Subversion Repositories HelenOS-historic

Rev

Rev 1658 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub 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
 
623 jermar 44
SPINLOCK_INITIALIZE(lock);
1 jermar 45
 
46
static waitq_t can_start;
47
 
1780 jermar 48
uint32_t seed = 0xdeadbeef;
1 jermar 49
 
1780 jermar 50
static uint32_t random(uint32_t max);
1 jermar 51
 
52
static void consumer(void *arg);
53
static void failed(void);
54
 
1780 jermar 55
uint32_t random(uint32_t max)
1 jermar 56
{
1780 jermar 57
    uint32_t rc;
1 jermar 58
 
59
    spinlock_lock(&lock);  
60
    rc = seed % max;
61
    seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
62
    spinlock_unlock(&lock);
63
    return rc;
64
}
65
 
66
 
67
void consumer(void *arg)
68
{
69
    int rc, to;
1658 vana 70
 
71
    thread_detach(THREAD);
72
 
1 jermar 73
    waitq_sleep(&can_start);
74
 
75
    to = random(20000);
15 jermar 76
    printf("cpu%d, tid %d down+ (%d)\n", CPU->id, THREAD->tid, to);
1 jermar 77
    rc = semaphore_down_timeout(&sem, to);
78
    if (SYNCH_FAILED(rc)) {
15 jermar 79
        printf("cpu%d, tid %d down!\n", CPU->id, THREAD->tid);
1 jermar 80
        return;
81
    }
82
 
15 jermar 83
    printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid); 
1 jermar 84
    thread_usleep(random(30000));
85
 
86
    semaphore_up(&sem);
15 jermar 87
    printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid);
1 jermar 88
}
89
 
90
void failed(void)
91
{
92
    printf("Test failed prematurely.\n");
93
    thread_exit();
94
}
95
 
96
void test(void)
97
{
1780 jermar 98
    uint32_t i, k;
1 jermar 99
 
100
    printf("Semaphore test #2\n");
101
 
102
    waitq_initialize(&can_start);
103
    semaphore_initialize(&sem, 5);
104
 
105
 
106
 
107
    for (; ;) {
108
        thread_t *thrd;
109
 
110
        k = random(7) + 1;
111
        printf("Creating %d consumers\n", k);
112
        for (i=0; i<k; i++) {
1062 jermar 113
            thrd = thread_create(consumer, NULL, TASK, 0, "consumer");
1 jermar 114
            if (thrd)
115
                thread_ready(thrd);
116
            else
117
                failed();
118
        }
119
 
120
        thread_usleep(20000);
121
        waitq_wakeup(&can_start, WAKEUP_ALL);
122
    }      
123
 
124
}