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authorAnas Nashif <anas.nashif@intel.com>2012-10-30 12:57:26 -0700
committerAnas Nashif <anas.nashif@intel.com>2012-10-30 12:57:26 -0700
commit1a78a62555be32868418fe52f8e330c9d0f95d5a (patch)
treed3765a80e7d3b9640ec2e930743630cd6b9fce2b /boost/container/detail/destroyers.hpp
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Imported Upstream version 1.49.0upstream/1.49.0
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+//////////////////////////////////////////////////////////////////////////////
+//
+// (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