interested in */ |
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48 short revents; /* events found on return */ |
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49 }; |
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50 |
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51 /* |
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52 * Requestable events. If poll(2) finds any of these set, they are |
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53 * copied to revents on return. |
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54 * XXX Note that FreeBSD doesn't make much distinction between POLLPRI |
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55 * and POLLRDBAND since none of the file types have distinct priority |
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56 * bands - and only some have an urgent "mode". |
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57 * XXX Note POLLIN isn't really supported in true SVSV terms. Under SYSV |
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58 * POLLIN includes all of normal, band and urgent data. Most poll handlers |
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59 * on FreeBSD only treat it as "normal" data. |
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60 */ |
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61 #define POLLIN 0x0001 /* any readable data available */ |
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62 #define POLLPRI 0x0002 /* OOB/Urgent readable data */ |
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63 #define POLLOUT 0x0004 /* file descriptor is writeable */ |
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64 #define POLLRDNORM 0x0040 /* non-OOB/URG data available */ |
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65 #define POLLWRNORM POLLOUT /* no write type differentiation */ |
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66 #define POLLRDBAND 0x0080 /* OOB/Urgent readable data */ |
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67 #define POLLWRBAND 0x0100 /* OOB/Urgent data can be written */ |
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68 |
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69 #if __BSD_VISIBLE |
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70 /* General FreeBSD extension (currently only supported for sockets): */ |
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71 #define POLLINIGNEOF 0x2000 /* like POLLIN, except ignore EOF */ |
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72 #endif |
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73 |
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74 /* |
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75 * These events are set if they occur regardless of whether they were |
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76 * requested. |
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77 */ |
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78 #define POLLERR 0x0008 /* some poll error occurred */ |
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79 #define POLLHUP 0x0010 /* file descriptor was "hung up" */ |
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80 #define POLLNVAL 0x0020 /* requested events "invalid" */ |
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81 |
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82 #if __BSD_VISIBLE |
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83 |
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84 #define POLLSTANDARD (POLLIN|POLLPRI|POLLOUT|POLLRDNORM|POLLRDBAND|\ |
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85 POLLWRBAND|POLLERR|POLLHUP|POLLNVAL) |
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86 |
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87 /* |
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88 * Request that poll() wait forever. |
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89 * XXX in SYSV, this is defined in stropts.h, which is not included |
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90 * by poll.h. |
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91 */ |
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92 #define INFTIM (-1) |
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93 |
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94 #endif |
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95 |
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96 #endif /* !_SYS_POLL_H_ */ |