84 lines
3.2 KiB
C++
84 lines
3.2 KiB
C++
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#ifndef OSMIUM_DETAIL_MMAP_VECTOR_FILE_HPP
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#define OSMIUM_DETAIL_MMAP_VECTOR_FILE_HPP
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/*
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This file is part of Osmium (http://osmcode.org/libosmium).
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Copyright 2013,2014 Jochen Topf <jochen@topf.org> and others (see README).
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Boost Software License - Version 1.0 - August 17th, 2003
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#include <cstddef>
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#include <osmium/index/detail/typed_mmap.hpp>
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#include <osmium/index/detail/mmap_vector_base.hpp>
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#include <osmium/index/detail/tmpfile.hpp>
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namespace osmium {
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namespace detail {
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/**
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* This class looks and behaves like STL vector, but mmap's a file internally.
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*/
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template <typename T>
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class mmap_vector_file : public mmap_vector_base<T, mmap_vector_file> {
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public:
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explicit mmap_vector_file() :
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mmap_vector_base<T, osmium::detail::mmap_vector_file>(
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osmium::detail::create_tmp_file(),
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osmium::detail::mmap_vector_size_increment,
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0) {
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}
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explicit mmap_vector_file(int fd) :
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mmap_vector_base<T, osmium::detail::mmap_vector_file>(
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fd,
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osmium::detail::typed_mmap<T>::file_size(fd) == 0 ? osmium::detail::mmap_vector_size_increment : osmium::detail::typed_mmap<T>::file_size(fd),
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osmium::detail::typed_mmap<T>::file_size(fd)) {
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}
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void reserve(size_t new_capacity) {
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if (new_capacity > this->capacity()) {
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osmium::detail::typed_mmap<T>::unmap(this->data(), this->capacity());
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osmium::detail::typed_mmap<T>::grow_file(new_capacity, this->m_fd);
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osmium::detail::typed_mmap<T>::map(new_capacity, this->m_fd);
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this->m_capacity = new_capacity;
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}
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}
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}; // class mmap_vector_file
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} // namespace detail
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} // namespace osmium
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#endif // OSMIUM_DETAIL_MMAP_VECTOR_FILE_HPP
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