1 /* $NetBSD: select.h,v 1.14 2002/11/26 19:08:06 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)select.h 8.2 (Berkeley) 1/4/94 36 */ 37 38 #ifndef _SYS_SELECT_H_ 39 #define _SYS_SELECT_H_ 40 41 #include <sys/types.h> 42 #include <sys/event.h> /* for struct klist */ 43 44 /* 45 * Used to maintain information about processes that wish to be 46 * notified when I/O becomes possible. 47 */ 48 struct selinfo { 49 pid_t sel_pid; /* process to be notified */ 50 struct klist sel_klist; /* knotes attached to this selinfo */ 51 short sel_flags; /* see below */ 52 }; 53 #define SI_COLL 0x0001 /* collision occurred */ 54 55 #ifdef _KERNEL 56 struct proc; 57 58 void selrecord(struct proc *selector, struct selinfo *); 59 void selwakeup(struct selinfo *); 60 61 static __inline void 62 selnotify(struct selinfo *sip, long knhint) 63 { 64 65 if (sip->sel_pid != 0) 66 selwakeup(sip); 67 KNOTE(&sip->sel_klist, knhint); 68 } 69 #endif 70 71 #endif /* !_SYS_SELECT_H_ */ 72