1 | /*- |
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2 | * Copyright (c) 1992, 1993 |
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3 | * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | * |
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33 | * @(#)select.h 8.2 (Berkeley) 1/4/94 |
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34 | */ |
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35 | |
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36 | #ifndef _SYS_SELECT_H_ |
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37 | #define _SYS_SELECT_H_ |
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38 | |
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39 | #include <sys/time.h> /* struct timeval */ |
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40 | |
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41 | #ifdef __cplusplus |
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42 | extern "C" { |
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43 | #endif |
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44 | |
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45 | /* |
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46 | * Used to maintain information about processes that wish to be |
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47 | * notified when I/O becomes possible. |
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48 | */ |
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49 | struct selinfo { |
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50 | pid_t si_pid; /* process to be notified */ |
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51 | short si_flags; /* see below */ |
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52 | }; |
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53 | #define SI_COLL 0x0001 /* collision occurred */ |
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54 | |
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55 | /* Check the first NFDS descriptors each in READFDS (if not NULL) for read |
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56 | readiness, in WRITEFDS (if not NULL) for write readiness, and in EXCEPTFDS |
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57 | (if not NULL) for exceptional conditions. If TIMEOUT is not NULL, time out |
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58 | after waiting the interval specified therein. Returns the number of ready |
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59 | descriptors, or -1 for errors. */ |
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60 | extern int select (int __nfds, fd_set *__restrict __readfds, |
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61 | fd_set *__restrict __writefds, |
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62 | fd_set *__restrict __exceptfds, |
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63 | struct timeval *__restrict __timeout); |
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64 | |
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65 | #ifdef __cplusplus |
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66 | } |
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67 | #endif |
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68 | |
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69 | #endif /* !_SYS_SELECT_H_ */ |
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