WebSVN – HelenOS – Diff – /tags/0.4.1/kernel/test/synch/rwlock2.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 <synch/rwlock.h>
 
#define READERS  50
#define WRITERS  50
 
static rwlock_t rwlock;
 
static void writer(void *arg)
{
    TPRINTF("Trying to lock rwlock for writing....\n");
   
    rwlock_write_lock(&rwlock);
    rwlock_write_unlock(&rwlock);
   
    TPRINTF("Trying to lock rwlock for reading....\n");
   
    rwlock_read_lock(&rwlock);
    rwlock_read_unlock(&rwlock);
}
 
char *test_rwlock2(void)
{
    thread_t *thrd;
   
    rwlock_initialize(&rwlock);
   
    rwlock_read_lock(&rwlock);
    rwlock_read_lock(&rwlock);
    rwlock_read_lock(&rwlock);
    rwlock_read_lock(&rwlock);
   
    thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
    if (thrd)
        thread_ready(thrd);
    else
        return "Could not create thread";
   
    thread_sleep(1);
   
    rwlock_read_unlock(&rwlock);
    rwlock_read_unlock(&rwlock);
    rwlock_read_unlock(&rwlock);
    rwlock_read_unlock(&rwlock);
   
    thread_join(thrd);
    thread_detach(thrd);
   
    return NULL;
}
 

Rev 4227	Rev 4687
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		34
35	#include <synch/rwlock.h>	35	#include <synch/rwlock.h>
36		36
37	#define READERS 50	37	#define READERS 50
38	#define WRITERS 50	38	#define WRITERS 50
39		39
40	static rwlock_t rwlock;	40	static rwlock_t rwlock;
41		41
42	static void writer(void *arg)	42	static void writer(void *arg)
43	{	43	{
44	TPRINTF("Trying to lock rwlock for writing....\n");	44	TPRINTF("Trying to lock rwlock for writing....\n");
45		45
46	rwlock_write_lock(&rwlock);	46	rwlock_write_lock(&rwlock);
47	rwlock_write_unlock(&rwlock);	47	rwlock_write_unlock(&rwlock);
48		48
49	TPRINTF("Trying to lock rwlock for reading....\n");	49	TPRINTF("Trying to lock rwlock for reading....\n");
50		50
51	rwlock_read_lock(&rwlock);	51	rwlock_read_lock(&rwlock);
52	rwlock_read_unlock(&rwlock);	52	rwlock_read_unlock(&rwlock);
53	}	53	}
54		54
55	char *test_rwlock2(void)	55	char *test_rwlock2(void)
56	{	56	{
57	thread_t *thrd;	57	thread_t *thrd;
58		58
59	rwlock_initialize(&rwlock);	59	rwlock_initialize(&rwlock);
60		60
61	rwlock_read_lock(&rwlock);	61	rwlock_read_lock(&rwlock);
62	rwlock_read_lock(&rwlock);	62	rwlock_read_lock(&rwlock);
63	rwlock_read_lock(&rwlock);	63	rwlock_read_lock(&rwlock);
64	rwlock_read_lock(&rwlock);	64	rwlock_read_lock(&rwlock);
65		65
66	thrd = thread_create(writer, NULL, TASK, 0, "writer", false);	66	thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
67	if (thrd)	67	if (thrd)
68	thread_ready(thrd);	68	thread_ready(thrd);
69	else	69	else
70	return "Could not create thread";	70	return "Could not create thread";
71		71
72	thread_sleep(1);	72	thread_sleep(1);
73		73
74	rwlock_read_unlock(&rwlock);	74	rwlock_read_unlock(&rwlock);
75	rwlock_read_unlock(&rwlock);	75	rwlock_read_unlock(&rwlock);
76	rwlock_read_unlock(&rwlock);	76	rwlock_read_unlock(&rwlock);
77	rwlock_read_unlock(&rwlock);	77	rwlock_read_unlock(&rwlock);
78		78
79	thread_join(thrd);	79	thread_join(thrd);
80	thread_detach(thrd);	80	thread_detach(thrd);
81		81
82	return NULL;	82	return NULL;
83	}	83	}
84		84

Subversion Repositories HelenOS

(root)/tags/0.4.1/kernel/test/synch/rwlock2.c – Rev 4227 → 4687