.\" Copyright (C) 2020 Jens Axboe <axboe@kernel.dk>
.\" Copyright (C) 2020 Red Hat, Inc.
.\"
.\" SPDX-License-Identifier: LGPL-2.0-or-later
.\"
.TH io_uring_get_sqe 3 "July 10, 2020" "liburing-0.7" "liburing Manual"
.SH NAME
io_uring_get_sqe - get the next vacant event from the submission queue
.SH SYNOPSIS
.nf
.BR "#include <liburing.h>"
.PP
.BI "struct io_uring_sqe *io_uring_get_sqe(struct io_uring " *ring );
.fi
.PP
.SH DESCRIPTION
.PP
The io_uring_get_sqe() function gets the next vacant event from the submission
queue belonging to the
.I ring
param.

On success io_uring_get_sqe() returns a pointer to the submission queue event.
On failure NULL is returned.

If a submission queue event is returned, it should be filled out via one of the
prep functions such as
.BR io_uring_prep_read (3)
and submitted via
.BR io_uring_submit (3).

.SH RETURN VALUE
.BR io_uring_get_sqe (3)
returns a pointer to the next submission queue event on success and NULL on
failure.
.SH SEE ALSO
.BR io_uring_submit (3)