1 /* $NetBSD: tsleep.c,v 1.3 2012/01/28 12:23:56 rmind Exp $ */ 2 3 /*- 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND 17 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 23 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN 27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 #if !defined(lint) 32 __RCSID("$NetBSD: tsleep.c,v 1.3 2012/01/28 12:23:56 rmind Exp $"); 33 #endif /* !lint */ 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/kthread.h> 38 #include <sys/proc.h> 39 #include <sys/simplelock.h> 40 41 #include "kernspace.h" 42 43 #define NTHREADS 10 44 45 /* 46 * mpsafe thread. need dedicated interlock 47 */ 48 static kmutex_t mymtx; 49 50 static void 51 tinythread(void *arg) 52 { 53 static int wakeups; 54 int i, rv; 55 bool relock = ((uintptr_t)arg % 2) == 0; 56 57 for (i = 0; i < 1000; i++) { 58 mutex_enter(&mymtx); 59 wakeup(tinythread); 60 if (wakeups >= NTHREADS-1) { 61 mutex_exit(&mymtx); 62 break; 63 } 64 rv = mtsleep(tinythread, relock ? 0 : PNORELOCK, 65 "haa", 0, &mymtx); 66 if (relock) 67 mutex_exit(&mymtx); 68 if (rv != 0) 69 panic("mtsleep failed"); 70 } 71 72 mutex_enter(&mymtx); 73 wakeups++; 74 wakeup(tinythread); 75 76 rv = mtsleep(rumptest_tsleep, PNORELOCK, "kepuli", 1, &mymtx); 77 if (rv != EWOULDBLOCK) 78 panic("mtsleep unexpected return value %d", rv); 79 80 kthread_exit(0); 81 } 82 83 void 84 rumptest_tsleep() 85 { 86 struct lwp *notbigl[NTHREADS]; 87 int rv, i; 88 89 mutex_init(&mymtx, MUTEX_DEFAULT, IPL_NONE); 90 91 for (i = 0; i < NTHREADS; i++) { 92 rv = kthread_create(PRI_NONE, KTHREAD_MUSTJOIN| KTHREAD_MPSAFE, 93 NULL, tinythread, (void *)(uintptr_t)i, ¬bigl[i], "nb"); 94 if (rv) 95 panic("thread create failed: %d", rv); 96 } 97 98 for (i = 0; i < NTHREADS; i++) { 99 kthread_join(notbigl[i]); 100 } 101 } 102