1= nng_aio_get_input(3) 2// 3// Copyright 2018 Staysail Systems, Inc. <info@staysail.tech> 4// Copyright 2018 Capitar IT Group BV <info@capitar.com> 5// 6// This document is supplied under the terms of the MIT License, a 7// copy of which should be located in the distribution where this 8// file was obtained (LICENSE.txt). A copy of the license may also be 9// found online at https://opensource.org/licenses/MIT. 10// 11 12== NAME 13 14nng_aio_get_input - return input parameter 15 16== SYNOPSIS 17 18[source, c] 19---- 20#include <nng/nng.h> 21 22void *nng_aio_get_input(nng_aio *aio, unsigned int index); 23---- 24 25== DESCRIPTION 26 27The `nng_aio_get_input()` function returns the value of the input parameter 28previously set at _index_ on _aio_ with the 29xref:nng_aio_set_input.3.adoc[`nng_aio_set_input()`] function. 30 31The valid values of _index_ range from zero (0) to three (3), as no operation 32currently defined can accept more than four parameters. 33(This limit could increase in the future.) 34If the index supplied is outside of this range, 35or of the input parameter was not previously set, then `NULL` is returned. 36 37== RETURN VALUES 38 39Value previously set, or `NULL`. 40 41== ERRORS 42 43None. 44 45== SEE ALSO 46 47[.text-left] 48xref:nng_aio_alloc.3.adoc[nng_aio_alloc(3)], 49xref:nng_aio_get_output.3.adoc[nng_aio_get_output(3)], 50xref:nng_aio_set_input.3.adoc[nng_aio_set_input(3)], 51xref:nng_aio_result.3.adoc[nng_aio_result(3)], 52xref:nng_aio.5.adoc[nng_aio(5)], 53xref:nng.7.adoc[nng(7)] 54