713 lines
20 KiB
C++
713 lines
20 KiB
C++
// Boost.Geometry
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//
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// varray details
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//
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// Copyright (c) 2011-2013 Andrew Hundt.
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// Copyright (c) 2012-2020 Adam Wulkiewicz, Lodz, Poland.
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//
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// This file was modified by Oracle on 2020.
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// Modifications copyright (c) 2020, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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//
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_DETAIL_HPP
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#define BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_DETAIL_HPP
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#include <algorithm>
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#include <cstddef>
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#include <cstring>
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#include <limits>
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#include <memory>
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#include <type_traits>
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#include <boost/config.hpp>
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#include <boost/core/no_exceptions_support.hpp>
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#include <boost/move/move.hpp>
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#include <boost/core/addressof.hpp>
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#include <boost/iterator/iterator_traits.hpp>
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#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
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#include <boost/move/detail/fwd_macros.hpp>
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#endif
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// TODO - move vectors iterators optimization to the other, optional file instead of checking defines?
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#if defined(BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_ENABLE_VECTOR_OPTIMIZATION) && !defined(BOOST_NO_EXCEPTIONS)
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#include <vector>
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#include <boost/container/vector.hpp>
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#endif // BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_ENABLE_VECTOR_OPTIMIZATION && !BOOST_NO_EXCEPTIONS
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namespace boost { namespace geometry { namespace index { namespace detail { namespace varray_detail
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{
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template <typename I>
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struct are_elements_contiguous : std::is_pointer<I>
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{};
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// EXPERIMENTAL - not finished
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// Conditional setup - mark vector iterators defined in known implementations
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// as iterators pointing to contiguous ranges
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#if defined(BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_ENABLE_VECTOR_OPTIMIZATION) && !defined(BOOST_NO_EXCEPTIONS)
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template <typename Pointer>
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struct are_elements_contiguous<
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boost::container::container_detail::vector_const_iterator<Pointer>
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> : std::true_type
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{};
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template <typename Pointer>
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struct are_elements_contiguous<
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boost::container::container_detail::vector_iterator<Pointer>
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> : std::true_type
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{};
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#if defined(BOOST_DINKUMWARE_STDLIB)
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template <typename T>
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struct are_elements_contiguous<
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std::_Vector_const_iterator<T>
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> : std::true_type
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{};
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template <typename T>
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struct are_elements_contiguous<
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std::_Vector_iterator<T>
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> : std::true_type
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{};
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#elif defined(BOOST_GNU_STDLIB)
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template <typename P, typename T, typename A>
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struct are_elements_contiguous<
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__gnu_cxx::__normal_iterator<P, std::vector<T, A> >
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> : std::true_type
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{};
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#elif defined(_LIBCPP_VERSION)
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// TODO - test it first
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//template <typename P>
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//struct are_elements_contiguous<
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// __wrap_iter<P>
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//> : std::true_type
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//{};
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#else // OTHER_STDLIB
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// TODO - add other iterators implementations
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#endif // STDLIB
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#endif // BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_ENABLE_VECTOR_OPTIMIZATION && !BOOST_NO_EXCEPTIONS
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template <typename I, typename O>
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struct is_memop_safe_for_range
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: std::integral_constant
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<
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bool,
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std::is_same
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<
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std::remove_const_t
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<
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typename ::boost::iterator_value<I>::type
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>,
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std::remove_const_t
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<
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typename ::boost::iterator_value<O>::type
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>
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>::value
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&&
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are_elements_contiguous<I>::value
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&&
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are_elements_contiguous<O>::value
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&&
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std::is_trivially_copyable
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<
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typename ::boost::iterator_value<O>::type
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>::value
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>
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{};
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template <typename I, typename V>
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struct is_memop_safe_for_value
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: std::integral_constant
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<
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bool,
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std::is_same
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<
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std::remove_const_t
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<
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typename ::boost::iterator_value<I>::type
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>,
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std::remove_const_t<V>
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>::value
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&&
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std::is_trivially_copyable
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<
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V
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>::value
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>
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{};
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// destroy(I, I)
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template <typename I>
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void destroy_dispatch(I /*first*/, I /*last*/,
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std::true_type /*has_trivial_destructor*/)
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{}
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template <typename I>
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void destroy_dispatch(I first, I last,
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std::false_type /*has_trivial_destructor*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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for ( ; first != last ; ++first )
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first->~value_type();
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}
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template <typename I>
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void destroy(I first, I last)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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destroy_dispatch(first, last, std::is_trivially_destructible<value_type>());
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}
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// destroy(I)
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template <typename I>
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void destroy_dispatch(I /*pos*/,
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std::true_type /*has_trivial_destructor*/)
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{}
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template <typename I>
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void destroy_dispatch(I pos,
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std::false_type /*has_trivial_destructor*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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pos->~value_type();
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}
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template <typename I>
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void destroy(I pos)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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destroy_dispatch(pos, std::is_trivially_destructible<value_type>());
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}
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// copy(I, I, O)
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template <typename I, typename O>
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inline O copy_dispatch(I first, I last, O dst,
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std::true_type /*use_memmove*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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typename boost::iterator_difference<I>::type d = std::distance(first, last);
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::memmove(boost::addressof(*dst), boost::addressof(*first), sizeof(value_type) * d);
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return dst + d;
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}
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template <typename I, typename O>
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inline O copy_dispatch(I first, I last, O dst,
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std::false_type /*use_memmove*/)
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{
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return std::copy(first, last, dst); // may throw
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}
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template <typename I, typename O>
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inline O copy(I first, I last, O dst)
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{
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return copy_dispatch(first, last, dst, is_memop_safe_for_range<I, O>()); // may throw
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}
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// uninitialized_copy(I, I, O)
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template <typename I, typename O>
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inline
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O uninitialized_copy_dispatch(I first, I last, O dst,
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std::true_type /*use_memcpy*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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typename boost::iterator_difference<I>::type d = std::distance(first, last);
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::memcpy(boost::addressof(*dst), boost::addressof(*first), sizeof(value_type) * d);
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return dst + d;
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}
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template <typename I, typename F>
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inline
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F uninitialized_copy_dispatch(I first, I last, F dst,
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std::false_type /*use_memcpy*/)
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{
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return std::uninitialized_copy(first, last, dst); // may throw
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}
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template <typename I, typename F>
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inline
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F uninitialized_copy(I first, I last, F dst)
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{
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return uninitialized_copy_dispatch(first, last, dst, is_memop_safe_for_range<I, F>()); // may throw
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}
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// uninitialized_move(I, I, O)
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template <typename I, typename O>
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inline
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O uninitialized_move_dispatch(I first, I last, O dst,
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std::true_type /*use_memcpy*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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typename boost::iterator_difference<I>::type d = std::distance(first, last);
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::memcpy(boost::addressof(*dst), boost::addressof(*first), sizeof(value_type) * d);
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return dst + d;
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}
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template <typename I, typename O>
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inline
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O uninitialized_move_dispatch(I first, I last, O dst,
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std::false_type /*use_memcpy*/)
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{
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//return boost::uninitialized_move(first, last, dst); // may throw
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O o = dst;
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BOOST_TRY
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{
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typedef typename std::iterator_traits<O>::value_type value_type;
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for (; first != last; ++first, ++o )
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new (boost::addressof(*o)) value_type(boost::move(*first));
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}
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BOOST_CATCH(...)
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{
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varray_detail::destroy(dst, o);
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BOOST_RETHROW;
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}
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BOOST_CATCH_END
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return dst;
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}
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template <typename I, typename O>
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inline
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O uninitialized_move(I first, I last, O dst)
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{
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return uninitialized_move_dispatch(first, last, dst, is_memop_safe_for_range<I, O>()); // may throw
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}
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// TODO - move uses memmove - implement 2nd version using memcpy?
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// move(I, I, O)
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template <typename I, typename O>
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inline
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O move_dispatch(I first, I last, O dst,
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std::true_type /*use_memmove*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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typename boost::iterator_difference<I>::type d = std::distance(first, last);
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::memmove(boost::addressof(*dst), boost::addressof(*first), sizeof(value_type) * d);
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return dst + d;
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}
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template <typename I, typename O>
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inline
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O move_dispatch(I first, I last, O dst,
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std::false_type /*use_memmove*/)
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{
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return boost::move(first, last, dst); // may throw
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}
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template <typename I, typename O>
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inline
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O move(I first, I last, O dst)
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{
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return move_dispatch(first, last, dst, is_memop_safe_for_range<I, O>()); // may throw
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}
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// move_backward(BDI, BDI, BDO)
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template <typename BDI, typename BDO>
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inline
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BDO move_backward_dispatch(BDI first, BDI last, BDO dst,
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std::true_type /*use_memmove*/)
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{
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typedef typename boost::iterator_value<BDI>::type value_type;
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typename boost::iterator_difference<BDI>::type d = std::distance(first, last);
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BDO foo(dst - d);
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::memmove(boost::addressof(*foo), boost::addressof(*first), sizeof(value_type) * d);
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return foo;
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}
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template <typename BDI, typename BDO>
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inline
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BDO move_backward_dispatch(BDI first, BDI last, BDO dst,
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std::false_type /*use_memmove*/)
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{
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return boost::move_backward(first, last, dst); // may throw
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}
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template <typename BDI, typename BDO>
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inline
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BDO move_backward(BDI first, BDI last, BDO dst)
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{
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return move_backward_dispatch(first, last, dst, is_memop_safe_for_range<BDI, BDO>()); // may throw
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}
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template <typename T>
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struct has_nothrow_move
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: std::integral_constant
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<
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bool,
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::boost::has_nothrow_move<std::remove_const_t<T> >::value
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||
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::boost::has_nothrow_move<T>::value
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>
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{};
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// uninitialized_move_if_noexcept(I, I, O)
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template <typename I, typename O>
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inline
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O uninitialized_move_if_noexcept_dispatch(I first, I last, O dst,
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std::true_type /*use_move*/)
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{
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return varray_detail::uninitialized_move(first, last, dst);
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}
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template <typename I, typename O>
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inline
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O uninitialized_move_if_noexcept_dispatch(I first, I last, O dst,
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std::false_type const& /*use_move*/)
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{
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return varray_detail::uninitialized_copy(first, last, dst);
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}
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template <typename I, typename O>
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inline
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O uninitialized_move_if_noexcept(I first, I last, O dst)
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{
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typedef has_nothrow_move<
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typename ::boost::iterator_value<O>::type
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> use_move;
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return uninitialized_move_if_noexcept_dispatch(first, last, dst, use_move()); // may throw
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}
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// move_if_noexcept(I, I, O)
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template <typename I, typename O>
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inline
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O move_if_noexcept_dispatch(I first, I last, O dst,
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std::true_type /*use_move*/)
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{
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return varray_detail::move(first, last, dst);
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}
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template <typename I, typename O>
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inline
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O move_if_noexcept_dispatch(I first, I last, O dst,
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std::false_type /*use_move*/)
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{
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return varray_detail::copy(first, last, dst);
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}
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template <typename I, typename O>
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inline
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O move_if_noexcept(I first, I last, O dst)
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{
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typedef has_nothrow_move<
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typename ::boost::iterator_value<O>::type
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> use_move;
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return move_if_noexcept_dispatch(first, last, dst, use_move()); // may throw
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}
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// uninitialized_fill(I, I)
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template <typename I>
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inline
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void uninitialized_fill_dispatch(I /*first*/, I /*last*/,
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std::true_type const& /*has_trivial_constructor*/,
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std::true_type const& /*disable_trivial_init*/)
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{}
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template <typename I>
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inline
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void uninitialized_fill_dispatch(I first, I last,
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std::true_type const& /*has_trivial_constructor*/,
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std::false_type const& /*disable_trivial_init*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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for ( ; first != last ; ++first )
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new (boost::addressof(*first)) value_type();
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}
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template <typename I, typename DisableTrivialInit>
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inline
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void uninitialized_fill_dispatch(I first, I last,
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std::false_type const& /*has_trivial_constructor*/,
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DisableTrivialInit const& /*not_used*/)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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I it = first;
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BOOST_TRY
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{
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for ( ; it != last ; ++it )
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new (boost::addressof(*it)) value_type(); // may throw
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}
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BOOST_CATCH(...)
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{
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varray_detail::destroy(first, it);
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BOOST_RETHROW;
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}
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BOOST_CATCH_END
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}
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template <typename I, typename DisableTrivialInit>
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inline
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void uninitialized_fill(I first, I last, DisableTrivialInit const& disable_trivial_init)
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{
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typedef typename boost::iterator_value<I>::type value_type;
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uninitialized_fill_dispatch(first, last, std::is_trivially_constructible<value_type>(), disable_trivial_init); // may throw
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}
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// construct(I)
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template <typename I>
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inline
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void construct_dispatch(std::true_type /*dont_init*/, I /*pos*/)
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{}
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template <typename I>
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inline
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void construct_dispatch(std::false_type /*dont_init*/, I pos)
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{
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typedef typename ::boost::iterator_value<I>::type value_type;
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new (static_cast<void*>(::boost::addressof(*pos))) value_type(); // may throw
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}
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template <typename DisableTrivialInit, typename I>
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inline
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void construct(DisableTrivialInit const&, I pos)
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{
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typedef typename ::boost::iterator_value<I>::type value_type;
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typedef std::integral_constant
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<
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bool,
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std::is_trivially_constructible<value_type>::value
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&&
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DisableTrivialInit::value
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> dont_init;
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construct_dispatch(dont_init(), pos); // may throw
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}
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// construct(I, V)
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template <typename I, typename V>
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inline
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void construct_copy_dispatch(I pos, V const& v,
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std::true_type /*use_memcpy*/)
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{
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::memcpy(boost::addressof(*pos), boost::addressof(v), sizeof(V));
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}
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template <typename I, typename P>
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inline
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void construct_copy_dispatch(I pos, P const& p,
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std::false_type const& /*use_memcpy*/)
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{
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typedef typename boost::iterator_value<I>::type V;
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new (static_cast<void*>(boost::addressof(*pos))) V(p); // may throw
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}
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template <typename DisableTrivialInit, typename I, typename P>
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inline
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void construct(DisableTrivialInit const&,
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I pos, P const& p)
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{
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construct_copy_dispatch(pos, p, is_memop_safe_for_value<I, P>()); // may throw
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}
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// Needed by push_back(V &&)
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template <typename I, typename V>
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inline
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void construct_move_dispatch(I pos, V const& v,
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|
std::true_type const& /*use_memcpy*/)
|
|
{
|
|
::memcpy(boost::addressof(*pos), boost::addressof(v), sizeof(V));
|
|
}
|
|
|
|
template <typename I, typename P>
|
|
inline
|
|
void construct_move_dispatch(I pos, BOOST_RV_REF(P) p,
|
|
std::false_type const& /*use_memcpy*/)
|
|
{
|
|
typedef typename boost::iterator_value<I>::type V;
|
|
new (static_cast<void*>(boost::addressof(*pos))) V(::boost::move(p)); // may throw
|
|
}
|
|
|
|
template <typename DisableTrivialInit, typename I, typename P>
|
|
inline
|
|
void construct(DisableTrivialInit const&, I pos, BOOST_RV_REF(P) p)
|
|
{
|
|
construct_move_dispatch(pos, ::boost::move(p), is_memop_safe_for_value<I, P>()); // may throw
|
|
}
|
|
|
|
// Needed by emplace_back() and emplace()
|
|
|
|
#if !defined(BOOST_CONTAINER_VARRAY_DISABLE_EMPLACE)
|
|
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)
|
|
|
|
template <typename DisableTrivialInit, typename I, class ...Args>
|
|
inline
|
|
void construct(DisableTrivialInit const&,
|
|
I pos,
|
|
BOOST_FWD_REF(Args) ...args)
|
|
{
|
|
typedef typename boost::iterator_value<I>::type V;
|
|
new (static_cast<void*>(boost::addressof(*pos))) V(::boost::forward<Args>(args)...); // may throw
|
|
}
|
|
|
|
#else // !BOOST_NO_CXX11_VARIADIC_TEMPLATES
|
|
|
|
// BOOST_NO_CXX11_RVALUE_REFERENCES -> P0 const& p0
|
|
// !BOOST_NO_CXX11_RVALUE_REFERENCES -> P0 && p0
|
|
// which means that version with one parameter may take V const& v
|
|
|
|
#define BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_DETAIL_CONSTRUCT(N) \
|
|
template <typename DisableTrivialInit, typename I, typename P BOOST_MOVE_I##N BOOST_MOVE_CLASS##N > \
|
|
inline \
|
|
void construct(DisableTrivialInit const&, \
|
|
I pos, \
|
|
BOOST_FWD_REF(P) p \
|
|
BOOST_MOVE_I##N BOOST_MOVE_UREF##N) \
|
|
{ \
|
|
typedef typename boost::iterator_value<I>::type V; \
|
|
new \
|
|
(static_cast<void*>(boost::addressof(*pos))) \
|
|
V(boost::forward<P>(p) BOOST_MOVE_I##N BOOST_MOVE_FWD##N); /*may throw*/ \
|
|
} \
|
|
|
|
BOOST_MOVE_ITERATE_1TO9(BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_DETAIL_CONSTRUCT)
|
|
#undef BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_DETAIL_CONSTRUCT
|
|
|
|
#endif // !BOOST_NO_CXX11_VARIADIC_TEMPLATES
|
|
#endif // !BOOST_CONTAINER_VARRAY_DISABLE_EMPLACE
|
|
|
|
// assign(I, V)
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign_copy_dispatch(I pos, V const& v,
|
|
std::true_type /*use_memcpy*/)
|
|
{
|
|
// TODO - use memmove here?
|
|
::memcpy(boost::addressof(*pos), boost::addressof(v), sizeof(V));
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign_copy_dispatch(I pos, V const& v,
|
|
std::false_type /*use_memcpy*/)
|
|
{
|
|
*pos = v; // may throw
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign(I pos, V const& v)
|
|
{
|
|
assign_copy_dispatch(pos, v, is_memop_safe_for_value<I, V>()); // may throw
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign_move_dispatch(I pos, V const& v,
|
|
std::true_type /*use_memcpy*/)
|
|
{
|
|
// TODO - use memmove here?
|
|
::memcpy(boost::addressof(*pos), boost::addressof(v), sizeof(V));
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign_move_dispatch(I pos, BOOST_RV_REF(V) v,
|
|
std::false_type /*use_memcpy*/)
|
|
{
|
|
*pos = boost::move(v); // may throw
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign(I pos, BOOST_RV_REF(V) v)
|
|
{
|
|
assign_move_dispatch(pos, ::boost::move(v), is_memop_safe_for_value<I, V>());
|
|
}
|
|
|
|
// uninitialized_copy_s
|
|
|
|
template <typename I, typename F>
|
|
inline std::size_t uninitialized_copy_s(I first, I last, F dest, std::size_t max_count)
|
|
{
|
|
std::size_t count = 0;
|
|
F it = dest;
|
|
|
|
BOOST_TRY
|
|
{
|
|
for ( ; first != last ; ++it, ++first, ++count )
|
|
{
|
|
if ( max_count <= count )
|
|
return (std::numeric_limits<std::size_t>::max)();
|
|
|
|
// dummy 0 as DisableTrivialInit
|
|
construct(0, it, *first); // may throw
|
|
}
|
|
}
|
|
BOOST_CATCH(...)
|
|
{
|
|
varray_detail::destroy(dest, it);
|
|
BOOST_RETHROW;
|
|
}
|
|
BOOST_CATCH_END
|
|
|
|
return count;
|
|
}
|
|
|
|
// scoped_destructor
|
|
|
|
template<class T>
|
|
class scoped_destructor
|
|
{
|
|
public:
|
|
scoped_destructor(T * ptr) : m_ptr(ptr) {}
|
|
|
|
~scoped_destructor()
|
|
{
|
|
if(m_ptr)
|
|
varray_detail::destroy(m_ptr);
|
|
}
|
|
|
|
void release() { m_ptr = 0; }
|
|
|
|
private:
|
|
T * m_ptr;
|
|
};
|
|
|
|
}}}}} // namespace boost::geometry::index::detail::varray_detail
|
|
|
|
#endif // BOOST_GEOMETRY_INDEX_DETAIL_VARRAY_DETAIL_HPP
|