38 lines
1008 B
Groff
38 lines
1008 B
Groff
.\" Copyright (C) 2020 Jens Axboe <axboe@kernel.dk>
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.\" Copyright (C) 2020 Red Hat, Inc.
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.\"
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.\" SPDX-License-Identifier: LGPL-2.0-or-later
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.\"
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.TH io_uring_get_sqe 3 "July 10, 2020" "liburing-0.7" "liburing Manual"
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.SH NAME
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io_uring_get_sqe - get the next vacant event from the submission queue
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.SH SYNOPSIS
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.nf
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.BR "#include <liburing.h>"
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.PP
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.BI "struct io_uring_sqe *io_uring_get_sqe(struct io_uring " *ring );
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.fi
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.PP
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.SH DESCRIPTION
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.PP
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The io_uring_get_sqe() function gets the next vacant event from the submission
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queue belonging to the
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.I ring
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param.
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On success io_uring_get_sqe() returns a pointer to the submission queue event.
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On failure NULL is returned.
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If a submission queue event is returned, it should be filled out via one of the
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prep functions such as
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.BR io_uring_prep_read (3)
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and submitted via
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.BR io_uring_submit (3).
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.SH RETURN VALUE
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.BR io_uring_get_sqe (3)
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returns a pointer to the next submission queue event on success and NULL on
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failure.
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.SH SEE ALSO
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.BR io_uring_submit (3)
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