1 | /*- |
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2 | * Copyright (c) 1999,2000 Jonathan Lemon <jlemon@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 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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24 | * SUCH DAMAGE. |
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25 | * |
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26 | * $FreeBSD$ |
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27 | */ |
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28 | |
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29 | #ifndef _SYS_EVENTVAR_H_ |
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30 | #define _SYS_EVENTVAR_H_ |
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31 | |
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32 | #ifndef _KERNEL |
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33 | #error "no user-servicable parts inside" |
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34 | #endif |
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35 | |
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36 | #include <sys/_task.h> |
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37 | |
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38 | #define KQ_NEVENTS 8 /* minimize copy{in,out} calls */ |
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39 | #define KQEXTENT 256 /* linear growth by this amount */ |
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40 | |
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41 | struct kqueue { |
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42 | struct mtx kq_lock; |
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43 | int kq_refcnt; |
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44 | SLIST_ENTRY(kqueue) kq_list; |
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45 | TAILQ_HEAD(, knote) kq_head; /* list of pending event */ |
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46 | int kq_count; /* number of pending events */ |
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47 | struct selinfo kq_sel; |
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48 | struct sigio *kq_sigio; |
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49 | #ifndef __rtems__ |
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50 | struct filedesc *kq_fdp; |
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51 | #endif /* __rtems__ */ |
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52 | int kq_state; |
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53 | #define KQ_SEL 0x01 |
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54 | #define KQ_SLEEP 0x02 |
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55 | #define KQ_FLUXWAIT 0x04 /* waiting for a in flux kn */ |
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56 | #define KQ_ASYNC 0x08 |
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57 | #define KQ_CLOSING 0x10 |
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58 | #define KQ_TASKSCHED 0x20 /* task scheduled */ |
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59 | #define KQ_TASKDRAIN 0x40 /* waiting for task to drain */ |
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60 | int kq_knlistsize; /* size of knlist */ |
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61 | struct klist *kq_knlist; /* list of knotes */ |
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62 | u_long kq_knhashmask; /* size of knhash */ |
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63 | struct klist *kq_knhash; /* hash table for knotes */ |
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64 | struct task kq_task; |
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65 | }; |
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66 | |
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67 | #endif /* !_SYS_EVENTVAR_H_ */ |
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