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<h1>Module <a href="type_Lwt_lib.html">Lwt_lib</a></h1>
<pre><span class="keyword">module</span> Lwt_lib: <code class="code"><span class="keyword">sig</span></code> <a href="Lwt_lib.html">..</a> <code class="code"><span class="keyword">end</span></code></pre><div class="info">
Cooperative unix system calls<br>
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<hr width="100%">
<br>
This module transform non-cooperative functions of the standard
library into cooperative ones by launching them into system
threads.
<p>
Indeed, lots of functions of the <code class="code"><span class="constructor">Unix</span></code> modules, corresponding to
functions of the standard C library may take times to
complete. For example <code class="code">gethostbyname</code> may use DNS resolution,
users informations may be stored in a ldap database, ...
<p>
Since these functions are implemented (in the standard C library)
using blocking IOs, if you use them directly, you program may
hang.<br>
<pre><span id="VALgetaddrinfo"><span class="keyword">val</span> getaddrinfo</span> : <code class="type">string -> string -> Unix.getaddrinfo_option list -> Unix.addr_info list <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
Cooperative getaddrinfo with cache (using Lwt_preemptive.detach)<br>
</div>
<pre><span id="VALgethostbyname"><span class="keyword">val</span> gethostbyname</span> : <code class="type">string -> Unix.host_entry <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
Cooperative gethostbyname with cache (using Lwt_preemptive.detach)<br>
</div>
<pre><span id="VALgetnameinfo"><span class="keyword">val</span> getnameinfo</span> : <code class="type">Unix.sockaddr -> Unix.getnameinfo_option list -> Unix.name_info <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
Cooperative getnameinfo with cache (using Lwt_preemptive.detach)<br>
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