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<div class="top-left">Logtalk reference manual</div> 
<div class="top-right">Built-in predicate: threaded_exit/1</div>
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<h2 id="builtins_threaded_exit1" class="codenp">threaded_exit/1</h2>

<h4>Description</h4>

<pre>threaded_exit(Goal)</pre>
<p>
Retrieve the result of proving <code>Goal</code> in a new thread. This predicate blocks execution until the reply is sent to the <em>this</em> message queue by the thread executing the goal. When there is no thread proving the goal, the predicate generates an exception. This predicate is non-deterministic, providing access to any alternative solutions of its argument.
</p>

<h4>Template and modes</h4>

<pre>threaded_exit(+callable)</pre>

<h4>Errors</h4>

<dl>
	<dt>Goal is a variable:</dt>
		<dd><code>instantiation_error</code></dd>
	<dt>Goal is neither a variable nor a callable term:</dt>
		<dd><code>type_error(callable, Goal)</code></dd>
	<dt>no thread is running for proving Goal:</dt>
		<dd><code>existence_error(goal_thread, Goal)</code></dd>
</dl>

<h4>Examples</h4>

<dl>
	<dt>To retrieve an asynchronous goal proof result:</dt>
		<dd><code>threaded_exit(Goal)</code></dd>
	<dt>To retrieve an asynchronous message to <em>self</em> result:</dt>
		<dd><code>threaded_exit(::Goal)</code></dd>
	<dt>To retrieve an asynchronous message result:</dt>
		<dd><code>threaded_exit(Object::Goal)</code></dd>
</dl>

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		<span>Last updated on: May 29, 2007</span>
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