Subversion Repositories HelenOS

Rev

Rev 2071 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <test.h>
30
#include <arch.h>
1104 jermar 31
#include <atomic.h>
1 jermar 32
#include <print.h>
33
#include <proc/thread.h>
34
 
35
#include <synch/rwlock.h>
36
 
37
#define READERS     50
38
#define WRITERS     50
39
 
40
static rwlock_t rwlock;
2053 decky 41
static bool sh_quiet;
1 jermar 42
 
2022 decky 43
static void writer(void *arg)
1 jermar 44
{
2053 decky 45
    if (!sh_quiet)
46
        printf("Trying to lock rwlock for writing....\n");
47
 
1 jermar 48
    rwlock_write_lock(&rwlock);
49
    rwlock_write_unlock(&rwlock);
50
 
2053 decky 51
    if (!sh_quiet)
52
        printf("Trying to lock rwlock for reading....\n");
53
 
1 jermar 54
    rwlock_read_lock(&rwlock);
55
    rwlock_read_unlock(&rwlock);   
56
}
57
 
2050 decky 58
char * test_rwlock2(bool quiet)
1 jermar 59
{
60
    thread_t *thrd;
2053 decky 61
    sh_quiet = quiet;
1 jermar 62
 
63
    rwlock_initialize(&rwlock);
64
 
65
    rwlock_read_lock(&rwlock);
66
    rwlock_read_lock(&rwlock);
67
    rwlock_read_lock(&rwlock);
68
    rwlock_read_lock(&rwlock); 
69
 
2042 decky 70
    thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
1 jermar 71
    if (thrd)
72
        thread_ready(thrd);
73
    else
2028 decky 74
        return "Could not create thread";
1 jermar 75
 
76
    thread_sleep(1);
77
 
78
    rwlock_read_unlock(&rwlock);
79
    rwlock_read_unlock(&rwlock);
80
    rwlock_read_unlock(&rwlock);
2028 decky 81
    rwlock_read_unlock(&rwlock);
82
 
2053 decky 83
    thread_join(thrd);
84
    thread_detach(thrd);
85
 
2028 decky 86
    return NULL;
1 jermar 87
}