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![]() | Pack logtalk -- logtalk-3.81.0/manuals/_sources/refman/predicates/threaded_engine_self_1.rst.txt |
.. This file is part of Logtalk https://logtalk.org/ SPDX-FileCopyrightText: 1998-2024 Paulo Moura <pmoura@logtalk.org> SPDX-License-Identifier: Apache-2.0
Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
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.. rst-class:: align-right
built-in predicate
.. index:: pair: threaded_engine_self/1; Built-in predicate .. _predicates_threaded_engine_self_1:
::
threaded_engine_self(Engine)
Queries the name of engine calling the predicate. Fails if not called from within an engine or if the argument doesn't unify with the engine name.
.. note::
This predicate requires a :term:`backend Prolog compiler` providing
compatible multi-threading primitives. The value of the read-only
:ref:`engines <flag_engines>` flag is set to supported
when that
is the case.
::
threaded_engine_self(?nonvar) - zero_or_one
(none)
::
% find the name of the engine making the query:
..., threaded_engine_self(Engine)
, ...
% check if the the engine making the query is worker_1:
..., threaded_engine_self(worker_1)
, ...
.. seealso::
:ref:predicates_threaded_engine_create_3
,
:ref:predicates_threaded_engine_destroy_1
,
:ref:predicates_threaded_engine_1