note description: "[ Multi-threaded implementation of {MULTI_THREADER_I}, using a mutex to synchorize access to resources of an object. ]" legal: "See notice at end of class." status: "See notice at end of class."; date: "$Date$"; revision: "$Revision$" class MULTI_THREADER_IMP inherit MULTI_THREADER_I create make feature {NONE} -- Initialization make -- Initializes the multi-threader do create mutex.make end feature {NONE} -- Access mutex: MUTEX -- A multi-thread access mutex. feature {NONE} -- Basic operations perform (a_action: PROCEDURE) -- local l_locked: BOOLEAN do l_locked := True mutex.lock a_action.call (Void) l_locked := False mutex.unlock rescue if l_locked then check is_thread_capable: {PLATFORM}.is_thread_capable end l_locked := False mutex.unlock end end retrieve (a_action: FUNCTION [detachable ANY]): detachable ANY -- local l_locked: BOOLEAN do l_locked := True mutex.lock Result := a_action.item (Void) l_locked := False mutex.unlock rescue if l_locked then check is_thread_capable: {PLATFORM}.is_thread_capable end l_locked := False mutex.unlock end end test (a_action: PREDICATE; a_expected: BOOLEAN): BOOLEAN -- local l_locked: BOOLEAN do l_locked := True mutex.lock Result := (a_action.item (Void) = a_expected) l_locked := False mutex.unlock rescue if l_locked then check is_thread_capable: {PLATFORM}.is_thread_capable end l_locked := False mutex.unlock end end invariant mutex_attached: mutex /= Void mutex_is_set: mutex.is_set ;note copyright: "Copyright (c) 1984-2009, Eiffel Software" license: "GPL version 2 (see http://www.eiffel.com/licensing/gpl.txt)" licensing_options: "http://www.eiffel.com/licensing" copying: "[ This file is part of Eiffel Software's Eiffel Development Environment. Eiffel Software's Eiffel Development Environment is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2 of the License (available at the URL listed under "license" above). Eiffel Software's Eiffel Development Environment is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Eiffel Software's Eiffel Development Environment; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA ]" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end