ltsleep.c revision 1.2.4.4
1 1.2.4.4 matt /* $NetBSD: ltsleep.c,v 1.2.4.4 2008/01/09 01:58:00 matt Exp $ */ 2 1.2.4.2 matt 3 1.2.4.2 matt /* 4 1.2.4.2 matt * Copyright (c) 2007 Antti Kantee. All Rights Reserved. 5 1.2.4.2 matt * 6 1.2.4.2 matt * Development of this software was supported by the 7 1.2.4.2 matt * Finnish Cultural Foundation. 8 1.2.4.2 matt * 9 1.2.4.2 matt * Redistribution and use in source and binary forms, with or without 10 1.2.4.2 matt * modification, are permitted provided that the following conditions 11 1.2.4.2 matt * are met: 12 1.2.4.2 matt * 1. Redistributions of source code must retain the above copyright 13 1.2.4.2 matt * notice, this list of conditions and the following disclaimer. 14 1.2.4.2 matt * 2. Redistributions in binary form must reproduce the above copyright 15 1.2.4.2 matt * notice, this list of conditions and the following disclaimer in the 16 1.2.4.2 matt * documentation and/or other materials provided with the distribution. 17 1.2.4.2 matt * 18 1.2.4.2 matt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 1.2.4.2 matt * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 1.2.4.2 matt * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 1.2.4.2 matt * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 1.2.4.2 matt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 1.2.4.2 matt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 1.2.4.2 matt * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 1.2.4.2 matt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 1.2.4.2 matt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 1.2.4.2 matt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 1.2.4.2 matt * SUCH DAMAGE. 29 1.2.4.2 matt */ 30 1.2.4.2 matt 31 1.2.4.2 matt #include <sys/param.h> 32 1.2.4.2 matt #include <sys/proc.h> 33 1.2.4.2 matt #include <sys/queue.h> 34 1.2.4.4 matt #include <sys/simplelock.h> 35 1.2.4.2 matt 36 1.2.4.2 matt #include "rump_private.h" 37 1.2.4.3 matt #include "rumpuser.h" 38 1.2.4.2 matt 39 1.2.4.2 matt struct ltsleeper { 40 1.2.4.2 matt wchan_t id; 41 1.2.4.2 matt kcondvar_t cv; 42 1.2.4.2 matt LIST_ENTRY(ltsleeper) entries; 43 1.2.4.2 matt }; 44 1.2.4.2 matt 45 1.2.4.2 matt static LIST_HEAD(, ltsleeper) sleepers = LIST_HEAD_INITIALIZER(sleepers); 46 1.2.4.2 matt static kmutex_t sleepermtx; 47 1.2.4.2 matt 48 1.2.4.2 matt int 49 1.2.4.2 matt ltsleep(wchan_t ident, pri_t prio, const char *wmesg, int timo, 50 1.2.4.2 matt volatile struct simplelock *slock) 51 1.2.4.2 matt { 52 1.2.4.2 matt struct ltsleeper lts; 53 1.2.4.3 matt int iplrecurse; 54 1.2.4.2 matt 55 1.2.4.2 matt lts.id = ident; 56 1.2.4.2 matt cv_init(<s.cv, NULL); 57 1.2.4.2 matt 58 1.2.4.2 matt mutex_enter(&sleepermtx); 59 1.2.4.2 matt LIST_INSERT_HEAD(&sleepers, <s, entries); 60 1.2.4.3 matt 61 1.2.4.3 matt /* release spl */ 62 1.2.4.3 matt iplrecurse = rumpuser_whatis_ipl(); 63 1.2.4.3 matt while (iplrecurse--) 64 1.2.4.3 matt rumpuser_rw_exit(&rumpspl); 65 1.2.4.3 matt 66 1.2.4.2 matt /* protected by sleepermtx */ 67 1.2.4.2 matt if (slock) 68 1.2.4.2 matt simple_unlock(slock); 69 1.2.4.2 matt cv_wait(<s.cv, &sleepermtx); 70 1.2.4.3 matt 71 1.2.4.3 matt /* retake ipl */ 72 1.2.4.3 matt iplrecurse = rumpuser_whatis_ipl(); 73 1.2.4.3 matt while (iplrecurse--) 74 1.2.4.3 matt rumpuser_rw_enter(&rumpspl, 0); 75 1.2.4.3 matt 76 1.2.4.2 matt LIST_REMOVE(<s, entries); 77 1.2.4.2 matt mutex_exit(&sleepermtx); 78 1.2.4.2 matt 79 1.2.4.2 matt cv_destroy(<s.cv); 80 1.2.4.2 matt 81 1.2.4.2 matt if (slock && (prio & PNORELOCK) == 0) 82 1.2.4.2 matt simple_lock(slock); 83 1.2.4.2 matt 84 1.2.4.2 matt return 0; 85 1.2.4.2 matt } 86 1.2.4.2 matt 87 1.2.4.4 matt int 88 1.2.4.4 matt mtsleep(wchan_t ident, pri_t prio, const char *wmesg, int timo, 89 1.2.4.4 matt kmutex_t *lock) 90 1.2.4.4 matt { 91 1.2.4.4 matt struct ltsleeper lts; 92 1.2.4.4 matt int iplrecurse; 93 1.2.4.4 matt 94 1.2.4.4 matt lts.id = ident; 95 1.2.4.4 matt cv_init(<s.cv, NULL); 96 1.2.4.4 matt 97 1.2.4.4 matt mutex_enter(&sleepermtx); 98 1.2.4.4 matt LIST_INSERT_HEAD(&sleepers, <s, entries); 99 1.2.4.4 matt 100 1.2.4.4 matt /* release spl */ 101 1.2.4.4 matt iplrecurse = rumpuser_whatis_ipl(); 102 1.2.4.4 matt while (iplrecurse--) 103 1.2.4.4 matt rumpuser_rw_exit(&rumpspl); 104 1.2.4.4 matt 105 1.2.4.4 matt /* protected by sleepermtx */ 106 1.2.4.4 matt mutex_exit(lock); 107 1.2.4.4 matt cv_wait(<s.cv, &sleepermtx); 108 1.2.4.4 matt 109 1.2.4.4 matt /* retake ipl */ 110 1.2.4.4 matt iplrecurse = rumpuser_whatis_ipl(); 111 1.2.4.4 matt while (iplrecurse--) 112 1.2.4.4 matt rumpuser_rw_enter(&rumpspl, 0); 113 1.2.4.4 matt 114 1.2.4.4 matt LIST_REMOVE(<s, entries); 115 1.2.4.4 matt mutex_exit(&sleepermtx); 116 1.2.4.4 matt 117 1.2.4.4 matt cv_destroy(<s.cv); 118 1.2.4.4 matt 119 1.2.4.4 matt if ((prio & PNORELOCK) == 0) 120 1.2.4.4 matt mutex_enter(lock); 121 1.2.4.4 matt 122 1.2.4.4 matt return 0; 123 1.2.4.4 matt } 124 1.2.4.4 matt 125 1.2.4.2 matt void 126 1.2.4.2 matt wakeup(wchan_t ident) 127 1.2.4.2 matt { 128 1.2.4.2 matt struct ltsleeper *ltsp; 129 1.2.4.2 matt 130 1.2.4.2 matt mutex_enter(&sleepermtx); 131 1.2.4.2 matt LIST_FOREACH(ltsp, &sleepers, entries) 132 1.2.4.2 matt if (ltsp->id == ident) 133 1.2.4.2 matt cv_signal(<sp->cv); 134 1.2.4.2 matt mutex_exit(&sleepermtx); 135 1.2.4.2 matt } 136 1.2.4.2 matt 137 1.2.4.2 matt void 138 1.2.4.2 matt rump_sleepers_init() 139 1.2.4.2 matt { 140 1.2.4.2 matt 141 1.2.4.2 matt mutex_init(&sleepermtx, MUTEX_DEFAULT, 0); 142 1.2.4.2 matt } 143
Indexes created Wed Oct 01 07:09:59 GMT 2025