/* SPDX-License-Identifier: MIT */

/*

 * Description: run various nop tests

 *

 */

#include <errno.h>

#include <stdio.h>

#include <unistd.h>

#include <stdlib.h>

#include <string.h>

#include <fcntl.h>

#include "liburing.h"

static int test_single_nop(struct io_uring *ring)

{

	struct io_uring_cqe *cqe;

	struct io_uring_sqe *sqe;

	int ret;

	sqe = io_uring_get_sqe(ring);

	if (!sqe) {

		fprintf(stderr, "get sqe failed\n");

		goto err;

	}

	io_uring_prep_nop(sqe);

	ret = io_uring_submit(ring);

	if (ret <= 0) {

		fprintf(stderr, "sqe submit failed: %d\n", ret);

		goto err;

	}

	ret = io_uring_wait_cqe(ring, &cqe);

	if (ret < 0) {

		fprintf(stderr, "wait completion %d\n", ret);

		goto err;

	}

	io_uring_cqe_seen(ring, cqe);

	return 0;

err:

	return 1;

}

static int test_barrier_nop(struct io_uring *ring)

{

	struct io_uring_cqe *cqe;

	struct io_uring_sqe *sqe;

	int ret, i;

	for (i = 0; i < 8; i++) {

		sqe = io_uring_get_sqe(ring);

		if (!sqe) {

			fprintf(stderr, "get sqe failed\n");

			goto err;

		}

		io_uring_prep_nop(sqe);

		if (i == 4)

			sqe->flags = IOSQE_IO_DRAIN;

	}

	ret = io_uring_submit(ring);

	if (ret < 0) {

		fprintf(stderr, "sqe submit failed: %d\n", ret);

		goto err;

	} else if (ret < 8) {

		fprintf(stderr, "Submitted only %d\n", ret);

		goto err;

	}

	for (i = 0; i < 8; i++) {

		ret = io_uring_wait_cqe(ring, &cqe);

		if (ret < 0) {

			fprintf(stderr, "wait completion %d\n", ret);

			goto err;

		}

		io_uring_cqe_seen(ring, cqe);

	}

	return 0;

err:

	return 1;

}

int main(int argc, char *argv[])

{

	struct io_uring ring;

	int ret;

	if (argc > 1)

		return 0;

	ret = io_uring_queue_init(8, &ring, 0);

	if (ret) {

		fprintf(stderr, "ring setup failed: %d\n", ret);

		return 1;

	}

	ret = test_single_nop(&ring);

	if (ret) {

		fprintf(stderr, "test_single_nop failed\n");

		return ret;

	}

	ret = test_barrier_nop(&ring);

	if (ret) {

		fprintf(stderr, "test_barrier_nop failed\n");

		return ret;

	}

	return 0;

}