Subversion Repositories HelenOS

Rev

Rev 2927 | 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
 
4348 svoboda 37
#define READERS  50
38
#define WRITERS  50
1 jermar 39
 
40
static rwlock_t rwlock;
41
 
2022 decky 42
static void writer(void *arg)
1 jermar 43
{
4348 svoboda 44
    TPRINTF("Trying to lock rwlock for writing....\n");
2053 decky 45
 
1 jermar 46
    rwlock_write_lock(&rwlock);
47
    rwlock_write_unlock(&rwlock);
48
 
4348 svoboda 49
    TPRINTF("Trying to lock rwlock for reading....\n");
2053 decky 50
 
1 jermar 51
    rwlock_read_lock(&rwlock);
4348 svoboda 52
    rwlock_read_unlock(&rwlock);
1 jermar 53
}
54
 
4348 svoboda 55
char *test_rwlock2(void)
1 jermar 56
{
57
    thread_t *thrd;
58
 
59
    rwlock_initialize(&rwlock);
4348 svoboda 60
 
1 jermar 61
    rwlock_read_lock(&rwlock);
62
    rwlock_read_lock(&rwlock);
63
    rwlock_read_lock(&rwlock);
4348 svoboda 64
    rwlock_read_lock(&rwlock);
1 jermar 65
 
2042 decky 66
    thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
1 jermar 67
    if (thrd)
68
        thread_ready(thrd);
69
    else
2028 decky 70
        return "Could not create thread";
4348 svoboda 71
 
1 jermar 72
    thread_sleep(1);
73
 
74
    rwlock_read_unlock(&rwlock);
75
    rwlock_read_unlock(&rwlock);
76
    rwlock_read_unlock(&rwlock);
2028 decky 77
    rwlock_read_unlock(&rwlock);
78
 
2053 decky 79
    thread_join(thrd);
80
    thread_detach(thrd);
81
 
2028 decky 82
    return NULL;
1 jermar 83
}