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| author | Garrett D'Amore <garrett@damore.org> | 2019-12-29 23:21:33 -0800 |
|---|---|---|
| committer | Garrett D'Amore <garrett@damore.org> | 2019-12-29 23:21:33 -0800 |
| commit | 74a12ffc8b37f2dae4b3002e86f33b8ca52df22d (patch) | |
| tree | 48071f89f65d57e20ccd1b99e7b13032f8658e2c /man/v1.2/nn_allocmsg.3compat.html | |
| parent | a18df33c9e0f8bed6a47c117e135369ed8fbd785 (diff) | |
| download | nng-74a12ffc8b37f2dae4b3002e86f33b8ca52df22d.tar.gz nng-74a12ffc8b37f2dae4b3002e86f33b8ca52df22d.tar.bz2 nng-74a12ffc8b37f2dae4b3002e86f33b8ca52df22d.zip | |
man page updates for 1.2
Diffstat (limited to 'man/v1.2/nn_allocmsg.3compat.html')
| -rw-r--r-- | man/v1.2/nn_allocmsg.3compat.html | 631 |
1 files changed, 631 insertions, 0 deletions
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.tok-il { color: #666666 } /* Literal.Number.Integer.Long */ +</style> +</head> +<body class="manpage toc2 toc-left"> +<div id="header"> +<h1>nn_allocmsg(3compat) Manual Page</h1> +<div id="toc" class="toc2"> +<div id="toctitle">Table of Contents</div> +<ul class="sectlevel1"> +<li><a href="#_synopsis">SYNOPSIS</a></li> +<li><a href="#_description">DESCRIPTION</a></li> +<li><a href="#_return_values">RETURN VALUES</a></li> +<li><a href="#_errors">ERRORS</a></li> +<li><a href="#_see_also">SEE ALSO</a></li> +</ul> +</div> +<h2>NAME</h2> +<div class="sectionbody"> +<p>nn_allocmsg - allocate message (compatible API)</p> +</div> +</div> +<div id="content"> +<div class="sect1"> +<h2 id="_synopsis">SYNOPSIS</h2> +<div class="sectionbody"> +<div class="listingblock"> +<div class="content"> +<pre class="pygments highlight"><code data-lang="c"><span></span><span class="tok-cp">#include</span> <span class="tok-cpf"><nanomsg/nn.h></span><span class="tok-cp"></span> + +<span class="tok-kt">void</span> <span class="tok-o">*</span><span class="tok-nf">nn_allocmsg</span><span class="tok-p">(</span><span class="tok-kt">size_t</span> <span class="tok-n">size</span><span class="tok-p">,</span> <span class="tok-kt">int</span> <span class="tok-n">type</span><span class="tok-p">);</span></code></pre> +</div> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_description">DESCRIPTION</h2> +<div class="sectionbody"> +<div class="paragraph"> +<p>The <code>nn_allocmsg()</code> allocates a message structure of size <em>size</em>, and is +primarily used to support zero-copy send operations, making use of the +<code>NNG_MSG</code> special size indicator. +The value returned is a pointer to the start of the message payload buffer.</p> +</div> +<div class="paragraph"> +<p>The value of <em>size</em> must be positive, and small enough to hold reasonable +message data plus book-keeping information.</p> +</div> +<div class="admonitionblock note"> +<table> +<tr> +<td class="icon"> +<i class="fa icon-note" title="Note"></i> +</td> +<td class="content"> +This function is provided for API +<a href="#nng_compat.3compat.adoc">compatibility</a> with legacy <em>libnanomsg</em>. +Consider using the relevant <a href="#libnng.3.adoc">modern API</a> instead. +</td> +</tr> +</table> +</div> +<div class="paragraph"> +<p>The value of <em>type</em> <strong>must</strong> be zero. +(This argument was reserved to support different kinds of memory spaces +for RDMA devices, but this was never developed in the legacy API.)</p> +</div> +<div class="paragraph"> +<p>The returned message must be disposed of by either +<a href="#nn_freemsg.3compat.adoc"><code>nn_freemsg()</code></a> or +<a href="#nn_send.3compat.adoc"><code>nn_send()</code></a> when the caller is finished with it.</p> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_return_values">RETURN VALUES</h2> +<div class="sectionbody"> +<div class="paragraph"> +<p>This function returns a pointer to message buffer space, or <code>NULL</code> +on failure.</p> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_errors">ERRORS</h2> +<div class="sectionbody"> +<div class="hdlist"> +<table> +<tr> +<td class="hdlist1"> +<code>ENOMEM</code> +</td> +<td class="hdlist2"> +<p>Insufficient memory is available.</p> +</td> +</tr> +<tr> +<td class="hdlist1"> +<code>EINVAL</code> +</td> +<td class="hdlist2"> +<p>An invalid <em>size</em> or <em>type</em> was specified.</p> +</td> +</tr> +<tr> +<td class="hdlist1"> +<code>ETERM</code> +</td> +<td class="hdlist2"> +<p>The library is shutting down.</p> +</td> +</tr> +</table> +</div> +</div> +</div> +<div class="sect1"> +<h2 id="_see_also">SEE ALSO</h2> +<div class="sectionbody"> +<div class="paragraph text-left"> +<p><a href="#nn_errno.3compat.adoc">nn_errno(3compat)</a>, +<a href="#nn_freemsg.3compat.adoc">nn_freemsg(3compat)</a>, +<a href="#nn_reallocmsg.3compat.adoc">nn_reallocmsg(3compat)</a>, +<a href="#nn_send.3compat.adoc">nn_send(3compat)</a>, +<a href="#nng_compat.3compat.adoc">nng_compat(3compat)</a>, +<a href="#nng.7.adoc">nng(7)</a></p> +</div> +</div> +</div> +</div> +</body> +</html> |
