Subversion Repositories HelenOS

Rev

Rev 2053 | Rev 2216 | Go to most recent revision | 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 
 
2053 decky 37 
#define THREADS 4
1 jermar 38 
 
2053 decky 39 
static atomic_t thread_count;
1 jermar 40 
static rwlock_t rwlock;
2053 decky 41 
static bool sh_quiet;
1 jermar 42 
 
2022 decky 43 
static void reader(void *arg)
1 jermar 44 
{
1658 vana 45 
    thread_detach(THREAD);
2053 decky 46 
 
47 
    if (!sh_quiet)
48 
        printf("cpu%d, tid %d: trying to lock rwlock for reading....\n", CPU->id, THREAD->tid);
49 
 
1 jermar 50 
    rwlock_read_lock(&rwlock);
2053 decky 51 
    rwlock_read_unlock(&rwlock);
52 
 
53 
    if (!sh_quiet) {
54 
        printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);          
55 
        printf("cpu%d, tid %d: trying to lock rwlock for writing....\n", CPU->id, THREAD->tid);    
56 
    }
1 jermar 57 
 
58 
    rwlock_write_lock(&rwlock);
59 
    rwlock_write_unlock(&rwlock);
2053 decky 60 
 
61 
    if (!sh_quiet)
62 
        printf("cpu%d, tid %d: success\n", CPU->id, THREAD->tid);
63 
 
64 
    atomic_dec(&thread_count);
1 jermar 65 
}
66 
 
2050 decky 67 
char * test_rwlock3(bool quiet)
1 jermar 68 
{
69 
    int i;
70 
    thread_t *thrd;
2053 decky 71 
    sh_quiet = quiet;
1 jermar 72 
 
2053 decky 73 
    atomic_set(&thread_count, THREADS);
74 
 
1 jermar 75 
    rwlock_initialize(&rwlock);
76 
    rwlock_write_lock(&rwlock);
77 
 
2053 decky 78 
    for (i = 0; i < THREADS; i++) {
2042 decky 79 
        thrd = thread_create(reader, NULL, TASK, 0, "reader", false);
1 jermar 80 
        if (thrd)
81 
            thread_ready(thrd);
2053 decky 82 
        else if (!quiet)
2028 decky 83 
            printf("Could not create reader %d\n", i);
1 jermar 84 
    }
85 
 
86 
    thread_sleep(1);
87 
    rwlock_write_unlock(&rwlock);
2028 decky 88 
 
2053 decky 89 
    while (atomic_get(&thread_count) > 0) {
90 
        if (!quiet)
91 
            printf("Threads left: %d\n", atomic_get(&thread_count));
92 
        thread_sleep(1);
93 
    }
94 
 
2028 decky 95 
    return NULL;
1 jermar 96 
}