Commit | Line | Data |
---|---|---|
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> |
87bd15cd BW |
20 | #include <sys/syscall.h> |
21 | ||
22 | #if defined(_syscall0) | |
23 | _syscall0(pid_t, gettid) | |
24 | #elif defined(__NR_gettid) | |
25 | static inline pid_t gettid(void) | |
26 | { | |
27 | return syscall(__NR_gettid); | |
28 | } | |
29 | #else | |
30 | #warning "use pid as tid" | |
31 | static inline pid_t gettid(void) | |
32 | { | |
33 | return getpid(); | |
34 | } | |
35 | #endif | |
36 | ||
ac260fd9 MD |
37 | #include "urcu.h" |
38 | ||
41718ff9 MD |
39 | struct test_array { |
40 | int a; | |
41 | int b; | |
42 | char c[200]; | |
43 | }; | |
44 | ||
45 | static struct test_array *test_rcu_pointer; | |
46 | ||
b1b5ce8f | 47 | #define NR_READ 10 |
8c8eed97 | 48 | #define NR_WRITE 9 |
f69f195a | 49 | |
c265818b MD |
50 | pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER; |
51 | ||
52 | void rcu_copy_mutex_lock(void) | |
53 | { | |
54 | int ret; | |
55 | ret = pthread_mutex_lock(&rcu_copy_mutex); | |
56 | if (ret) { | |
57 | perror("Error in pthread mutex lock"); | |
58 | exit(-1); | |
59 | } | |
60 | } | |
61 | ||
62 | void rcu_copy_mutex_unlock(void) | |
63 | { | |
64 | int ret; | |
65 | ||
66 | ret = pthread_mutex_unlock(&rcu_copy_mutex); | |
67 | if (ret) { | |
68 | perror("Error in pthread mutex unlock"); | |
69 | exit(-1); | |
70 | } | |
71 | } | |
f69f195a MD |
72 | |
73 | void *thr_reader(void *arg) | |
74 | { | |
8c8eed97 | 75 | int qparity, i, j; |
41718ff9 MD |
76 | struct test_array *local_ptr; |
77 | ||
87bd15cd BW |
78 | printf("thread %s, thread id : %lx, tid %lu\n", |
79 | "reader", pthread_self(), (unsigned long)gettid()); | |
f69f195a MD |
80 | sleep(2); |
81 | ||
82 | urcu_register_thread(); | |
83 | ||
ad6ce6ae | 84 | for (i = 0; i < 100000; i++) { |
8c8eed97 | 85 | for (j = 0; j < 100000000; j++) { |
c265818b | 86 | rcu_read_lock(&qparity); |
8c8eed97 MD |
87 | local_ptr = rcu_dereference(test_rcu_pointer); |
88 | if (local_ptr) { | |
89 | assert(local_ptr->a == 8); | |
90 | assert(local_ptr->b == 12); | |
91 | assert(local_ptr->c[55] == 2); | |
92 | } | |
c265818b | 93 | rcu_read_unlock(&qparity); |
41718ff9 | 94 | } |
41718ff9 | 95 | } |
f69f195a MD |
96 | |
97 | urcu_unregister_thread(); | |
41718ff9 | 98 | |
f69f195a MD |
99 | return ((void*)1); |
100 | ||
101 | } | |
102 | ||
103 | void *thr_writer(void *arg) | |
104 | { | |
105 | int i; | |
41718ff9 | 106 | struct test_array *new, *old; |
f69f195a | 107 | |
87bd15cd BW |
108 | printf("thread %s, thread id : %lx, tid %lu\n", |
109 | "writer", pthread_self(), (unsigned long)gettid()); | |
f69f195a MD |
110 | sleep(2); |
111 | ||
ad6ce6ae | 112 | for (i = 0; i < 10000000; i++) { |
41718ff9 | 113 | new = malloc(sizeof(struct test_array)); |
c265818b | 114 | rcu_copy_mutex_lock(); |
41718ff9 MD |
115 | old = test_rcu_pointer; |
116 | if (old) { | |
117 | assert(old->a == 8); | |
118 | assert(old->b == 12); | |
119 | assert(old->c[55] == 2); | |
120 | } | |
8c8eed97 | 121 | new->c[55] = 2; |
ad6ce6ae MD |
122 | new->b = 12; |
123 | new->a = 8; | |
cdcb92bb | 124 | old = urcu_publish_content((void **)&test_rcu_pointer, new); |
c265818b | 125 | rcu_copy_mutex_unlock(); |
41718ff9 | 126 | /* can be done after unlock */ |
8c8eed97 MD |
127 | if (old) { |
128 | old->a = 0; | |
129 | old->b = 0; | |
130 | old->c[55] = 0; | |
131 | } | |
41718ff9 | 132 | free(old); |
8c8eed97 | 133 | usleep(1); |
f69f195a MD |
134 | } |
135 | ||
136 | return ((void*)2); | |
137 | } | |
ac260fd9 MD |
138 | |
139 | int main() | |
140 | { | |
f69f195a MD |
141 | int err; |
142 | pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE]; | |
143 | void *tret; | |
144 | int i; | |
145 | ||
87bd15cd BW |
146 | printf("thread %-6s, thread id : %lx, tid %lu\n", |
147 | "main", pthread_self(), (unsigned long)gettid()); | |
148 | ||
f69f195a MD |
149 | for (i = 0; i < NR_READ; i++) { |
150 | err = pthread_create(&tid_reader[i], NULL, thr_reader, NULL); | |
151 | if (err != 0) | |
152 | exit(1); | |
153 | } | |
154 | for (i = 0; i < NR_WRITE; i++) { | |
155 | err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL); | |
156 | if (err != 0) | |
157 | exit(1); | |
158 | } | |
159 | ||
160 | sleep(10); | |
ac260fd9 | 161 | |
20bf310a | 162 | for (i = 0; i < NR_READ; i++) { |
f69f195a MD |
163 | err = pthread_join(tid_reader[i], &tret); |
164 | if (err != 0) | |
165 | exit(1); | |
166 | } | |
167 | for (i = 0; i < NR_WRITE; i++) { | |
168 | err = pthread_join(tid_writer[i], &tret); | |
169 | if (err != 0) | |
170 | exit(1); | |
171 | } | |
20bf310a | 172 | free(test_rcu_pointer); |
ac260fd9 | 173 | |
f69f195a | 174 | return 0; |
ac260fd9 | 175 | } |