ltsleep.c revision 1.3.4.2
1 1.3.4.2 yamt /* $NetBSD: ltsleep.c,v 1.3.4.2 2007/11/15 11:45:26 yamt Exp $ */ 2 1.3.4.2 yamt 3 1.3.4.2 yamt /* 4 1.3.4.2 yamt * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 1.3.4.2 yamt * 6 1.3.4.2 yamt * Development of this software was supported by the 7 1.3.4.2 yamt * Finnish Cultural Foundation. 8 1.3.4.2 yamt * 9 1.3.4.2 yamt * Redistribution and use in source and binary forms, with or without 10 1.3.4.2 yamt * modification, are permitted provided that the following conditions 11 1.3.4.2 yamt * are met: 12 1.3.4.2 yamt * 1. Redistributions of source code must retain the above copyright 13 1.3.4.2 yamt * notice, this list of conditions and the following disclaimer. 14 1.3.4.2 yamt * 2. Redistributions in binary form must reproduce the above copyright 15 1.3.4.2 yamt * notice, this list of conditions and the following disclaimer in the 16 1.3.4.2 yamt * documentation and/or other materials provided with the distribution. 17 1.3.4.2 yamt * 18 1.3.4.2 yamt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 1.3.4.2 yamt * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 1.3.4.2 yamt * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 1.3.4.2 yamt * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 1.3.4.2 yamt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 1.3.4.2 yamt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 1.3.4.2 yamt * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.3.4.2 yamt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 1.3.4.2 yamt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 1.3.4.2 yamt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 1.3.4.2 yamt * SUCH DAMAGE. 29 1.3.4.2 yamt */ 30 1.3.4.2 yamt 31 1.3.4.2 yamt #include <sys/param.h> 32 1.3.4.2 yamt #include <sys/proc.h> 33 1.3.4.2 yamt #include <sys/queue.h> 34 1.3.4.2 yamt 35 1.3.4.2 yamt #include "rump_private.h" 36 1.3.4.2 yamt #include "rumpuser.h" 37 1.3.4.2 yamt 38 1.3.4.2 yamt struct ltsleeper { 39 1.3.4.2 yamt wchan_t id; 40 1.3.4.2 yamt kcondvar_t cv; 41 1.3.4.2 yamt LIST_ENTRY(ltsleeper) entries; 42 1.3.4.2 yamt }; 43 1.3.4.2 yamt 44 1.3.4.2 yamt static LIST_HEAD(, ltsleeper) sleepers = LIST_HEAD_INITIALIZER(sleepers); 45 1.3.4.2 yamt static kmutex_t sleepermtx; 46 1.3.4.2 yamt 47 1.3.4.2 yamt int 48 1.3.4.2 yamt ltsleep(wchan_t ident, pri_t prio, const char *wmesg, int timo, 49 1.3.4.2 yamt volatile struct simplelock *slock) 50 1.3.4.2 yamt { 51 1.3.4.2 yamt struct ltsleeper lts; 52 1.3.4.2 yamt int iplrecurse; 53 1.3.4.2 yamt 54 1.3.4.2 yamt lts.id = ident; 55 1.3.4.2 yamt cv_init(<s.cv, NULL); 56 1.3.4.2 yamt 57 1.3.4.2 yamt mutex_enter(&sleepermtx); 58 1.3.4.2 yamt LIST_INSERT_HEAD(&sleepers, <s, entries); 59 1.3.4.2 yamt 60 1.3.4.2 yamt /* release spl */ 61 1.3.4.2 yamt iplrecurse = rumpuser_whatis_ipl(); 62 1.3.4.2 yamt while (iplrecurse--) 63 1.3.4.2 yamt rumpuser_rw_exit(&rumpspl); 64 1.3.4.2 yamt 65 1.3.4.2 yamt /* protected by sleepermtx */ 66 1.3.4.2 yamt if (slock) 67 1.3.4.2 yamt simple_unlock(slock); 68 1.3.4.2 yamt cv_wait(<s.cv, &sleepermtx); 69 1.3.4.2 yamt 70 1.3.4.2 yamt /* retake ipl */ 71 1.3.4.2 yamt iplrecurse = rumpuser_whatis_ipl(); 72 1.3.4.2 yamt while (iplrecurse--) 73 1.3.4.2 yamt rumpuser_rw_enter(&rumpspl, 0); 74 1.3.4.2 yamt 75 1.3.4.2 yamt LIST_REMOVE(<s, entries); 76 1.3.4.2 yamt mutex_exit(&sleepermtx); 77 1.3.4.2 yamt 78 1.3.4.2 yamt cv_destroy(<s.cv); 79 1.3.4.2 yamt 80 1.3.4.2 yamt if (slock && (prio & PNORELOCK) == 0) 81 1.3.4.2 yamt simple_lock(slock); 82 1.3.4.2 yamt 83 1.3.4.2 yamt return 0; 84 1.3.4.2 yamt } 85 1.3.4.2 yamt 86 1.3.4.2 yamt void 87 1.3.4.2 yamt wakeup(wchan_t ident) 88 1.3.4.2 yamt { 89 1.3.4.2 yamt struct ltsleeper *ltsp; 90 1.3.4.2 yamt 91 1.3.4.2 yamt mutex_enter(&sleepermtx); 92 1.3.4.2 yamt LIST_FOREACH(ltsp, &sleepers, entries) 93 1.3.4.2 yamt if (ltsp->id == ident) 94 1.3.4.2 yamt cv_signal(<sp->cv); 95 1.3.4.2 yamt mutex_exit(&sleepermtx); 96 1.3.4.2 yamt } 97 1.3.4.2 yamt 98 1.3.4.2 yamt void 99 1.3.4.2 yamt rump_sleepers_init() 100 1.3.4.2 yamt { 101 1.3.4.2 yamt 102 1.3.4.2 yamt mutex_init(&sleepermtx, MUTEX_DEFAULT, 0); 103 1.3.4.2 yamt } 104
Indexes created Wed Oct 01 07:09:59 GMT 2025