WebSVN – HelenOS – Diff – /trunk/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 bool sh_quiet;
 
static void writer(void *arg)
{
    if (!sh_quiet)
        printf("Trying to lock rwlock for writing....\n");
   
    rwlock_write_lock(&rwlock);
    rwlock_write_unlock(&rwlock);
   
    if (!sh_quiet)
        printf("Trying to lock rwlock for reading....\n");
   
    rwlock_read_lock(&rwlock);
    rwlock_read_unlock(&rwlock);   
}
 
char * test_rwlock2(bool quiet)
{
    thread_t *thrd;
    sh_quiet = quiet;
   
    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 2053	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		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	static bool sh_quiet;	41	static bool sh_quiet;
42		42
43	static void writer(void *arg)	43	static void writer(void *arg)
44	{	44	{
45	if (!sh_quiet)	45	if (!sh_quiet)
46	printf("Trying to lock rwlock for writing....\n");	46	printf("Trying to lock rwlock for writing....\n");
47		47
48	rwlock_write_lock(&rwlock);	48	rwlock_write_lock(&rwlock);
49	rwlock_write_unlock(&rwlock);	49	rwlock_write_unlock(&rwlock);
50		50
51	if (!sh_quiet)	51	if (!sh_quiet)
52	printf("Trying to lock rwlock for reading....\n");	52	printf("Trying to lock rwlock for reading....\n");
53		53
54	rwlock_read_lock(&rwlock);	54	rwlock_read_lock(&rwlock);
55	rwlock_read_unlock(&rwlock);	55	rwlock_read_unlock(&rwlock);
56	}	56	}
57		57
58	char * test_rwlock2(bool quiet)	58	char * test_rwlock2(bool quiet)
59	{	59	{
60	thread_t *thrd;	60	thread_t *thrd;
61	sh_quiet = quiet;	61	sh_quiet = quiet;
62		62
63	rwlock_initialize(&rwlock);	63	rwlock_initialize(&rwlock);
64		64
65	rwlock_read_lock(&rwlock);	65	rwlock_read_lock(&rwlock);
66	rwlock_read_lock(&rwlock);	66	rwlock_read_lock(&rwlock);
67	rwlock_read_lock(&rwlock);	67	rwlock_read_lock(&rwlock);
68	rwlock_read_lock(&rwlock);	68	rwlock_read_lock(&rwlock);
69		69
70	thrd = thread_create(writer, NULL, TASK, 0, "writer", false);	70	thrd = thread_create(writer, NULL, TASK, 0, "writer", false);
71	if (thrd)	71	if (thrd)
72	thread_ready(thrd);	72	thread_ready(thrd);
73	else	73	else
74	return "Could not create thread";	74	return "Could not create thread";
75		75
76	thread_sleep(1);	76	thread_sleep(1);
77		77
78	rwlock_read_unlock(&rwlock);	78	rwlock_read_unlock(&rwlock);
79	rwlock_read_unlock(&rwlock);	79	rwlock_read_unlock(&rwlock);
80	rwlock_read_unlock(&rwlock);	80	rwlock_read_unlock(&rwlock);
81	rwlock_read_unlock(&rwlock);	81	rwlock_read_unlock(&rwlock);
82		82
83	thread_join(thrd);	83	thread_join(thrd);
84	thread_detach(thrd);	84	thread_detach(thrd);
85		85
86	return NULL;	86	return NULL;
87	}	87	}
88		88

Subversion Repositories HelenOS

(root)/trunk/kernel/test/synch/rwlock2.c – Rev 2053 → 2071