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<?xml version="1.0"?>
<page xmlns="http://projectmallard.org/1.0/"
type="topic"
style="function"
xmlns:api="http://projectmallard.org/experimental/api/"
xmlns:ui="http://projectmallard.org/experimental/ui/"
id="mongoc_socket_sendv">
<info>
<link type="guide" xref="mongoc_socket_t" group="function"/>
</info>
<title>mongoc_socket_sendv()</title>
<section id="synopsis">
<title>Synopsis</title>
<synopsis><code mime="text/x-csrc"><![CDATA[ssize_t
mongoc_socket_sendv (mongoc_socket_t *sock,
mongoc_iovec_t *iov,
size_t iovcnt,
int64_t expire_at);
]]></code></synopsis>
</section>
<section id="parameters">
<title>Parameters</title>
<table>
<tr><td><p>sock</p></td><td><p>A <code xref="mongoc_socket_t">mongoc_socket_t</code>.</p></td></tr>
<tr><td><p>iov</p></td><td><p>A mongoc_iovec_t.</p></td></tr>
<tr><td><p>iovcnt</p></td><td><p>A size_t containing the number of elements in iov.</p></td></tr>
<tr><td><p>expire_at</p></td><td><p>A int64_t with absolute timeout in monotonic time. The monotonic clock is in microseconds and can be fetched using <code xref="bson:clock">bson_get_monotonic_time()</code>.</p></td></tr>
</table>
</section>
<section id="description">
<title>Description</title>
<p>Sends a vector of buffers to the destination. This uses <code>sendmsg()</code> when available to perform a gathered write. If IOV_MAX is reached, a fallback will be used.</p>
</section>
<section id="return">
<title>Returns</title>
<p>the number of bytes sent on success, or -1 on failure and errno is set.</p>
</section>
</page>
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