66 lines
2 KiB
C++
66 lines
2 KiB
C++
/*
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* Copyright (c) 2011 Juli Mallett. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef COMMON_REGISTRAR_H
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#define COMMON_REGISTRAR_H
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#include <set>
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/*
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* U is merely a type used as a unique key, so that multiple Registrars of
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* objects with the same type can coexist.
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*/
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template<typename U, typename T>
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class Registrar {
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std::set<T> registered_set_;
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Registrar(void)
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: registered_set_()
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{ }
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~Registrar()
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{ }
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public:
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void enter(T item)
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{
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registered_set_.insert(item);
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}
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std::set<T> enumerate(void) const
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{
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return (registered_set_);
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}
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static Registrar *instance(void)
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{
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static Registrar *instance;
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if (instance == NULL)
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instance = new Registrar();
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return (instance);
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}
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};
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#endif /* !COMMON_REGISTRAR_H */
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