Subversion Repositories HelenOS

Rev

Rev 2071 | 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
#include <arch/types.h>
35
#include <arch/context.h>
36
 
37
#include <synch/waitq.h>
38
#include <synch/semaphore.h>
39
#include <synch/synch.h>
623 jermar 40
#include <synch/spinlock.h>
1 jermar 41
 
42
static semaphore_t sem;
43
 
2024 decky 44
SPINLOCK_INITIALIZE(sem_lock);
1 jermar 45
 
46
static waitq_t can_start;
47
 
2022 decky 48
static uint32_t seed = 0xdeadbeef;
1 jermar 49
 
2022 decky 50
static uint32_t random(uint32_t max)
1 jermar 51
{
1780 jermar 52
    uint32_t rc;
1 jermar 53
 
2024 decky 54
    spinlock_lock(&sem_lock);  
1 jermar 55
    rc = seed % max;
56
    seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
2024 decky 57
    spinlock_unlock(&sem_lock);
1 jermar 58
    return rc;
59
}
60
 
2022 decky 61
static void consumer(void *arg)
1 jermar 62
{
63
    int rc, to;
1658 vana 64
 
65
    thread_detach(THREAD);
66
 
1 jermar 67
    waitq_sleep(&can_start);
68
 
69
    to = random(20000);
15 jermar 70
    printf("cpu%d, tid %d down+ (%d)\n", CPU->id, THREAD->tid, to);
1 jermar 71
    rc = semaphore_down_timeout(&sem, to);
72
    if (SYNCH_FAILED(rc)) {
15 jermar 73
        printf("cpu%d, tid %d down!\n", CPU->id, THREAD->tid);
1 jermar 74
        return;
75
    }
76
 
15 jermar 77
    printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid); 
1 jermar 78
    thread_usleep(random(30000));
79
 
80
    semaphore_up(&sem);
15 jermar 81
    printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid);
1 jermar 82
}
83
 
2050 decky 84
char * test_semaphore2(bool quiet)
1 jermar 85
{
1780 jermar 86
    uint32_t i, k;
1 jermar 87
 
88
    waitq_initialize(&can_start);
89
    semaphore_initialize(&sem, 5);
90
 
2028 decky 91
    thread_t *thrd;
1 jermar 92
 
2028 decky 93
    k = random(7) + 1;
94
    printf("Creating %d consumers\n", k);
95
    for (i = 0; i < k; i++) {
2042 decky 96
        thrd = thread_create(consumer, NULL, TASK, 0, "consumer", false);
2028 decky 97
        if (thrd)
98
            thread_ready(thrd);
99
        else
100
            printf("Error creating thread\n");
101
    }
102
 
103
    thread_usleep(20000);
104
    waitq_wakeup(&can_start, WAKEUP_ALL);
105
 
106
    return NULL;
1 jermar 107
}