1*57718be8SEnji Cooper /* $NetBSD: lockme.c,v 1.1 2011/01/06 13:12:52 pooka Exp $ */
2*57718be8SEnji Cooper
3*57718be8SEnji Cooper /*-
4*57718be8SEnji Cooper * Copyright (c) 2011 The NetBSD Foundation, Inc.
5*57718be8SEnji Cooper * All rights reserved.
6*57718be8SEnji Cooper *
7*57718be8SEnji Cooper * Redistribution and use in source and binary forms, with or without
8*57718be8SEnji Cooper * modification, are permitted provided that the following conditions
9*57718be8SEnji Cooper * are met:
10*57718be8SEnji Cooper * 1. Redistributions of source code must retain the above copyright
11*57718be8SEnji Cooper * notice, this list of conditions and the following disclaimer.
12*57718be8SEnji Cooper * 2. Redistributions in binary form must reproduce the above copyright
13*57718be8SEnji Cooper * notice, this list of conditions and the following disclaimer in the
14*57718be8SEnji Cooper * documentation and/or other materials provided with the distribution.
15*57718be8SEnji Cooper *
16*57718be8SEnji Cooper * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
17*57718be8SEnji Cooper * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
18*57718be8SEnji Cooper * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19*57718be8SEnji Cooper * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20*57718be8SEnji Cooper * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
21*57718be8SEnji Cooper * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22*57718be8SEnji Cooper * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
23*57718be8SEnji Cooper * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24*57718be8SEnji Cooper * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25*57718be8SEnji Cooper * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26*57718be8SEnji Cooper * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27*57718be8SEnji Cooper * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28*57718be8SEnji Cooper */
29*57718be8SEnji Cooper
30*57718be8SEnji Cooper #include <sys/cdefs.h>
31*57718be8SEnji Cooper #if !defined(lint)
32*57718be8SEnji Cooper __RCSID("$NetBSD: lockme.c,v 1.1 2011/01/06 13:12:52 pooka Exp $");
33*57718be8SEnji Cooper #endif /* !lint */
34*57718be8SEnji Cooper
35*57718be8SEnji Cooper #include <sys/param.h>
36*57718be8SEnji Cooper #include <sys/kmem.h>
37*57718be8SEnji Cooper #include <sys/mutex.h>
38*57718be8SEnji Cooper #include <sys/rwlock.h>
39*57718be8SEnji Cooper
40*57718be8SEnji Cooper #include "kernspace.h"
41*57718be8SEnji Cooper
42*57718be8SEnji Cooper struct somemem {
43*57718be8SEnji Cooper char foo;
44*57718be8SEnji Cooper kmutex_t mutexetum;
45*57718be8SEnji Cooper char oof;
46*57718be8SEnji Cooper };
47*57718be8SEnji Cooper
48*57718be8SEnji Cooper void
rumptest_lockme(enum locktest what)49*57718be8SEnji Cooper rumptest_lockme(enum locktest what)
50*57718be8SEnji Cooper {
51*57718be8SEnji Cooper struct somemem *some;
52*57718be8SEnji Cooper kmutex_t mtx;
53*57718be8SEnji Cooper krwlock_t rw;
54*57718be8SEnji Cooper
55*57718be8SEnji Cooper rw_init(&rw);
56*57718be8SEnji Cooper mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE);
57*57718be8SEnji Cooper
58*57718be8SEnji Cooper switch (what) {
59*57718be8SEnji Cooper case LOCKME_MTX:
60*57718be8SEnji Cooper mutex_enter(&mtx);
61*57718be8SEnji Cooper mutex_enter(&mtx);
62*57718be8SEnji Cooper break;
63*57718be8SEnji Cooper case LOCKME_RWDOUBLEX:
64*57718be8SEnji Cooper rw_enter(&rw, RW_WRITER);
65*57718be8SEnji Cooper rw_enter(&rw, RW_WRITER);
66*57718be8SEnji Cooper break;
67*57718be8SEnji Cooper case LOCKME_RWRX:
68*57718be8SEnji Cooper rw_enter(&rw, RW_READER);
69*57718be8SEnji Cooper rw_enter(&rw, RW_WRITER);
70*57718be8SEnji Cooper break;
71*57718be8SEnji Cooper case LOCKME_RWXR:
72*57718be8SEnji Cooper rw_enter(&rw, RW_WRITER);
73*57718be8SEnji Cooper rw_enter(&rw, RW_READER);
74*57718be8SEnji Cooper break;
75*57718be8SEnji Cooper case LOCKME_DOUBLEINIT:
76*57718be8SEnji Cooper mutex_init(&mtx, MUTEX_DEFAULT, IPL_NONE);
77*57718be8SEnji Cooper break;
78*57718be8SEnji Cooper case LOCKME_DOUBLEFREE:
79*57718be8SEnji Cooper mutex_destroy(&mtx);
80*57718be8SEnji Cooper mutex_destroy(&mtx);
81*57718be8SEnji Cooper break;
82*57718be8SEnji Cooper case LOCKME_DESTROYHELD:
83*57718be8SEnji Cooper mutex_enter(&mtx);
84*57718be8SEnji Cooper mutex_destroy(&mtx);
85*57718be8SEnji Cooper break;
86*57718be8SEnji Cooper case LOCKME_MEMFREE:
87*57718be8SEnji Cooper some = kmem_alloc(sizeof(*some), KM_SLEEP);
88*57718be8SEnji Cooper mutex_init(&some->mutexetum, MUTEX_DEFAULT, IPL_NONE);
89*57718be8SEnji Cooper kmem_free(some, sizeof(*some));
90*57718be8SEnji Cooper break;
91*57718be8SEnji Cooper }
92*57718be8SEnji Cooper }
93