224 lines
6.3 KiB
Plaintext
224 lines
6.3 KiB
Plaintext
/////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2007-2013
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (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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//
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// See http://www.boost.org/libs/intrusive for documentation.
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//
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/////////////////////////////////////////////////////////////////////////////
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#ifndef BOOST_INTRUSIVE_GENERIC_HOOK_HPP
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#define BOOST_INTRUSIVE_GENERIC_HOOK_HPP
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#ifndef BOOST_CONFIG_HPP
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# include <boost/config.hpp>
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#endif
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#if defined(BOOST_HAS_PRAGMA_ONCE)
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# pragma once
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#endif
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#include <boost/intrusive/pointer_traits.hpp>
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#include <boost/intrusive/link_mode.hpp>
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#include <boost/intrusive/detail/mpl.hpp>
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#include <boost/intrusive/detail/assert.hpp>
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#include <boost/intrusive/detail/node_holder.hpp>
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#include <boost/intrusive/detail/algo_type.hpp>
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#include <boost/static_assert.hpp>
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namespace boost {
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namespace intrusive {
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/// @cond
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namespace detail {
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template <link_mode_type LinkMode>
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struct link_dispatch
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{};
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template<class Hook>
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void destructor_impl(Hook &hook, detail::link_dispatch<safe_link>)
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{ //If this assertion raises, you might have destroyed an object
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//while it was still inserted in a container that is alive.
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//If so, remove the object from the container before destroying it.
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(void)hook; BOOST_INTRUSIVE_SAFE_HOOK_DESTRUCTOR_ASSERT(!hook.is_linked());
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}
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template<class Hook>
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void destructor_impl(Hook &hook, detail::link_dispatch<auto_unlink>)
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{ hook.unlink(); }
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template<class Hook>
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void destructor_impl(Hook &, detail::link_dispatch<normal_link>)
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{}
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} //namespace detail {
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enum base_hook_type
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{ NoBaseHookId
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, ListBaseHookId
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, SlistBaseHookId
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, RbTreeBaseHookId
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, HashBaseHookId
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, AvlTreeBaseHookId
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, BsTreeBaseHookId
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, TreapTreeBaseHookId
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, AnyBaseHookId
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};
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template <class HookTags, unsigned int>
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struct hook_tags_definer{};
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template <class HookTags>
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struct hook_tags_definer<HookTags, ListBaseHookId>
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{ typedef HookTags default_list_hook; };
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template <class HookTags>
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struct hook_tags_definer<HookTags, SlistBaseHookId>
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{ typedef HookTags default_slist_hook; };
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template <class HookTags>
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struct hook_tags_definer<HookTags, RbTreeBaseHookId>
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{ typedef HookTags default_rbtree_hook; };
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template <class HookTags>
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struct hook_tags_definer<HookTags, HashBaseHookId>
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{ typedef HookTags default_hashtable_hook; };
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template <class HookTags>
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struct hook_tags_definer<HookTags, AvlTreeBaseHookId>
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{ typedef HookTags default_avltree_hook; };
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template <class HookTags>
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struct hook_tags_definer<HookTags, BsTreeBaseHookId>
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{ typedef HookTags default_bstree_hook; };
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template <class HookTags>
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struct hook_tags_definer<HookTags, AnyBaseHookId>
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{ typedef HookTags default_any_hook; };
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template
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< class NodeTraits
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, class Tag
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, link_mode_type LinkMode
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, base_hook_type BaseHookType
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>
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struct hooktags_impl
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{
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static const link_mode_type link_mode = LinkMode;
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typedef Tag tag;
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typedef NodeTraits node_traits;
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static const bool is_base_hook = !detail::is_same<Tag, member_tag>::value;
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static const bool safemode_or_autounlink = is_safe_autounlink<link_mode>::value;
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static const unsigned int type = BaseHookType;
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};
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/// @endcond
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template
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< boost::intrusive::algo_types Algo
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, class NodeTraits
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, class Tag
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, link_mode_type LinkMode
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, base_hook_type BaseHookType
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>
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class generic_hook
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/// @cond
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//If the hook is a base hook, derive generic hook from node_holder
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//so that a unique base class is created to convert from the node
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//to the type. This mechanism will be used by bhtraits.
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//
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//If the hook is a member hook, generic hook will directly derive
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//from the hook.
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: public detail::if_c
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< detail::is_same<Tag, member_tag>::value
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, typename NodeTraits::node
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, node_holder<typename NodeTraits::node, Tag, BaseHookType>
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>::type
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//If this is the a default-tagged base hook derive from a class that
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//will define an special internal typedef. Containers will be able to detect this
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//special typedef and obtain generic_hook's internal types in order to deduce
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//value_traits for this hook.
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, public hook_tags_definer
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< generic_hook<Algo, NodeTraits, Tag, LinkMode, BaseHookType>
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, detail::is_same<Tag, dft_tag>::value ? BaseHookType : NoBaseHookId>
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/// @endcond
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{
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/// @cond
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typedef typename get_algo<Algo, NodeTraits>::type node_algorithms;
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typedef typename node_algorithms::node node;
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typedef typename node_algorithms::node_ptr node_ptr;
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typedef typename node_algorithms::const_node_ptr const_node_ptr;
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public:
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typedef hooktags_impl
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< NodeTraits
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, Tag, LinkMode, BaseHookType> hooktags;
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node_ptr this_ptr()
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{ return pointer_traits<node_ptr>::pointer_to(static_cast<node&>(*this)); }
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const_node_ptr this_ptr() const
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{ return pointer_traits<const_node_ptr>::pointer_to(static_cast<const node&>(*this)); }
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public:
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/// @endcond
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generic_hook()
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{
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if(hooktags::safemode_or_autounlink){
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node_algorithms::init(this->this_ptr());
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}
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}
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generic_hook(const generic_hook& )
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{
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if(hooktags::safemode_or_autounlink){
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node_algorithms::init(this->this_ptr());
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}
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}
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generic_hook& operator=(const generic_hook& )
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{ return *this; }
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~generic_hook()
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{
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destructor_impl
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(*this, detail::link_dispatch<hooktags::link_mode>());
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}
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void swap_nodes(generic_hook &other)
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{
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node_algorithms::swap_nodes
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(this->this_ptr(), other.this_ptr());
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}
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bool is_linked() const
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{
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//is_linked() can be only used in safe-mode or auto-unlink
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BOOST_STATIC_ASSERT(( hooktags::safemode_or_autounlink ));
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return !node_algorithms::unique(this->this_ptr());
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}
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void unlink()
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{
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BOOST_STATIC_ASSERT(( (int)hooktags::link_mode == (int)auto_unlink ));
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node_ptr n(this->this_ptr());
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if(!node_algorithms::inited(n)){
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node_algorithms::unlink(n);
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node_algorithms::init(n);
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}
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}
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};
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} //namespace intrusive
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} //namespace boost
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#endif //BOOST_INTRUSIVE_GENERIC_HOOK_HPP
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