fast_vector.hpp

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// fast_vector.hpp
/*
 *  Copyright (c) 2019 Leigh Johnston.
 *
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions are
 *  met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 *     * Neither the name of Leigh Johnston nor the names of any
 *       other contributors to this software may be used to endorse or
 *       promote products derived from this software without specific prior
 *       written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 *  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 *  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 *  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 *  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 *  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 *  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
 
#pragma once
 
#include <neolib/neolib.hpp>
#include <vector>
#include <neolib/core/allocator.hpp>
 
namespace neolib
{
    template <typename T, std::size_t SmallBufferSize>
    class fast_vector : private small_buffer_allocator<T, SmallBufferSize>::small_buffer, public std::vector<T, small_buffer_allocator<T, SmallBufferSize>>
    {
    public:
        typedef small_buffer_allocator<T, SmallBufferSize> allocator_type;
    private:
        typedef typename small_buffer_allocator<T, SmallBufferSize>::small_buffer small_buffer_type;
        typedef std::vector<T, small_buffer_allocator<T, SmallBufferSize>> std_type;
    public:
        fast_vector() :
            std_type{ allocator_type{ *this } }
        {
            std_type::reserve(SmallBufferSize);
        }
    public:
        bool using_small_buffer() const
        {
            return small_buffer_type::allocated;
        }
    };
}