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<h1>Module <a href="type_Lwt_util.html">Lwt_util</a></h1>
<pre><span class="keyword">module</span> Lwt_util: <code class="code"><span class="keyword">sig</span></code> <a href="Lwt_util.html">..</a> <code class="code"><span class="keyword">end</span></code></pre><div class="info">
Note: This lodule is deprecated. Use <a href="Lwt_list.html"><code class="code"><span class="constructor">Lwt_list</span></code></a> and <a href="Lwt_pool.html"><code class="code"><span class="constructor">Lwt_pool</span></code></a>
instead.<br>
</div>
<hr width="100%">
<br>
<h2 id="2_Listsiterators">Lists iterators</h2><br>
<pre><span id="VALiter"><span class="keyword">val</span> iter</span> : <code class="type">('a -> unit <a href="Lwt.html#TYPEt">Lwt.t</a>) -> 'a list -> unit <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
<code class="code">iter f l</code> start a thread for each element in <code class="code">l</code>. The threads
are started according to the list order, but then can run
concurrently. It terminates when all the threads are
terminated, if all threads are successful. It fails if any of
the threads fail.<br>
</div>
<pre><span id="VALiter_serial"><span class="keyword">val</span> iter_serial</span> : <code class="type">('a -> unit <a href="Lwt.html#TYPEt">Lwt.t</a>) -> 'a list -> unit <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
Similar to <code class="code">iter</code> but wait for one thread to terminate before
starting the next one.<br>
</div>
<pre><span id="VALmap"><span class="keyword">val</span> map</span> : <code class="type">('a -> 'b <a href="Lwt.html#TYPEt">Lwt.t</a>) -> 'a list -> 'b list <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
<code class="code">map f l</code> apply <code class="code">f</code> to each element in <code class="code">l</code> and collect the
results of the threads thus created. The threads are started
according to the list order, but then can run concurrently.
<code class="code">map f l</code> fails if any of the threads fail.<br>
</div>
<pre><span id="VALmap_with_waiting_action"><span class="keyword">val</span> map_with_waiting_action</span> : <code class="type">('a -> 'b <a href="Lwt.html#TYPEt">Lwt.t</a>) -> ('a -> unit) -> 'a list -> 'b list <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
<code class="code">map_with_waiting_action f wa l</code> apply <code class="code">f</code> to each element
in <code class="code">l</code> and collect the results of the threads thus created.
The threads are started according to the list order, but
then can run concurrently. The difference with <code class="code">map f l</code> is
that function wa will be called on the element that the
function is waiting for its termination.<br>
</div>
<pre><span id="VALmap_serial"><span class="keyword">val</span> map_serial</span> : <code class="type">('a -> 'b <a href="Lwt.html#TYPEt">Lwt.t</a>) -> 'a list -> 'b list <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
Similar to <code class="code">map</code> but wait for one thread to terminate before
starting the next one.<br>
</div>
<pre><span id="VALfold_left"><span class="keyword">val</span> fold_left</span> : <code class="type">('a -> 'b -> 'a <a href="Lwt.html#TYPEt">Lwt.t</a>) -> 'a -> 'b list -> 'a <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
Similar to <code class="code"><span class="constructor">List</span>.fold_left</code>.<br>
</div>
<br>
<h2 id="2_Regions">Regions</h2><br>
<pre><span id="TYPEregion"><span class="keyword">type</span> <code class="type"></code>region</span> </pre>
<pre><span id="VALmake_region"><span class="keyword">val</span> make_region</span> : <code class="type">int -> <a href="Lwt_util.html#TYPEregion">region</a></code></pre><div class="info">
<code class="code">make_region sz</code> create a region of size <code class="code">sz</code>.<br>
</div>
<pre><span id="VALresize_region"><span class="keyword">val</span> resize_region</span> : <code class="type"><a href="Lwt_util.html#TYPEregion">region</a> -> int -> unit</code></pre><div class="info">
<code class="code">resize_region reg sz</code> resize the region <code class="code">reg</code> to size <code class="code">sz</code>.<br>
</div>
<pre><span id="VALrun_in_region"><span class="keyword">val</span> run_in_region</span> : <code class="type"><a href="Lwt_util.html#TYPEregion">region</a> -> int -> (unit -> 'a <a href="Lwt.html#TYPEt">Lwt.t</a>) -> 'a <a href="Lwt.html#TYPEt">Lwt.t</a></code></pre><div class="info">
<code class="code">run_in_region reg size f</code> execute the thread produced by the
function <code class="code">f</code> in the region <code class="code">reg</code>. The thread is not started
before some room is available in the region.<br>
</div>
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