Subversion Repositories HelenOS

Rev

Rev 3149 | 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/waitq.h>
36
#include <synch/rwlock.h>
37
 
4348 svoboda 38
#define READERS  50
39
#define WRITERS  50
1 jermar 40
 
41
static rwlock_t rwlock;
42
 
43
static waitq_t can_start;
475 jermar 44
static atomic_t items_read;
45
static atomic_t items_written;
1 jermar 46
 
2028 decky 47
static void writer(void *arg)
1 jermar 48
{
1658 vana 49
    thread_detach(THREAD);
4348 svoboda 50
 
1 jermar 51
    waitq_sleep(&can_start);
4348 svoboda 52
 
1 jermar 53
    rwlock_write_lock(&rwlock);
54
    atomic_inc(&items_written);
55
    rwlock_write_unlock(&rwlock);
56
}
57
 
2028 decky 58
static void reader(void *arg)
1 jermar 59
{
1658 vana 60
    thread_detach(THREAD);
4348 svoboda 61
 
1 jermar 62
    waitq_sleep(&can_start);
63
 
64
    rwlock_read_lock(&rwlock);
65
    atomic_inc(&items_read);
66
    rwlock_read_unlock(&rwlock);
67
}
68
 
4348 svoboda 69
char *test_rwlock5(void)
1 jermar 70
{
71
    int i, j, k;
2745 decky 72
    long readers, writers;
1 jermar 73
 
74
    waitq_initialize(&can_start);
75
    rwlock_initialize(&rwlock);
76
 
2028 decky 77
    for (i = 1; i <= 3; i++) {
1 jermar 78
        thread_t *thrd;
4348 svoboda 79
 
627 jermar 80
        atomic_set(&items_read, 0);
81
        atomic_set(&items_written, 0);
4348 svoboda 82
 
2028 decky 83
        readers = i * READERS;
84
        writers = (4 - i) * WRITERS;
1 jermar 85
 
4348 svoboda 86
        TPRINTF("Creating %ld readers and %ld writers...", readers, writers);
87
 
2028 decky 88
        for (j = 0; j < (READERS + WRITERS) / 2; j++) {
89
            for (k = 0; k < i; k++) {
2042 decky 90
                thrd = thread_create(reader, NULL, TASK, 0, "reader", false);
1 jermar 91
                if (thrd)
92
                    thread_ready(thrd);
93
                else
4348 svoboda 94
                    TPRINTF("Could not create reader %d\n", k);
1 jermar 95
            }
2028 decky 96
            for (k = 0; k < (4 - i); k++) {
2042 decky 97
                thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
1 jermar 98
                if (thrd)
99
                    thread_ready(thrd);
100
                else
4348 svoboda 101
                    TPRINTF("Could not create writer %d\n", k);
1 jermar 102
            }
103
        }
4348 svoboda 104
 
105
        TPRINTF("ok\n");
106
 
1 jermar 107
        thread_sleep(1);
108
        waitq_wakeup(&can_start, WAKEUP_ALL);
4348 svoboda 109
 
2028 decky 110
        while ((items_read.count != readers) || (items_written.count != writers)) {
4348 svoboda 111
            TPRINTF("%d readers remaining, %d writers remaining, readers_in=%d\n", readers - items_read.count, writers - items_written.count, rwlock.readers_in);
1 jermar 112
            thread_usleep(100000);
113
        }
114
    }
2028 decky 115
 
116
    return NULL;
1 jermar 117
}