1 // Boost.Signals library
3 // Copyright Douglas Gregor 2001-2004. Use, modification and
4 // distribution is subject to the Boost Software License, Version
5 // 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6 // http://www.boost.org/LICENSE_1_0.txt)
8 // For more information, see http://www.boost.org
10 #ifndef BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
11 #define BOOST_SIGNALS_NAMED_SLOT_MAP_HPP
13 #include <boost/signals/detail/config.hpp>
14 #include <boost/signals/detail/signals_common.hpp>
15 #include <boost/signals/connection.hpp>
16 #include <boost/utility.hpp>
17 #include <boost/shared_ptr.hpp>
18 #include <boost/function/function2.hpp>
19 #include <boost/iterator/iterator_facade.hpp>
24 namespace boost { namespace BOOST_SIGNALS_NAMESPACE {
26 enum connect_position { at_back, at_front };
33 enum storage_kind { sk_empty, sk_front, sk_back, sk_group };
35 stored_group(storage_kind kind = sk_empty) : kind(kind), group() { }
38 stored_group(const T& group) : kind(sk_group), group(new T(group)) { }
40 bool is_front() const { return kind == sk_front; }
41 bool is_back() const { return kind == sk_back; }
42 bool empty() const { return kind == sk_empty; }
44 void* get() const { return group.get(); }
48 shared_ptr<void> group;
51 typedef function2<bool, stored_group, stored_group> compare_type;
53 // This function object bridges from a pair of any objects that hold
54 // values of type Key to the underlying function object that compares
55 // values of type Key.
56 template<typename Compare, typename Key>
57 class group_bridge_compare {
59 typedef bool result_type;
60 typedef const stored_group& first_argument_type;
61 typedef const stored_group& second_argument_type;
63 group_bridge_compare(const Compare& c) : comp(c) {}
65 bool operator()(const stored_group& k1, const stored_group& k2) const
67 if (k1.is_front()) return !k2.is_front();
68 if (k1.is_back()) return false;
69 if (k2.is_front()) return false;
70 if (k2.is_back()) return true;
72 // Neither is empty, so compare their values to order them
73 return comp(*static_cast<Key*>(k1.get()), *static_cast<Key*>(k2.get()));
80 class BOOST_SIGNALS_DECL named_slot_map_iterator :
81 public iterator_facade<named_slot_map_iterator,
83 forward_traversal_tag>
85 typedef std::list<connection_slot_pair> group_list;
86 typedef group_list::iterator slot_pair_iterator;
87 typedef std::map<stored_group, group_list, compare_type> slot_container_type;
88 typedef slot_container_type::iterator group_iterator;
89 typedef slot_container_type::const_iterator const_group_iterator;
91 typedef iterator_facade<named_slot_map_iterator,
93 forward_traversal_tag> inherited;
95 named_slot_map_iterator();
96 named_slot_map_iterator(const named_slot_map_iterator&);
97 named_slot_map_iterator& operator=(const named_slot_map_iterator&);
99 connection_slot_pair& dereference() const;
101 bool equal(const named_slot_map_iterator& other) const;
103 #if BOOST_WORKAROUND(_MSC_VER, <= 1400)
105 void advance(difference_type);
109 named_slot_map_iterator(group_iterator group, group_iterator last) :
110 group(group), last_group(last), slot_assigned(false)
111 { init_next_group(); }
112 named_slot_map_iterator(group_iterator group, group_iterator last,
113 slot_pair_iterator slot) :
114 group(group), last_group(last), slot_(slot), slot_assigned(true)
117 void init_next_group()
119 while (group != last_group && group->second.empty()) ++group;
120 if (group != last_group) {
121 slot_ = group->second.begin();
122 slot_assigned = true;
126 group_iterator group;
127 group_iterator last_group;
128 slot_pair_iterator slot_;
131 friend class named_slot_map;
134 class BOOST_SIGNALS_DECL named_slot_map
137 typedef named_slot_map_iterator iterator;
139 named_slot_map(const compare_type& compare);
144 iterator insert(const stored_group& name, const connection& con,
145 const any& slot, connect_position at);
146 void disconnect(const stored_group& name);
147 void erase(iterator pos);
148 void remove_disconnected_slots();
151 typedef std::list<connection_slot_pair> group_list;
152 typedef std::map<stored_group, group_list, compare_type> slot_container_type;
153 typedef slot_container_type::iterator group_iterator;
154 typedef slot_container_type::const_iterator const_group_iterator;
156 bool empty(const_group_iterator group) const
158 return (group->second.empty() && group != groups.begin() && group != back);
160 slot_container_type groups;
166 #endif // BOOST_SIGNALS_NAMED_SLOT_MAP_HPP