1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 1998-2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: rwlock_test.c,v 1.26 2007/06/19 23:46:59 tbox Exp $ */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <isc/print.h>
#include <isc/thread.h>
#include <isc/rwlock.h>
#include <isc/string.h>
#include <isc/util.h>
#ifdef ISC_PLATFORM_USETHREADS
isc_rwlock_t lock;
static void *
run1(void *arg) {
char *message = arg;
RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_read) ==
ISC_R_SUCCESS);
printf("%s got READ lock\n", message);
sleep(1);
printf("%s giving up READ lock\n", message);
RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_read) ==
ISC_R_SUCCESS);
RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_read) ==
ISC_R_SUCCESS);
printf("%s got READ lock\n", message);
sleep(1);
printf("%s giving up READ lock\n", message);
RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_read) ==
ISC_R_SUCCESS);
RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_write) ==
ISC_R_SUCCESS);
printf("%s got WRITE lock\n", message);
sleep(1);
printf("%s giving up WRITE lock\n", message);
RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_write) ==
ISC_R_SUCCESS);
return (NULL);
}
static void *
run2(void *arg) {
char *message = arg;
RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_write) ==
ISC_R_SUCCESS);
printf("%s got WRITE lock\n", message);
sleep(1);
printf("%s giving up WRITE lock\n", message);
RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_write) ==
ISC_R_SUCCESS);
RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_write) ==
ISC_R_SUCCESS);
printf("%s got WRITE lock\n", message);
sleep(1);
printf("%s giving up WRITE lock\n", message);
RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_write) ==
ISC_R_SUCCESS);
RUNTIME_CHECK(isc_rwlock_lock(&lock, isc_rwlocktype_read) ==
ISC_R_SUCCESS);
printf("%s got READ lock\n", message);
sleep(1);
printf("%s giving up READ lock\n", message);
RUNTIME_CHECK(isc_rwlock_unlock(&lock, isc_rwlocktype_read) ==
ISC_R_SUCCESS);
return (NULL);
}
int
main(int argc, char *argv[]) {
unsigned int nworkers;
unsigned int i;
isc_thread_t workers[100];
char name[100];
void *dupname;
if (argc > 1)
nworkers = atoi(argv[1]);
else
nworkers = 2;
if (nworkers > 100)
nworkers = 100;
printf("%d workers\n", nworkers);
RUNTIME_CHECK(isc_rwlock_init(&lock, 5, 10) == ISC_R_SUCCESS);
for (i = 0; i < nworkers; i++) {
sprintf(name, "%02u", i);
dupname = strdup(name);
RUNTIME_CHECK(dupname != NULL);
if (i != 0 && i % 3 == 0)
RUNTIME_CHECK(isc_thread_create(run1, dupname,
&workers[i]) ==
ISC_R_SUCCESS);
else
RUNTIME_CHECK(isc_thread_create(run2, dupname,
&workers[i]) ==
ISC_R_SUCCESS);
}
for (i = 0; i < nworkers; i++)
(void)isc_thread_join(workers[i], NULL);
isc_rwlock_destroy(&lock);
return (0);
}
#else
int
main(int argc, char *argv[]) {
UNUSED(argc);
UNUSED(argv);
fprintf(stderr, "This test requires threads.\n");
return(1);
}
#endif
|
