69 lines
2.0 KiB
C++
69 lines
2.0 KiB
C++
/* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef BOUNDED_HEAP_BOOST_INCLUDED
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#define BOUNDED_HEAP_BOOST_INCLUDED
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#include "my_global.h"
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#include "my_base.h"
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/**
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@file
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A test of how to implement Bounded_queue using boost heap.
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We use the 'pimpl' idiom, to illustrate how to avoid dependencies from
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our own header files to boost header files.
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*/
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template<typename Element_type,
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typename Key_type,
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typename Key_generator,
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typename Key_compare
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>
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class Bounded_queue_impl;
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template<typename Element_type,
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typename Key_type,
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typename Key_generator,
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typename Key_compare = std::less<Key_type>
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>
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class Bounded_queue_boost
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{
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public:
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explicit Bounded_queue_boost();
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~Bounded_queue_boost();
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int init(ha_rows max_elements,
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Key_generator *sort_param,
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Key_type *sort_keys);
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void push(Element_type element);
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size_t num_elements() const { return m_num_elements; }
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private:
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Key_compare m_cmp;
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Key_type *m_sort_keys;
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size_t m_compare_length;
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Key_generator *m_sort_param;
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size_t m_max_elements;
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size_t m_num_elements;
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Bounded_queue_impl<Element_type, Key_type, Key_generator, Key_compare> *pimpl;
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};
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#endif // BOUNDED_HEAP_BOOST_INCLUDED
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