= nng_aio_get_output(3)
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//
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// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech>
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// Copyright 2018 Capitar IT Group BV <info@capitar.com>
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//
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// This document is supplied under the terms of the MIT License, a
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// copy of which should be located in the distribution where this
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// file was obtained (LICENSE.txt). A copy of the license may also be
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// found online at https://opensource.org/licenses/MIT.
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//
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== NAME
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nng_aio_get_output - return output result
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== SYNOPSIS
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[source, c]
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----
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#include <nng/nng.h>
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void *nng_aio_get_output(nng_aio *aio, unsigned int index);
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----
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== DESCRIPTION
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The `nng_aio_get_output()` function returns the output result at _index_
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resulting from the asynchronous operation associated with _aio_.
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The type and semantics of output parameters are determined by specific
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operations.
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NOTE: If the _index_ does not correspond to a defined output for the operation,
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or the operation did not succeed, then the return value will be `NULL`.
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IMPORTANT: It is an error to call this function while the _aio_ is currently
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in use by an active asynchronous operation, or if no operation has been
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performed using the _aio_ yet.
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== RETURN VALUES
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The __index__th result of the operation, or `NULL`.
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== ERRORS
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None.
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== SEE ALSO
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[.text-left]
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xref:nng_aio_alloc.3.adoc[nng_aio_alloc(3)],
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xref:nng_aio_get_output.3.adoc[nng_aio_get_output(3)],
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xref:nng_aio_set_input.3.adoc[nng_aio_set_input(3)],
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xref:nng_aio_result.3.adoc[nng_aio_result(3)],
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xref:nng_aio.5.adoc[nng_aio(5)],
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xref:nng.7.adoc[nng(7)]
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