#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>

#include <liburing.h>

int main(int argc, char *argv[])
{
	struct io_uring_sqe *sqe;
	struct io_uring ring;
	unsigned long *ptr = NULL;
	char buf[16384];
	char fname[32];
	int fd[4];
	int i;

	for (i = 0; i < 4; i++) {
		sprintf(fname, "/dev/shm/test.%d", i);
		fd[i] = open(fname, O_RDWR | O_CREAT, 0644);
		if (fd[i] < 0) {
			perror("open");
			return 1;
		}
	}

	io_uring_queue_init(32, &ring, 0);

	for (i = 0; i < 32; i++) {
		unsigned long off = 16384 * (i / 4);
		int index = i & 3;

		sqe = io_uring_get_sqe(&ring);
		io_uring_prep_write(sqe, fd[index], buf, sizeof(buf), off);
	}

	io_uring_submit(&ring);
	usleep(1000);

	*ptr = 0x1234;
}