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/////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2007-2013
//
// 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/intrusive for documentation.
//
/////////////////////////////////////////////////////////////////////////////
#ifndef BOOST_INTRUSIVE_GENERIC_HOOK_HPP
#define BOOST_INTRUSIVE_GENERIC_HOOK_HPP
#include <boost/intrusive/detail/config_begin.hpp>
#include <boost/intrusive/intrusive_fwd.hpp>
#include <boost/intrusive/pointer_traits.hpp>
#include <boost/intrusive/link_mode.hpp>
#include <boost/intrusive/detail/utilities.hpp>
#include <boost/intrusive/detail/mpl.hpp>
#include <boost/intrusive/pointer_traits.hpp>
#include <boost/static_assert.hpp>
namespace boost {
namespace intrusive {
/// @cond
enum base_hook_type
{ NoBaseHookId
, ListBaseHookId
, SlistBaseHookId
, RbTreeBaseHookId
, HashBaseHookId
, AvlTreeBaseHookId
, BsTreeBaseHookId
, TreapTreeBaseHookId
, AnyBaseHookId
};
template <class HookTags, unsigned int>
struct hook_tags_definer{};
template <class HookTags>
struct hook_tags_definer<HookTags, ListBaseHookId>
{ typedef HookTags default_list_hook; };
template <class HookTags>
struct hook_tags_definer<HookTags, SlistBaseHookId>
{ typedef HookTags default_slist_hook; };
template <class HookTags>
struct hook_tags_definer<HookTags, RbTreeBaseHookId>
{ typedef HookTags default_rbtree_hook; };
template <class HookTags>
struct hook_tags_definer<HookTags, HashBaseHookId>
{ typedef HookTags default_hashtable_hook; };
template <class HookTags>
struct hook_tags_definer<HookTags, AvlTreeBaseHookId>
{ typedef HookTags default_avltree_hook; };
template <class HookTags>
struct hook_tags_definer<HookTags, BsTreeBaseHookId>
{ typedef HookTags default_bstree_hook; };
template <class HookTags>
struct hook_tags_definer<HookTags, AnyBaseHookId>
{ typedef HookTags default_any_hook; };
template
< class NodeTraits
, class Tag
, link_mode_type LinkMode
, base_hook_type BaseHookType
>
struct hooktags_impl
{
static const link_mode_type link_mode = LinkMode;
typedef Tag tag;
typedef NodeTraits node_traits;
static const bool is_base_hook = !detail::is_same<Tag, member_tag>::value;
static const bool safemode_or_autounlink = is_safe_autounlink<link_mode>::value;
static const unsigned int type = BaseHookType;
};
/// @endcond
template
< class GetNodeAlgorithms
, class Tag
, link_mode_type LinkMode
, base_hook_type BaseHookType
>
class generic_hook
/// @cond
//If the hook is a base hook, derive generic hook from node_holder
//so that a unique base class is created to convert from the node
//to the type. This mechanism will be used by bhtraits.
//
//If the hook is a member hook, generic hook will directly derive
//from the hook.
: public detail::if_c
< detail::is_same<Tag, member_tag>::value
, typename GetNodeAlgorithms::type::node
, node_holder<typename GetNodeAlgorithms::type::node, Tag, BaseHookType>
>::type
//If this is the a default-tagged base hook derive from a class that
//will define an special internal typedef. Containers will be able to detect this
//special typedef and obtain generic_hook's internal types in order to deduce
//value_traits for this hook.
, public hook_tags_definer
< generic_hook<GetNodeAlgorithms, Tag, LinkMode, BaseHookType>
, detail::is_same<Tag, default_tag>::value*BaseHookType>
/// @endcond
{
/// @cond
typedef typename GetNodeAlgorithms::type node_algorithms;
typedef typename node_algorithms::node node;
typedef typename node_algorithms::node_ptr node_ptr;
typedef typename node_algorithms::const_node_ptr const_node_ptr;
public:
typedef hooktags_impl
< typename GetNodeAlgorithms::type::node_traits
, Tag, LinkMode, BaseHookType> hooktags;
node_ptr this_ptr()
{ return pointer_traits<node_ptr>::pointer_to(static_cast<node&>(*this)); }
const_node_ptr this_ptr() const
{ return pointer_traits<const_node_ptr>::pointer_to(static_cast<const node&>(*this)); }
public:
/// @endcond
generic_hook()
{
if(hooktags::safemode_or_autounlink){
node_algorithms::init(this->this_ptr());
}
}
generic_hook(const generic_hook& )
{
if(hooktags::safemode_or_autounlink){
node_algorithms::init(this->this_ptr());
}
}
generic_hook& operator=(const generic_hook& )
{ return *this; }
~generic_hook()
{
destructor_impl
(*this, detail::link_dispatch<hooktags::link_mode>());
}
void swap_nodes(generic_hook &other)
{
node_algorithms::swap_nodes
(this->this_ptr(), other.this_ptr());
}
bool is_linked() const
{
//is_linked() can be only used in safe-mode or auto-unlink
BOOST_STATIC_ASSERT(( hooktags::safemode_or_autounlink ));
return !node_algorithms::unique(this->this_ptr());
}
void unlink()
{
BOOST_STATIC_ASSERT(( (int)hooktags::link_mode == (int)auto_unlink ));
node_algorithms::unlink(this->this_ptr());
node_algorithms::init(this->this_ptr());
}
};
} //namespace intrusive
} //namespace boost
#include <boost/intrusive/detail/config_end.hpp>
#endif //BOOST_INTRUSIVE_GENERIC_HOOK_HPP
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