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+= nng_aio_finish(3)
+:doctype: manpage
+:manmanual: nng
+:mansource: nng
+:manvolnum: 3
+:copyright: Copyright 2018 mailto:info@staysail.tech[Staysail Systems, Inc.] + \
+            Copyright 2018 mailto:info@capitar.com[Capitar IT Group BV] + \
+            {blank} + \
+            This document is supplied under the terms of the \
+            https://opensource.org/licenses/MIT[MIT License].
+
+== NAME
+
+nng_aio_finish - finish asynchronous I/O operation
+
+== SYNOPSIS
+
+[source, c]
+-----------
+#include <nng/nng.h>
+
+void nng_aio_finish(nng_aio *aio, int err);
+-----------
+
+
+== DESCRIPTION
+
+The `nng_aio_finish()` function marks operation associated with _aio_ as
+complete, with the status _err_.  This will be the result returned by
+<<nng_aio_result#,nng_aio_result(3)>>.
+
+This function causes the callback associated with the _aio_ to called.
+
+WARNING: It is mandatory that operation "providers" call this function
+*EXACTLY ONCE* when they are finished with the operation.  After calling this
+function they *MUST NOT* perform any further accesses the _aio_.
+
+WARNING: This function is only for I/O providers (those actually performing
+the operation such as HTTP handler function or a transport provider); ordinary
+users of the _aio_ should not have any need for this function.
+
+== RETURN VALUES
+
+None.
+
+== ERRORS
+
+None.
+
+== SEE ALSO
+
+<<nng_aio_alloc#,nng_aio_alloc(3)>>,
+<<nng_aio_cancel#,nng_aio_cancel(3)>>,
+<<nng_aio_result#,nng_aio_result(3)>>,
+<<nng#,nng(7)>>
+
+== COPYRIGHT
+
+{copyright}