iouring-hello.c

#include <liburing.h>
#include <stdio.h>
#include <unistd.h>
#include <wchar.h>

int main(void)
{
	struct io_uring ring;
	io_uring_queue_init(1, &ring, 0);

	struct io_uring_sqe *sqe = io_uring_get_sqe(&ring);
        const wchar_t wstr[] = L"Hello, world!\n"
	io_uring_prep_write(sqe, STDOUT_FILENO, wstr, sizeof(wstr) - sizeof(wstr[0]), 0);
	io_uring_submit(&ring);

	struct io_uring_cqe *cqe;
	int ret = io_uring_wait_cqe(&ring, &cqe);
	if (ret < 0) {
		perror("io_uring_wait_cqe");
		return 1;
	}

	if (cqe->res < 0) {
		fprintf(stderr, "Sync write failed.\n");
		return 1;
	}

	io_uring_cqe_seen(&ring, cqe);

	io_uring_queue_exit(&ring);
}