1*1eaf0ac3Slogwang /*- 2*1eaf0ac3Slogwang * Copyright (c) 1992, 1993 3*1eaf0ac3Slogwang * The Regents of the University of California. All rights reserved. 4*1eaf0ac3Slogwang * 5*1eaf0ac3Slogwang * Redistribution and use in source and binary forms, with or without 6*1eaf0ac3Slogwang * modification, are permitted provided that the following conditions 7*1eaf0ac3Slogwang * are met: 8*1eaf0ac3Slogwang * 1. Redistributions of source code must retain the above copyright 9*1eaf0ac3Slogwang * notice, this list of conditions and the following disclaimer. 10*1eaf0ac3Slogwang * 2. Redistributions in binary form must reproduce the above copyright 11*1eaf0ac3Slogwang * notice, this list of conditions and the following disclaimer in the 12*1eaf0ac3Slogwang * documentation and/or other materials provided with the distribution. 13*1eaf0ac3Slogwang * 4. Neither the name of the University nor the names of its contributors 14*1eaf0ac3Slogwang * may be used to endorse or promote products derived from this software 15*1eaf0ac3Slogwang * without specific prior written permission. 16*1eaf0ac3Slogwang * 17*1eaf0ac3Slogwang * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18*1eaf0ac3Slogwang * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*1eaf0ac3Slogwang * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*1eaf0ac3Slogwang * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21*1eaf0ac3Slogwang * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*1eaf0ac3Slogwang * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*1eaf0ac3Slogwang * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*1eaf0ac3Slogwang * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*1eaf0ac3Slogwang * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*1eaf0ac3Slogwang * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*1eaf0ac3Slogwang * SUCH DAMAGE. 28*1eaf0ac3Slogwang * 29*1eaf0ac3Slogwang * @(#)select.h 8.2 (Berkeley) 1/4/94 30*1eaf0ac3Slogwang * $FreeBSD$ 31*1eaf0ac3Slogwang */ 32*1eaf0ac3Slogwang 33*1eaf0ac3Slogwang #ifndef _SYS_SELINFO_H_ 34*1eaf0ac3Slogwang #define _SYS_SELINFO_H_ 35*1eaf0ac3Slogwang 36*1eaf0ac3Slogwang #include <sys/event.h> /* for struct klist */ 37*1eaf0ac3Slogwang 38*1eaf0ac3Slogwang struct selfd; 39*1eaf0ac3Slogwang TAILQ_HEAD(selfdlist, selfd); 40*1eaf0ac3Slogwang 41*1eaf0ac3Slogwang /* 42*1eaf0ac3Slogwang * Used to maintain information about processes that wish to be 43*1eaf0ac3Slogwang * notified when I/O becomes possible. 44*1eaf0ac3Slogwang */ 45*1eaf0ac3Slogwang struct selinfo { 46*1eaf0ac3Slogwang struct selfdlist si_tdlist; /* List of sleeping threads. */ 47*1eaf0ac3Slogwang struct knlist si_note; /* kernel note list */ 48*1eaf0ac3Slogwang struct mtx *si_mtx; /* Lock for tdlist. */ 49*1eaf0ac3Slogwang }; 50*1eaf0ac3Slogwang 51*1eaf0ac3Slogwang #define SEL_WAITING(si) (!TAILQ_EMPTY(&(si)->si_tdlist)) 52*1eaf0ac3Slogwang 53*1eaf0ac3Slogwang #ifdef _KERNEL 54*1eaf0ac3Slogwang void seldrain(struct selinfo *sip); 55*1eaf0ac3Slogwang void selrecord(struct thread *selector, struct selinfo *sip); 56*1eaf0ac3Slogwang void selwakeup(struct selinfo *sip); 57*1eaf0ac3Slogwang void selwakeuppri(struct selinfo *sip, int pri); 58*1eaf0ac3Slogwang void seltdfini(struct thread *td); 59*1eaf0ac3Slogwang #endif 60*1eaf0ac3Slogwang 61*1eaf0ac3Slogwang #endif /* !_SYS_SELINFO_H_ */ 62