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<title>PTypes: streams: npserver</title>
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<p><a href="../index.html"><img src="title-21.png" width="253" height="39" alt="C++ Portable Types Library (PTypes) Version 2.1" border="0"></a>
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<p class="hpath"><a href="index.html">Top</a>: <a href="streams.html">Streams</a>:
npserver</p>
<blockquote>
<pre class="lang">#include <pstreams.h>
class npserver {
npserver(string pipename);
bool serve(namedpipe& client, int timeout = -1);
}</pre>
</blockquote>
<p>The <span class="lang">npserver</span> class is used on the server side of
an interprocess communication channel. It listens to connections on the specified
named pipe or a local UNIX socket and for each connection provides a <span class="lang">namedpipe</span>
object for exchanging data with the peer.</p>
<p>Please, read the introduction to <a href="streams.namedpipe.html">namedpipe</a>
first.</p>
<p><span class="def">npserver::npserver(string pipename)</span> creates a named
pipe server object. The named pipe or a local socket is actually created during
the first call to <span class="lang">serve()</span> for this object.</p>
<p><span class="def">bool npserver::serve(namedpipe& client, int timeout =
-1)</span> polls the pipe for connection requests. If there is a connection request
from a client, <span class="lang">serve()</span> opens and prepares the supplied
namedpipe object for communicating with the client, i.e. <span class="lang">client</span>
will be active upon return from <span class="lang">serve()</span>. The second
optional parameter <span class="lang">timeout</span> specifies the amount of time
in milliseconds to wait for a connection request. If timeout is 0 <span class="lang">serve()</span>
will return immediately; if it's -1 <span class="lang">serve()</span> will wait
infinitely. This function returns <span class="lang">true</span> if there is a
connection request and the <span class="lang">client</span> object is active,
or <span class="lang">false</span> if the call has timed out.</p>
<p class="seealso">See also: <a href="streams.namedpipe.html">namedpipe</a>, <a href="inet.examples.html">Networking
examples</a></p>
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