forked from boostorg/container
f2947c115e
- Added Extended Allocator support for Boost.Container. - Improved Doxygen generated reference - Fixed ticket #9338 ("VS2005 compiler errors in swap() definition after including container/memory_util.hpp")
706 lines
20 KiB
C++
706 lines
20 KiB
C++
// Boost.Container
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//
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// varray details
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//
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// Copyright (c) 2012-2013 Adam Wulkiewicz, Lodz, Poland.
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// Copyright (c) 2011-2013 Andrew Hundt.
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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_CONTAINER_DETAIL_VARRAY_UTIL_HPP
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#define BOOST_CONTAINER_DETAIL_VARRAY_UTIL_HPP
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#include <cstddef>
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#include <cstring>
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#include <memory>
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#include <limits>
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#include <boost/mpl/if.hpp>
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#include <boost/mpl/and.hpp>
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#include <boost/mpl/or.hpp>
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#include <boost/mpl/int.hpp>
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#include <boost/type_traits/is_same.hpp>
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#include <boost/type_traits/remove_const.hpp>
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#include <boost/type_traits/remove_reference.hpp>
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#include <boost/type_traits/has_trivial_assign.hpp>
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#include <boost/type_traits/has_trivial_copy.hpp>
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#include <boost/type_traits/has_trivial_constructor.hpp>
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#include <boost/type_traits/has_trivial_destructor.hpp>
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//#include <boost/type_traits/has_nothrow_constructor.hpp>
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//#include <boost/type_traits/has_nothrow_copy.hpp>
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//#include <boost/type_traits/has_nothrow_assign.hpp>
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//#include <boost/type_traits/has_nothrow_destructor.hpp>
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#include <boost/detail/no_exceptions_support.hpp>
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#include <boost/config.hpp>
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#include <boost/move/move.hpp>
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#include <boost/utility/addressof.hpp>
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#include <boost/iterator/iterator_traits.hpp>
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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_CONTAINER_VARRAY_ENABLE_VECTORS_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_CONTAINER_VARRAY_ENABLE_ITERATORS_OPTIMIZATION && !BOOST_NO_EXCEPTIONS
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namespace boost { namespace container { namespace varray_detail {
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template <typename I>
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struct are_elements_contiguous : boost::is_pointer<I>
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{};
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#if defined(BOOST_CONTAINER_VARRAY_ENABLE_VECTORS_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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> : boost::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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> : boost::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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> : boost::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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> : boost::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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> : boost::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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//> : boost::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_CONTAINER_VARRAY_ENABLE_VECTORS_OPTIMIZATION && !BOOST_NO_EXCEPTIONS
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}}} // namespace boost::container::varray_detail
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namespace boost { namespace container { namespace varray_detail {
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template <typename I, typename O>
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struct are_corresponding :
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::boost::mpl::and_<
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::boost::is_same<
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::boost::remove_const<
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typename ::boost::iterator_value<I>::type
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>,
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::boost::remove_const<
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typename ::boost::iterator_value<O>::type
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>
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>,
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are_elements_contiguous<I>,
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are_elements_contiguous<O>
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>
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{};
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template <typename I, typename V>
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struct is_corresponding_value :
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::boost::is_same<
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::boost::remove_const<
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typename ::boost::iterator_value<I>::type
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>,
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::boost::remove_const<V>
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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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boost::true_type const& /*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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boost::false_type const& /*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, has_trivial_destructor<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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boost::true_type const& /*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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boost::false_type const& /*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, has_trivial_destructor<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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boost::mpl::bool_<true> const& /*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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boost::mpl::bool_<false> const& /*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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typedef typename
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::boost::mpl::and_<
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are_corresponding<I, O>,
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::boost::has_trivial_assign<
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typename ::boost::iterator_value<O>::type
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>
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>::type
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use_memmove;
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return copy_dispatch(first, last, dst, use_memmove()); // 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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boost::mpl::bool_<true> const& /*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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boost::mpl::bool_<false> const& /*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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typedef typename
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::boost::mpl::and_<
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are_corresponding<I, F>,
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::boost::has_trivial_copy<
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typename ::boost::iterator_value<F>::type
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>
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>::type
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use_memcpy;
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return uninitialized_copy_dispatch(first, last, dst, use_memcpy()); // 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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boost::mpl::bool_<true> const& /*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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boost::mpl::bool_<false> const& /*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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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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typedef typename
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::boost::mpl::and_<
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are_corresponding<I, O>,
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::boost::has_trivial_copy<
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typename ::boost::iterator_value<O>::type
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>
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>::type
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use_memcpy;
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return uninitialized_move_dispatch(first, last, dst, use_memcpy()); // 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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boost::mpl::bool_<true> const& /*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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boost::mpl::bool_<false> const& /*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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typedef typename
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::boost::mpl::and_<
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are_corresponding<I, O>,
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::boost::has_trivial_assign<
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typename ::boost::iterator_value<O>::type
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>
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>::type
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use_memmove;
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return move_dispatch(first, last, dst, use_memmove()); // 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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boost::mpl::bool_<true> const& /*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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boost::mpl::bool_<false> const& /*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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typedef typename
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::boost::mpl::and_<
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are_corresponding<BDI, BDO>,
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::boost::has_trivial_assign<
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typename ::boost::iterator_value<BDO>::type
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>
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>::type
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use_memmove;
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return move_backward_dispatch(first, last, dst, use_memmove()); // may throw
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}
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template <typename T>
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struct has_nothrow_move : public
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::boost::mpl::or_<
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boost::mpl::bool_<
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::boost::has_nothrow_move<
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typename ::boost::remove_const<T>::type
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>::value
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>,
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boost::mpl::bool_<
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::boost::has_nothrow_move<T>::value
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>
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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, boost::mpl::bool_<true> const& /*use_move*/)
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{ return uninitialized_move(first, last, dst); }
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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, boost::mpl::bool_<false> const& /*use_move*/)
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{ return uninitialized_copy(first, last, dst); }
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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 typename has_nothrow_move<
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typename ::boost::iterator_value<O>::type
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>::type 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, boost::mpl::bool_<true> const& /*use_move*/)
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{ return move(first, last, dst); }
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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, boost::mpl::bool_<false> const& /*use_move*/)
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{ return copy(first, last, dst); }
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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 typename has_nothrow_move<
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typename ::boost::iterator_value<O>::type
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>::type 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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boost::true_type const& /*has_trivial_constructor*/,
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boost::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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boost::true_type const& /*has_trivial_constructor*/,
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boost::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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boost::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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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, boost::has_trivial_constructor<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(boost::mpl::bool_<true> const& /*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(boost::mpl::bool_<false> const& /*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 typename ::boost::mpl::and_<
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boost::has_trivial_constructor<value_type>,
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DisableTrivialInit
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>::type 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_dispatch(I pos, V const& v,
|
|
boost::mpl::bool_<true> const& /*use_memcpy*/)
|
|
{
|
|
::memcpy(boost::addressof(*pos), boost::addressof(v), sizeof(V));
|
|
}
|
|
|
|
template <typename I, typename P>
|
|
inline
|
|
void construct_dispatch(I pos, P const& p,
|
|
boost::mpl::bool_<false> const& /*use_memcpy*/)
|
|
{
|
|
typedef typename boost::iterator_value<I>::type V;
|
|
new (static_cast<void*>(boost::addressof(*pos))) V(p); // may throw
|
|
}
|
|
|
|
template <typename DisableTrivialInit, typename I, typename P>
|
|
inline
|
|
void construct(DisableTrivialInit const&,
|
|
I pos, P const& p)
|
|
{
|
|
typedef typename
|
|
::boost::mpl::and_<
|
|
is_corresponding_value<I, P>,
|
|
::boost::has_trivial_copy<P>
|
|
>::type
|
|
use_memcpy;
|
|
|
|
construct_dispatch(pos, p, use_memcpy()); // may throw
|
|
}
|
|
|
|
// Needed by push_back(V &&)
|
|
|
|
template <typename DisableTrivialInit, typename I, typename P>
|
|
inline
|
|
void construct(DisableTrivialInit const&, I pos, BOOST_RV_REF(P) p)
|
|
{
|
|
typedef typename boost::iterator_value<I>::type V;
|
|
new (static_cast<void*>(boost::addressof(*pos))) V(::boost::move(p)); // may throw
|
|
}
|
|
|
|
// Needed by emplace_back() and emplace()
|
|
|
|
#if !defined(BOOST_CONTAINER_VARRAY_DISABLE_EMPLACE)
|
|
#if !defined(BOOST_NO_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_VARIADIC_TEMPLATES
|
|
|
|
// BOOST_NO_RVALUE_REFERENCES -> P0 const& p0
|
|
// !BOOST_NO_RVALUE_REFERENCES -> P0 && p0
|
|
// which means that version with one parameter may take V const& v
|
|
|
|
#define BOOST_PP_LOCAL_MACRO(n) \
|
|
template <typename DisableTrivialInit, typename I, typename P BOOST_PP_ENUM_TRAILING_PARAMS(n, typename P) > \
|
|
inline \
|
|
void construct(DisableTrivialInit const&, \
|
|
I pos, \
|
|
BOOST_CONTAINER_PP_PARAM(P, p) \
|
|
BOOST_PP_ENUM_TRAILING(n, BOOST_CONTAINER_PP_PARAM_LIST, _)) \
|
|
{ \
|
|
typedef typename boost::iterator_value<I>::type V; \
|
|
new \
|
|
(static_cast<void*>(boost::addressof(*pos))) \
|
|
V(p, BOOST_PP_ENUM(n, BOOST_CONTAINER_PP_PARAM_FORWARD, _)); /*may throw*/ \
|
|
} \
|
|
//
|
|
#define BOOST_PP_LOCAL_LIMITS (1, BOOST_CONTAINER_MAX_CONSTRUCTOR_PARAMETERS)
|
|
#include BOOST_PP_LOCAL_ITERATE()
|
|
|
|
#endif // !BOOST_NO_VARIADIC_TEMPLATES
|
|
#endif // !BOOST_CONTAINER_VARRAY_DISABLE_EMPLACE
|
|
|
|
// assign(I, V)
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign_dispatch(I pos, V const& v,
|
|
boost::mpl::bool_<true> const& /*use_memcpy*/)
|
|
{
|
|
::memcpy(boost::addressof(*pos), boost::addressof(v), sizeof(V));
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign_dispatch(I pos, V const& v,
|
|
boost::mpl::bool_<false> const& /*use_memcpy*/)
|
|
{
|
|
*pos = v; // may throw
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign(I pos, V const& v)
|
|
{
|
|
typedef typename
|
|
::boost::mpl::and_<
|
|
is_corresponding_value<I, V>,
|
|
::boost::has_trivial_assign<V>
|
|
>::type
|
|
use_memcpy;
|
|
|
|
assign_dispatch(pos, v, use_memcpy()); // may throw
|
|
}
|
|
|
|
template <typename I, typename V>
|
|
inline
|
|
void assign(I pos, BOOST_RV_REF(V) v)
|
|
{
|
|
*pos = boost::move(v); // may throw
|
|
}
|
|
|
|
|
|
// 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(...)
|
|
{
|
|
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)
|
|
destroy(m_ptr);
|
|
}
|
|
|
|
void release() { m_ptr = 0; }
|
|
|
|
private:
|
|
T * m_ptr;
|
|
};
|
|
|
|
}}} // namespace boost::container::varray_detail
|
|
|
|
#endif // BOOST_CONTAINER_DETAIL_VARRAY_UTIL_HPP
|