1 /** $MirOS: src/sys/sys/select.h,v 1.2 2005/03/06 21:28:34 tg Exp $ */
2 /* $NetBSD: select.h,v 1.14 2002/11/26 19:08:06 christos Exp $ */
3 /* $OpenBSD: select.h,v 1.6 2003/06/02 23:28:21 millert Exp $ */
4 /* $NetBSD: select.h,v 1.10 1995/03/26 20:24:38 jtc Exp $ */
5
6 /*-
7 * Copyright (c) 1992, 1993
8 * The Regents of the University of California. All rights reserved.
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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)select.h 8.2 (Berkeley) 1/4/94
35 */
36
37 #ifndef _SYS_SELECT_H_
38 #define _SYS_SELECT_H_
39
40 #include <sys/types.h>
41 #include <sys/event.h> /* for struct klist */
42
43 /*
44 * Used to maintain information about processes that wish to be
45 * notified when I/O becomes possible.
46 */
47 struct selinfo {
48 pid_t si_selpid; /* process to be notified */
49 struct klist si_note; /* kernel note list */
50 short si_flags; /* see below */
51 };
52 #define SI_COLL 0x0001 /* collision occurred */
53
54 #ifdef _KERNEL
55 struct proc;
56
57 void selrecord(struct proc *selector, struct selinfo *);
58 void selwakeup(struct selinfo *);
59
60 static __inline void
selnotify(struct selinfo * sip,long knhint)61 selnotify(struct selinfo *sip, long knhint)
62 {
63
64 if (sip->si_selpid != 0)
65 selwakeup(sip);
66 KNOTE(&sip->si_note, knhint);
67 }
68 #endif
69
70 #endif /* !_SYS_SELECT_H_ */
71