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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
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