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> |
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 MD |
49 | |
50 | ||
51 | void *thr_reader(void *arg) | |
52 | { | |
8c8eed97 | 53 | int qparity, i, j; |
41718ff9 MD |
54 | struct test_array *local_ptr; |
55 | ||
87bd15cd BW |
56 | printf("thread %s, thread id : %lx, tid %lu\n", |
57 | "reader", pthread_self(), (unsigned long)gettid()); | |
f69f195a MD |
58 | sleep(2); |
59 | ||
60 | urcu_register_thread(); | |
61 | ||
ad6ce6ae | 62 | for (i = 0; i < 100000; i++) { |
8c8eed97 MD |
63 | for (j = 0; j < 100000000; j++) { |
64 | qparity = rcu_read_lock(); | |
65 | local_ptr = rcu_dereference(test_rcu_pointer); | |
66 | if (local_ptr) { | |
67 | assert(local_ptr->a == 8); | |
68 | assert(local_ptr->b == 12); | |
69 | assert(local_ptr->c[55] == 2); | |
70 | } | |
71 | rcu_read_unlock(qparity); | |
41718ff9 | 72 | } |
41718ff9 | 73 | } |
f69f195a MD |
74 | |
75 | urcu_unregister_thread(); | |
41718ff9 | 76 | |
f69f195a MD |
77 | return ((void*)1); |
78 | ||
79 | } | |
80 | ||
81 | void *thr_writer(void *arg) | |
82 | { | |
83 | int i; | |
41718ff9 | 84 | struct test_array *new, *old; |
f69f195a | 85 | |
87bd15cd BW |
86 | printf("thread %s, thread id : %lx, tid %lu\n", |
87 | "writer", pthread_self(), (unsigned long)gettid()); | |
f69f195a MD |
88 | sleep(2); |
89 | ||
ad6ce6ae | 90 | for (i = 0; i < 10000000; i++) { |
41718ff9 | 91 | new = malloc(sizeof(struct test_array)); |
ad6ce6ae | 92 | rcu_write_lock(); |
41718ff9 MD |
93 | old = test_rcu_pointer; |
94 | if (old) { | |
95 | assert(old->a == 8); | |
96 | assert(old->b == 12); | |
97 | assert(old->c[55] == 2); | |
98 | } | |
8c8eed97 | 99 | new->c[55] = 2; |
ad6ce6ae MD |
100 | new->b = 12; |
101 | new->a = 8; | |
cdcb92bb | 102 | old = urcu_publish_content((void **)&test_rcu_pointer, new); |
41718ff9 MD |
103 | rcu_write_unlock(); |
104 | /* can be done after unlock */ | |
8c8eed97 MD |
105 | if (old) { |
106 | old->a = 0; | |
107 | old->b = 0; | |
108 | old->c[55] = 0; | |
109 | } | |
41718ff9 | 110 | free(old); |
8c8eed97 | 111 | usleep(1); |
f69f195a MD |
112 | } |
113 | ||
114 | return ((void*)2); | |
115 | } | |
ac260fd9 MD |
116 | |
117 | int main() | |
118 | { | |
f69f195a MD |
119 | int err; |
120 | pthread_t tid_reader[NR_READ], tid_writer[NR_WRITE]; | |
121 | void *tret; | |
122 | int i; | |
123 | ||
87bd15cd BW |
124 | printf("thread %-6s, thread id : %lx, tid %lu\n", |
125 | "main", pthread_self(), (unsigned long)gettid()); | |
126 | ||
f69f195a MD |
127 | for (i = 0; i < NR_READ; i++) { |
128 | err = pthread_create(&tid_reader[i], NULL, thr_reader, NULL); | |
129 | if (err != 0) | |
130 | exit(1); | |
131 | } | |
132 | for (i = 0; i < NR_WRITE; i++) { | |
133 | err = pthread_create(&tid_writer[i], NULL, thr_writer, NULL); | |
134 | if (err != 0) | |
135 | exit(1); | |
136 | } | |
137 | ||
138 | sleep(10); | |
ac260fd9 | 139 | |
20bf310a | 140 | for (i = 0; i < NR_READ; i++) { |
f69f195a MD |
141 | err = pthread_join(tid_reader[i], &tret); |
142 | if (err != 0) | |
143 | exit(1); | |
144 | } | |
145 | for (i = 0; i < NR_WRITE; i++) { | |
146 | err = pthread_join(tid_writer[i], &tret); | |
147 | if (err != 0) | |
148 | exit(1); | |
149 | } | |
20bf310a | 150 | free(test_rcu_pointer); |
ac260fd9 | 151 | |
f69f195a | 152 | return 0; |
ac260fd9 | 153 | } |