| 20 | #define NR_LOOPS 2 |
| 21 | |
| 22 | static int test(void) |
| 23 | { |
| 24 | struct __kernel_timespec ts; |
| 25 | struct io_uring_cqe *cqe; |
| 26 | struct io_uring_sqe *sqe; |
| 27 | struct io_uring ring; |
| 28 | int ret, evfd, i; |
| 29 | uint64_t val; |
| 30 | |
| 31 | evfd = eventfd(0, EFD_NONBLOCK); |
| 32 | if (evfd < 0) { |
| 33 | perror("eventfd"); |
| 34 | return T_EXIT_FAIL; |
| 35 | } |
| 36 | |
| 37 | ret = io_uring_queue_init(8, &ring, 0); |
| 38 | if (ret) { |
| 39 | fprintf(stderr, "queue_init: %d\n", ret); |
| 40 | close(evfd); |
| 41 | return T_EXIT_FAIL; |
| 42 | } |
| 43 | |
| 44 | ret = io_uring_register_eventfd(&ring, evfd); |
| 45 | if (ret) { |
| 46 | fprintf(stderr, "register_eventfd: %d\n", ret); |
| 47 | close(evfd); |
| 48 | io_uring_queue_exit(&ring); |
| 49 | return T_EXIT_FAIL; |
| 50 | } |
| 51 | |
| 52 | sqe = io_uring_get_sqe(&ring); |
| 53 | io_uring_prep_poll_multishot(sqe, evfd, POLLIN); |
| 54 | sqe->user_data = 1; |
| 55 | |
| 56 | ret = io_uring_submit(&ring); |
| 57 | if (ret != 1) { |
| 58 | fprintf(stderr, "submit: %d\n", ret); |
| 59 | goto err; |
| 60 | } |
| 61 | |
| 62 | for (i = 0; i < NR_LOOPS; i++) { |
| 63 | val = 1; |
| 64 | ret = write(evfd, &val, sizeof(val)); |
| 65 | if (ret != sizeof(val)) { |
| 66 | perror("write"); |
| 67 | goto err; |
| 68 | } |
| 69 | ret = read(evfd, &val, sizeof(val)); |
| 70 | if (ret != sizeof(val)) { |
| 71 | perror("read"); |
| 72 | goto err; |
| 73 | } |
| 74 | |
| 75 | ts.tv_sec = 1; |
| 76 | ts.tv_nsec = 0; |
| 77 | ret = io_uring_wait_cqe_timeout(&ring, &cqe, &ts); |
| 78 | if (ret == -ETIME) { |
| 79 | fprintf(stderr, "poll stuck: no CQE after iteration %d\n", i); |
no test coverage detected