Commit | Line | Data |
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b257a10b MD |
1 | /* |
2 | * test_urcu.c | |
3 | * | |
4 | * Userspace RCU library - test program | |
5 | * | |
6 | * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> | |
7 | * | |
8 | * Distributed under GPLv2 | |
9 | */ | |
10 | ||
ac260fd9 | 11 | #include <stdio.h> |
f69f195a MD |
12 | #include <pthread.h> |
13 | #include <stdlib.h> | |
41718ff9 | 14 | #include <string.h> |
f69f195a MD |
15 | #include <sys/types.h> |
16 | #include <sys/wait.h> | |
17 | #include <unistd.h> | |
18 | #include <stdio.h> | |
41718ff9 | 19 | #include <assert.h> |
ac260fd9 MD |
20 | #include "urcu.h" |
21 | ||
41718ff9 MD |
22 | struct test_array { |
23 | int a; | |
24 | int b; | |
25 | char c[200]; | |
26 | }; | |
27 | ||
28 | static struct test_array *test_rcu_pointer; | |
29 | ||
b1b5ce8f | 30 | #define NR_READ 10 |
8c8eed97 | 31 | #define NR_WRITE 9 |
f69f195a MD |
32 | |
33 | ||
34 | void *thr_reader(void *arg) | |
35 | { | |
8c8eed97 | 36 | int qparity, i, j; |
41718ff9 MD |
37 | struct test_array *local_ptr; |
38 | ||
f69f195a MD |
39 | printf("thread %s, thread id : %lu, pid %lu\n", |
40 | "reader", pthread_self(), getpid()); | |
41 | sleep(2); | |
42 | ||
43 | urcu_register_thread(); | |
44 | ||
8c8eed97 MD |
45 | for (i = 0; i < 1000; i++) { |
46 | for (j = 0; j < 100000000; j++) { | |
47 | qparity = rcu_read_lock(); | |
48 | local_ptr = rcu_dereference(test_rcu_pointer); | |
49 | if (local_ptr) { | |
50 | assert(local_ptr->a == 8); | |
51 | assert(local_ptr->b == 12); | |
52 | assert(local_ptr->c[55] == 2); | |
53 | } | |
54 | rcu_read_unlock(qparity); | |
41718ff9 | 55 | } |
41718ff9 | 56 | } |
f69f195a MD |
57 | |
58 | urcu_unregister_thread(); | |
41718ff9 | 59 | |
f69f195a MD |
60 | return ((void*)1); |
61 | ||
62 | } | |
63 | ||
64 | void *thr_writer(void *arg) | |
65 | { | |
66 | int i; | |
41718ff9 | 67 | struct test_array *new, *old; |
f69f195a MD |
68 | |
69 | printf("thread %s, thread id : %lu, pid %lu\n", | |
70 | "writer", pthread_self(), getpid()); | |
71 | sleep(2); | |
72 | ||
8c8eed97 | 73 | for (i = 0; i < 100000; i++) { |
41718ff9 MD |
74 | rcu_write_lock(); |
75 | new = malloc(sizeof(struct test_array)); | |
76 | old = test_rcu_pointer; | |
77 | if (old) { | |
78 | assert(old->a == 8); | |
79 | assert(old->b == 12); | |
80 | assert(old->c[55] == 2); | |
81 | } | |
8c8eed97 MD |
82 | new->a = 8; |
83 | new->b = 12; | |
84 | new->c[55] = 2; | |
41718ff9 MD |
85 | old = urcu_publish_content(&test_rcu_pointer, new); |
86 | rcu_write_unlock(); | |
87 | /* can be done after unlock */ | |
8c8eed97 MD |
88 | if (old) { |
89 | old->a = 0; | |
90 | old->b = 0; | |
91 | old->c[55] = 0; | |
92 | } | |
41718ff9 | 93 | free(old); |
8c8eed97 | 94 | usleep(1); |
f69f195a MD |
95 | } |
96 | ||
97 | return ((void*)2); | |
98 | } | |
ac260fd9 MD |
99 | |
100 | int main() | |
101 | { | |
f69f195a MD |
102 | int err; |
103 | pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE]; | |
104 | void *tret; | |
105 | int i; | |
106 | ||
107 | for (i = 0; i < NR_READ; i++) { | |
108 | err = pthread_create(&tid_reader[i], NULL, thr_reader, NULL); | |
109 | if (err != 0) | |
110 | exit(1); | |
111 | } | |
112 | for (i = 0; i < NR_WRITE; i++) { | |
113 | err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL); | |
114 | if (err != 0) | |
115 | exit(1); | |
116 | } | |
117 | ||
118 | sleep(10); | |
ac260fd9 | 119 | |
f69f195a MD |
120 | for (i = 0; i < NR_WRITE; i++) { |
121 | err = pthread_join(tid_reader[i], &tret); | |
122 | if (err != 0) | |
123 | exit(1); | |
124 | } | |
125 | for (i = 0; i < NR_WRITE; i++) { | |
126 | err = pthread_join(tid_writer[i], &tret); | |
127 | if (err != 0) | |
128 | exit(1); | |
129 | } | |
ac260fd9 | 130 | |
f69f195a | 131 | return 0; |
ac260fd9 | 132 | } |