45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
//
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// Pool of shared objects
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//
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// Copyright (C) 2015-2022 Andreas Gustafsson. This file is part of
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// the Gaborator library source distribution. See the file LICENSE at
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// the top level of the distribution for license information.
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//
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#ifndef _GABORATOR_POOL_H
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#define _GABORATOR_POOL_H
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#include <map>
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namespace gaborator {
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// The "pool" class is for sharing FFT objects so that we don't
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// create multiple FFTs of the same size. It could also be used
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// to share objects of some other class T where we wish to avoid
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// creating multiple Ts with the same K.
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template <class T, class K>
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struct pool {
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typedef std::map<K, T *> m_t;
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~pool() {
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for (typename m_t::iterator it = m.begin(); it != m.end(); it++) {
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delete (*it).second;
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}
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}
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T *get(const K &k) {
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std::pair<typename m_t::iterator, bool> r =
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m.insert(std::make_pair(k, (T *)0));
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if (r.second) {
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// New element was inserted
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assert((*(r.first)).second == 0);
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(*r.first).second = new T(k);
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}
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return (*r.first).second;
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}
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m_t m;
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};
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} // namespace
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#endif
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