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
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
#include <sys/eventfd.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <fcntl.h>
#include <poll.h>
#include <sys/time.h>
#include "liburing.h"
struct thread_data {
struct io_uring *ring;
int write_fd;
};
static void error_exit(char *message)
{
perror(message);
exit(1);
}
static void *listener_thread(void *data)
{
struct thread_data *td = data;
struct io_uring_cqe *cqe;
int ret;
ret = io_uring_wait_cqe(td->ring, &cqe);
if (ret < 0) {
fprintf(stderr, "Error waiting for completion: %s\n",
strerror(-ret));
goto err;
}
if (cqe->res < 0) {
fprintf(stderr, "Error in async operation: %s\n", strerror(-cqe->res));
goto err;
}
io_uring_cqe_seen(td->ring, cqe);
return NULL;
err:
return (void *) 1;
}
static void *wakeup_io_uring(void *data)
{
struct thread_data *td = data;
int res;
res = eventfd_write(td->write_fd, (eventfd_t) 1L);
if (res < 0) {
perror("eventfd_write");
return (void *) 1;
}
return NULL;
}
static int test_pipes(void)
{
struct io_uring_sqe *sqe;
struct thread_data td;
struct io_uring ring;
pthread_t t1, t2;
int ret, fds[2];
void *pret;
if (pipe(fds) < 0)
error_exit("eventfd");
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "Unable to setup io_uring: %s\n", strerror(-ret));
return 1;
}
td.write_fd = fds[1];
td.ring = ˚
sqe = io_uring_get_sqe(&ring);
io_uring_prep_poll_add(sqe, fds[0], POLLIN);
sqe->user_data = 2;
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "ring_submit=%d\n", ret);
return 1;
}
pthread_create(&t1, NULL, listener_thread, &td);
sleep(1);
pthread_create(&t2, NULL, wakeup_io_uring, &td);
pthread_join(t1, &pret);
io_uring_queue_exit(&ring);
return pret != NULL;
}
static int test_eventfd(void)
{
struct io_uring_sqe *sqe;
struct thread_data td;
struct io_uring ring;
pthread_t t1, t2;
int efd, ret;
void *pret;
efd = eventfd(0, 0);
if (efd < 0)
error_exit("eventfd");
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "Unable to setup io_uring: %s\n", strerror(-ret));
return 1;
}
td.write_fd = efd;
td.ring = ˚
sqe = io_uring_get_sqe(&ring);
io_uring_prep_poll_add(sqe, efd, POLLIN);
sqe->user_data = 2;
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "ring_submit=%d\n", ret);
return 1;
}
pthread_create(&t1, NULL, listener_thread, &td);
sleep(1);
pthread_create(&t2, NULL, wakeup_io_uring, &td);
pthread_join(t1, &pret);
io_uring_queue_exit(&ring);
return pret != NULL;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return 0;
ret = test_pipes();
if (ret) {
fprintf(stderr, "test_pipe failed\n");
return ret;
}
ret = test_eventfd();
if (ret) {
fprintf(stderr, "test_eventfd failed\n");
return ret;
}
return 0;
}
|
