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Diffstat (limited to 'man/io_uring_wait_cqe_nr.3')
| -rw-r--r-- | man/io_uring_wait_cqe_nr.3 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/man/io_uring_wait_cqe_nr.3 b/man/io_uring_wait_cqe_nr.3 new file mode 100644 index 0000000..5a4a5d5 --- /dev/null +++ b/man/io_uring_wait_cqe_nr.3 @@ -0,0 +1,43 @@ +.\" Copyright (C) 2021 Stefan Roesch <shr@fb.com> +.\" +.\" SPDX-License-Identifier: LGPL-2.0-or-later +.\" +.TH io_uring_wait_cqe_nr 3 "November 15, 2021" "liburing-2.1" "liburing Manual" +.SH NAME +io_uring_wait_cqe_nr \- wait for one or more io_uring completion events +.SH SYNOPSIS +.nf +.B #include <liburing.h> +.PP +.BI "int io_uring_wait_cqe_nr(struct io_uring *" ring "," +.BI " struct io_uring_cqe **" cqe_ptr "," +.BI " unsigned " wait_nr ");" +.fi +.SH DESCRIPTION +.PP +The +.BR io_uring_wait_cqe_nr (3) +function returns +.I wait_nr +IO completion events from the queue belonging to the +.I ring +param, waiting for it if necessary. If the requested number of events are +already available in the ring when invoked, no waiting will occur. The +.I cqe_ptr +param is filled in on success. + +After the caller has submitted a request with +.BR io_uring_submit (3), +the application can retrieve the completion with +.BR io_uring_wait_cqe (3). + +.SH RETURN VALUE +On success +.BR io_uring_wait_cqe_nr (3) +returns 0 and the cqe_ptr parm is filled in. On failure it returns +.BR -errno . +The return value indicates the result of waiting for a CQE, and it has no +relation to the CQE result itself. +.SH SEE ALSO +.BR io_uring_submit (3), +.BR io_uring_wait_cqes (3) |