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Diffstat (limited to 'boost/container/detail/destroyers.hpp')
-rw-r--r-- | boost/container/detail/destroyers.hpp | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/boost/container/detail/destroyers.hpp b/boost/container/detail/destroyers.hpp new file mode 100644 index 0000000000..26ae089aa6 --- /dev/null +++ b/boost/container/detail/destroyers.hpp @@ -0,0 +1,163 @@ +////////////////////////////////////////////////////////////////////////////// +// +// (C) Copyright Ion Gaztanaga 2005-2011. +// +// Distributed under the Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// +// See http://www.boost.org/libs/container for documentation. +// +////////////////////////////////////////////////////////////////////////////// + +#ifndef BOOST_CONTAINER_DESTROYERS_HPP +#define BOOST_CONTAINER_DESTROYERS_HPP + +#if (defined _MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif + +#include "config_begin.hpp" +#include <boost/container/detail/workaround.hpp> +#include <boost/container/detail/version_type.hpp> +#include <boost/container/detail/utilities.hpp> +#include <boost/container/allocator/allocator_traits.hpp> + +namespace boost { +namespace container { +namespace container_detail { + +//!A deleter for scoped_ptr that deallocates the memory +//!allocated for an array of objects using a STL allocator. +template <class Allocator> +struct scoped_array_deallocator +{ + typedef boost::container::allocator_traits<Allocator> AllocTraits; + typedef typename AllocTraits::pointer pointer; + typedef typename AllocTraits::size_type size_type; + + scoped_array_deallocator(pointer p, Allocator& a, size_type length) + : m_ptr(p), m_alloc(a), m_length(length) {} + + ~scoped_array_deallocator() + { if (m_ptr) m_alloc.deallocate(m_ptr, m_length); } + + void release() + { m_ptr = 0; } + + private: + pointer m_ptr; + Allocator& m_alloc; + size_type m_length; +}; + +template <class Allocator> +struct null_scoped_array_deallocator +{ + typedef boost::container::allocator_traits<Allocator> AllocTraits; + typedef typename AllocTraits::pointer pointer; + typedef typename AllocTraits::size_type size_type; + + null_scoped_array_deallocator(pointer, Allocator&, size_type) + {} + + void release() + {} +}; + + +//!A deleter for scoped_ptr that destroys +//!an object using a STL allocator. +template <class Allocator> +struct scoped_destructor_n +{ + typedef boost::container::allocator_traits<Allocator> AllocTraits; + typedef typename AllocTraits::pointer pointer; + typedef typename AllocTraits::value_type value_type; + typedef typename AllocTraits::size_type size_type; + + scoped_destructor_n(pointer p, Allocator& a, size_type n) + : m_p(p), m_a(a), m_n(n) + {} + + void release() + { m_p = 0; } + + void increment_size(size_type inc) + { m_n += inc; } + + ~scoped_destructor_n() + { + if(!m_p) return; + value_type *raw_ptr = container_detail::to_raw_pointer(m_p); + for(size_type i = 0; i < m_n; ++i, ++raw_ptr) + AllocTraits::destroy(m_a, raw_ptr); + } + + private: + pointer m_p; + Allocator & m_a; + size_type m_n; +}; + +//!A deleter for scoped_ptr that destroys +//!an object using a STL allocator. +template <class Allocator> +struct null_scoped_destructor_n +{ + typedef boost::container::allocator_traits<Allocator> AllocTraits; + typedef typename AllocTraits::pointer pointer; + typedef typename AllocTraits::size_type size_type; + + null_scoped_destructor_n(pointer, Allocator&, size_type) + {} + + void increment_size(size_type) + {} + + void release() + {} +}; + +template <class Allocator> +class allocator_destroyer +{ + typedef boost::container::allocator_traits<Allocator> AllocTraits; + typedef typename AllocTraits::value_type value_type; + typedef typename AllocTraits::pointer pointer; + typedef container_detail::integral_constant<unsigned, + boost::container::container_detail:: + version<Allocator>::value> alloc_version; + typedef container_detail::integral_constant<unsigned, 1> allocator_v1; + typedef container_detail::integral_constant<unsigned, 2> allocator_v2; + + private: + Allocator & a_; + + private: + void priv_deallocate(const pointer &p, allocator_v1) + { AllocTraits::deallocate(a_,p, 1); } + + void priv_deallocate(const pointer &p, allocator_v2) + { a_.deallocate_one(p); } + + public: + allocator_destroyer(Allocator &a) + : a_(a) + {} + + void operator()(const pointer &p) + { + AllocTraits::destroy(a_, container_detail::to_raw_pointer(p)); + priv_deallocate(p, alloc_version()); + } +}; + + +} //namespace container_detail { +} //namespace container { +} //namespace boost { + +#include <boost/container/detail/config_end.hpp> + +#endif //#ifndef BOOST_CONTAINER_DESTROYERS_HPP |