1 /* $NetBSD: lockme.c,v 1.1 2011/01/06 13:12:52 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 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: lockme.c,v 1.1 2011/01/06 13:12:52 pooka Exp $"); 33 #endif /* !lint */ 34 35 #include <sys/param.h> 36 #include <sys/kmem.h> 37 #include <sys/mutex.h> 38 #include <sys/rwlock.h> 39 40 #include "kernspace.h" 41 42 struct somemem { 43 char foo; 44 kmutex_t mutexetum; 45 char oof; 46 }; 47 48 void 49 rumptest_lockme(enum locktest what) 50 { 51 struct somemem *some; 52 kmutex_t mtx; 53 krwlock_t rw; 54 55 rw_init(&rw); 56 mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE); 57 58 switch (what) { 59 case LOCKME_MTX: 60 mutex_enter(&mtx); 61 mutex_enter(&mtx); 62 break; 63 case LOCKME_RWDOUBLEX: 64 rw_enter(&rw, RW_WRITER); 65 rw_enter(&rw, RW_WRITER); 66 break; 67 case LOCKME_RWRX: 68 rw_enter(&rw, RW_READER); 69 rw_enter(&rw, RW_WRITER); 70 break; 71 case LOCKME_RWXR: 72 rw_enter(&rw, RW_WRITER); 73 rw_enter(&rw, RW_READER); 74 break; 75 case LOCKME_DOUBLEINIT: 76 mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE); 77 break; 78 case LOCKME_DOUBLEFREE: 79 mutex_destroy(&mtx); 80 mutex_destroy(&mtx); 81 break; 82 case LOCKME_DESTROYHELD: 83 mutex_enter(&mtx); 84 mutex_destroy(&mtx); 85 break; 86 case LOCKME_MEMFREE: 87 some = kmem_alloc(sizeof(*some), KM_SLEEP); 88 mutex_init(&some->mutexetum, MUTEX_DEFAULT, IPL_NONE); 89 kmem_free(some, sizeof(*some)); 90 break; 91 } 92 } 93