source: mainline/test/synch/rwlock4/test.c@ 7dd2561

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 7dd2561 was dc747e3, checked in by Jakub Jermar <jakub@…>, 20 years ago

Add SPINLOCK_DECLARE and SPINLOCK_INITIALIZE macros.
SPINLOCK_DECLARE is to be used instead of direct spinlock_t declarations
in dynamically allocated structures on which spinlock_initialize() is called after
their creation.
SPINLOCK_INITIALIZE is to be used instead of direct spinlock_t declarations
of global spinlocks. It declares and initializes the spinlock.
Moreover, both macros are empty on UP so that -Wall warnings about unused structures
get supressed.

  • Property mode set to 100644
File size: 3.9 KB
Line 
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>
31#include <arch/atomic.h>
32#include <print.h>
33#include <proc/thread.h>
34#include <arch/types.h>
35#include <arch/context.h>
36#include <context.h>
37#include <panic.h>
38
39#include <synch/waitq.h>
40#include <synch/rwlock.h>
41#include <synch/synch.h>
42#include <synch/spinlock.h>
43
44#define READERS 50
45#define WRITERS 50
46
47static rwlock_t rwlock;
48
49SPINLOCK_INITIALIZE(lock);
50
51static waitq_t can_start;
52
53__u32 seed = 0xdeadbeef;
54
55static __u32 random(__u32 max);
56
57static void writer(void *arg);
58static void reader(void *arg);
59static void failed(void);
60
61__u32 random(__u32 max)
62{
63 __u32 rc;
64 ipl_t ipl;
65
66 spinlock_lock(&lock);
67 rc = seed % max;
68 seed = (((seed<<2) ^ (seed>>2)) * 487) + rc;
69 spinlock_unlock(&lock);
70 return rc;
71}
72
73
74void writer(void *arg)
75{
76 int rc, to;
77 waitq_sleep(&can_start);
78
79 to = random(40000);
80 printf("cpu%d, tid %d w+ (%d)\n", CPU->id, THREAD->tid, to);
81 rc = rwlock_write_lock_timeout(&rwlock, to);
82 if (SYNCH_FAILED(rc)) {
83 printf("cpu%d, tid %d w!\n", CPU->id, THREAD->tid);
84 return;
85 };
86 printf("cpu%d, tid %d w=\n", CPU->id, THREAD->tid);
87
88 if (rwlock.readers_in) panic("Oops.");
89 thread_usleep(random(1000000));
90 if (rwlock.readers_in) panic("Oops.");
91
92 rwlock_write_unlock(&rwlock);
93 printf("cpu%d, tid %d w-\n", CPU->id, THREAD->tid);
94}
95
96void reader(void *arg)
97{
98 int rc, to;
99 waitq_sleep(&can_start);
100
101 to = random(2000);
102 printf("cpu%d, tid %d r+ (%d)\n", CPU->id, THREAD->tid, to);
103 rc = rwlock_read_lock_timeout(&rwlock, to);
104 if (SYNCH_FAILED(rc)) {
105 printf("cpu%d, tid %d r!\n", CPU->id, THREAD->tid);
106 return;
107 }
108 printf("cpu%d, tid %d r=\n", CPU->id, THREAD->tid);
109 thread_usleep(30000);
110 rwlock_read_unlock(&rwlock);
111 printf("cpu%d, tid %d r-\n", CPU->id, THREAD->tid);
112}
113
114void failed(void)
115{
116 printf("Test failed prematurely.\n");
117 thread_exit();
118}
119
120void test(void)
121{
122 context_t ctx;
123 __u32 i, k;
124
125 printf("Read/write locks test #4\n");
126
127 waitq_initialize(&can_start);
128 rwlock_initialize(&rwlock);
129
130
131
132 for (; ;) {
133 thread_t *thrd;
134
135 context_save(&ctx);
136 printf("sp=%X, readers_in=%d\n", ctx.sp, rwlock.readers_in);
137
138 k = random(7) + 1;
139 printf("Creating %d readers\n", k);
140 for (i=0; i<k; i++) {
141 thrd = thread_create(reader, NULL, TASK, 0);
142 if (thrd)
143 thread_ready(thrd);
144 else
145 failed();
146 }
147
148 k = random(5) + 1;
149 printf("Creating %d writers\n", k);
150 for (i=0; i<k; i++) {
151 thrd = thread_create(writer, NULL, TASK, 0);
152 if (thrd)
153 thread_ready(thrd);
154 else
155 failed();
156 }
157
158 thread_usleep(20000);
159 waitq_wakeup(&can_start, WAKEUP_ALL);
160 }
161
162}
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