1 /* SPDX-License-Identifier: MIT */
2 /*
3 * Description: test CQ ready
4 *
5 */
6 #include <errno.h>
7 #include <stdio.h>
8 #include <unistd.h>
9 #include <stdlib.h>
10 #include <string.h>
11 #include <fcntl.h>
12
13 #include "liburing.h"
14 #include "helpers.h"
15
queue_n_nops(struct io_uring * ring,int n)16 static int queue_n_nops(struct io_uring *ring, int n)
17 {
18 struct io_uring_sqe *sqe;
19 int i, ret;
20
21 for (i = 0; i < n; i++) {
22 sqe = io_uring_get_sqe(ring);
23 if (!sqe) {
24 printf("get sqe failed\n");
25 goto err;
26 }
27
28 io_uring_prep_nop(sqe);
29 }
30
31 ret = io_uring_submit(ring);
32 if (ret < n) {
33 printf("Submitted only %d\n", ret);
34 goto err;
35 } else if (ret < 0) {
36 printf("sqe submit failed: %d\n", ret);
37 goto err;
38 }
39
40 return 0;
41 err:
42 return 1;
43 }
44
45 #define CHECK_READY(ring, expected) do {\
46 ready = io_uring_cq_ready((ring));\
47 if (ready != expected) {\
48 printf("Got %d CQs ready, expected %d\n", ready, expected);\
49 goto err;\
50 }\
51 } while(0)
52
main(int argc,char * argv[])53 int main(int argc, char *argv[])
54 {
55 struct io_uring ring;
56 int ret;
57 unsigned ready;
58
59 if (argc > 1)
60 return T_EXIT_SKIP;
61
62 ret = io_uring_queue_init(4, &ring, 0);
63 if (ret) {
64 printf("ring setup failed\n");
65 return T_EXIT_FAIL;
66
67 }
68
69 CHECK_READY(&ring, 0);
70 if (queue_n_nops(&ring, 4))
71 goto err;
72
73 CHECK_READY(&ring, 4);
74 io_uring_cq_advance(&ring, 4);
75 CHECK_READY(&ring, 0);
76 if (queue_n_nops(&ring, 4))
77 goto err;
78
79 CHECK_READY(&ring, 4);
80
81 io_uring_cq_advance(&ring, 1);
82 CHECK_READY(&ring, 3);
83
84 io_uring_cq_advance(&ring, 2);
85 CHECK_READY(&ring, 1);
86
87 io_uring_cq_advance(&ring, 1);
88 CHECK_READY(&ring, 0);
89
90 io_uring_queue_exit(&ring);
91 return T_EXIT_PASS;
92 err:
93 io_uring_queue_exit(&ring);
94 return T_EXIT_FAIL;
95 }
96