WebSVN – HelenOS – Diff – /trunk/kernel/test/synch/semaphore2.c


/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <test.h>
#include <arch.h>
#include <atomic.h>
#include <print.h>
#include <proc/thread.h>
#include <arch/types.h>
#include <arch/context.h>
 
#include <synch/waitq.h>
#include <synch/semaphore.h>
#include <synch/synch.h>
#include <synch/spinlock.h>
 
static semaphore_t sem;
 
SPINLOCK_INITIALIZE(sem_lock);
 
static waitq_t can_start;
 
static uint32_t seed = 0xdeadbeef;
 
static uint32_t random(uint32_t max)
{
    uint32_t rc;
 
    spinlock_lock(&sem_lock);  
    rc = seed % max;
    seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
    spinlock_unlock(&sem_lock);
    return rc;
}
 
static void consumer(void *arg)
{
    int rc, to;
   
    thread_detach(THREAD);
   
    waitq_sleep(&can_start);
   
    to = random(20000);
    printf("cpu%d, tid %d down+ (%d)\n", CPU->id, THREAD->tid, to);
    rc = semaphore_down_timeout(&sem, to);
    if (SYNCH_FAILED(rc)) {
        printf("cpu%d, tid %d down!\n", CPU->id, THREAD->tid);
        return;
    }
   
    printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid); 
    thread_usleep(random(30000));
   
    semaphore_up(&sem);
    printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid);
}
 
char * test_semaphore2(bool quiet)
{
    uint32_t i, k;
   
    waitq_initialize(&can_start);
    semaphore_initialize(&sem, 5);
   
    thread_t *thrd;
   
    k = random(7) + 1;
    printf("Creating %d consumers\n", k);
    for (i = 0; i < k; i++) {
        thrd = thread_create(consumer, NULL, TASK, 0, "consumer", false);
        if (thrd)
            thread_ready(thrd);
        else
            printf("Error creating thread\n");
    }
   
    thread_usleep(20000);
    waitq_wakeup(&can_start, WAKEUP_ALL);
   
    return NULL;
}
 

Rev 2050	Rev 2071
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (c) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <test.h>	29	#include <test.h>
30	#include <arch.h>	30	#include <arch.h>
31	#include <atomic.h>	31	#include <atomic.h>
32	#include <print.h>	32	#include <print.h>
33	#include <proc/thread.h>	33	#include <proc/thread.h>
34	#include <arch/types.h>	34	#include <arch/types.h>
35	#include <arch/context.h>	35	#include <arch/context.h>
36		36
37	#include <synch/waitq.h>	37	#include <synch/waitq.h>
38	#include <synch/semaphore.h>	38	#include <synch/semaphore.h>
39	#include <synch/synch.h>	39	#include <synch/synch.h>
40	#include <synch/spinlock.h>	40	#include <synch/spinlock.h>
41		41
42	static semaphore_t sem;	42	static semaphore_t sem;
43		43
44	SPINLOCK_INITIALIZE(sem_lock);	44	SPINLOCK_INITIALIZE(sem_lock);
45		45
46	static waitq_t can_start;	46	static waitq_t can_start;
47		47
48	static uint32_t seed = 0xdeadbeef;	48	static uint32_t seed = 0xdeadbeef;
49		49
50	static uint32_t random(uint32_t max)	50	static uint32_t random(uint32_t max)
51	{	51	{
52	uint32_t rc;	52	uint32_t rc;
53		53
54	spinlock_lock(&sem_lock);	54	spinlock_lock(&sem_lock);
55	rc = seed % max;	55	rc = seed % max;
56	seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;	56	seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
57	spinlock_unlock(&sem_lock);	57	spinlock_unlock(&sem_lock);
58	return rc;	58	return rc;
59	}	59	}
60		60
61	static void consumer(void *arg)	61	static void consumer(void *arg)
62	{	62	{
63	int rc, to;	63	int rc, to;
64		64
65	thread_detach(THREAD);	65	thread_detach(THREAD);
66		66
67	waitq_sleep(&can_start);	67	waitq_sleep(&can_start);
68		68
69	to = random(20000);	69	to = random(20000);
70	printf("cpu%d, tid %d down+ (%d)\n", CPU->id, THREAD->tid, to);	70	printf("cpu%d, tid %d down+ (%d)\n", CPU->id, THREAD->tid, to);
71	rc = semaphore_down_timeout(&sem, to);	71	rc = semaphore_down_timeout(&sem, to);
72	if (SYNCH_FAILED(rc)) {	72	if (SYNCH_FAILED(rc)) {
73	printf("cpu%d, tid %d down!\n", CPU->id, THREAD->tid);	73	printf("cpu%d, tid %d down!\n", CPU->id, THREAD->tid);
74	return;	74	return;
75	}	75	}
76		76
77	printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid);	77	printf("cpu%d, tid %d down=\n", CPU->id, THREAD->tid);
78	thread_usleep(random(30000));	78	thread_usleep(random(30000));
79		79
80	semaphore_up(&sem);	80	semaphore_up(&sem);
81	printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid);	81	printf("cpu%d, tid %d up\n", CPU->id, THREAD->tid);
82	}	82	}
83		83
84	char * test_semaphore2(bool quiet)	84	char * test_semaphore2(bool quiet)
85	{	85	{
86	uint32_t i, k;	86	uint32_t i, k;
87		87
88	waitq_initialize(&can_start);	88	waitq_initialize(&can_start);
89	semaphore_initialize(&sem, 5);	89	semaphore_initialize(&sem, 5);
90		90
91	thread_t *thrd;	91	thread_t *thrd;
92		92
93	k = random(7) + 1;	93	k = random(7) + 1;
94	printf("Creating %d consumers\n", k);	94	printf("Creating %d consumers\n", k);
95	for (i = 0; i < k; i++) {	95	for (i = 0; i < k; i++) {
96	thrd = thread_create(consumer, NULL, TASK, 0, "consumer", false);	96	thrd = thread_create(consumer, NULL, TASK, 0, "consumer", false);
97	if (thrd)	97	if (thrd)
98	thread_ready(thrd);	98	thread_ready(thrd);
99	else	99	else
100	printf("Error creating thread\n");	100	printf("Error creating thread\n");
101	}	101	}
102		102
103	thread_usleep(20000);	103	thread_usleep(20000);
104	waitq_wakeup(&can_start, WAKEUP_ALL);	104	waitq_wakeup(&can_start, WAKEUP_ALL);
105		105
106	return NULL;	106	return NULL;
107	}	107	}
108		108

Subversion Repositories HelenOS

(root)/trunk/kernel/test/synch/semaphore2.c – Rev 2050 → 2071