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66 lines
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66 lines
2.3 KiB
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<title>Logtalk predicate directive: atomic/1</title>
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<div class="top-left">Logtalk reference manual</div>
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<div class="top-right">Predicate directive: atomic/1</div>
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<div class="bottom-right"><span class="page"/></div>
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<div class="navtop"><a href="../../index.html">contents</a> > <a href="../index.html">reference manual</a> > <a href="../index.html#directives">directives</a></div>
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<h2 class="codenp">atomic/1<span id="directives_atomic1"/></h2>
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<h4>Description</h4>
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<pre>atomic(Functor/Arity)
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atomic(Functor1/Arity1, Functor2/Arity2, ...)
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atomic([Functor1/Arity1, Functor2/Arity2, ...])
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atomic(Functor//Arity)
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atomic(Functor1//Arity1, Functor2//Arity2, ...)
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atomic([Functor1//Arity1, Functor2//Arity2, ...])</pre>
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<p>
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Declares atomic predicates and atomic grammar rule non-terminals. The execution of an atomic predicate (or atomic non-terminal) is protected by a mutex in order to allow for thread synchronization when proving a call to the predicate (or non-terminal).
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</p>
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<h4>Template and modes</h4>
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<pre>atomic(+predicate_indicator_term)
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atomic(+non_terminal_indicator_term)</pre>
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<h4>Examples</h4>
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<pre>:- atomic(db_update/1).
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:- atomic(write_stream/2, write_stream/2).
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:- atomic([add_to_queue/2, remove_from_queue/2]).</pre>
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<span>Copyright © <a href="mailto:pmoura@logtalk.org">Paulo Moura</a> — <a href="http://logtalk.org">Logtalk.org</a></span><br/>
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<span>Last updated on: October 26, 2006</span>
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