| 1 |
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| 2 | #include <iostream>
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| 3 | #include <string>
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| 4 | #include <boost/noncopyable.hpp>
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| 5 | #include <boost/intrusive/list.hpp>
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| 6 | #include <boost/intrusive/set.hpp>
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| 7 |
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| 8 | namespace intrusive = boost::intrusive;
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| 9 |
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| 10 | class object : public boost::noncopyable
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| 11 | {
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| 12 | public:
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| 13 | object()
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| 14 | {
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| 15 | }
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| 16 | virtual ~object()
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| 17 | {
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| 18 | }
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| 19 | };
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| 20 |
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| 21 |
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| 22 | class signal : virtual public object
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| 23 | {
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| 24 | public:
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| 25 | signal()
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| 26 | {
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| 27 | }
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| 28 | virtual ~signal()
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| 29 | {
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| 30 | }
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| 31 | };
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| 32 |
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| 33 |
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| 34 | class set_item : public signal
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| 35 | {
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| 36 | public:
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| 37 | set_item()
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| 38 | {
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| 39 | }
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| 40 | virtual ~set_item()
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| 41 | {
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| 42 | }
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| 43 |
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| 44 | public:
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| 45 | virtual const std::string& get_buffer() const
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| 46 | {
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| 47 | return m_buffer;
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| 48 | }
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| 49 |
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| 50 | typedef intrusive::set_member_hook<
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| 51 | intrusive::link_mode<intrusive::auto_unlink>
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| 52 | > hook;
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| 53 | hook m_hook;
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| 54 |
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| 55 | std::string m_buffer;
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| 56 | };
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| 57 |
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| 58 |
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| 59 | template <class T, class M, M (T::*V)>
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| 60 | struct member_comparator
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| 61 | {
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| 62 | bool operator()(const T& t1, const T& t2) const
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| 63 | {
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| 64 | return (t1.*V) < (t2.*V);
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| 65 | }
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| 66 | bool operator()(const M& m, const T& t) const
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| 67 | {
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| 68 | return m < (t.*V);
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| 69 | }
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| 70 | bool operator()(const T& t, const M& m) const
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| 71 | {
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| 72 | return (t.*V) < m;
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| 73 | }
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| 74 | };
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| 75 |
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| 76 | class list_item : virtual public object
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| 77 | {
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| 78 | public:
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| 79 | list_item()
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| 80 | {
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| 81 | }
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| 82 | virtual ~list_item()
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| 83 | {
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| 84 | }
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| 85 |
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| 86 | virtual void f()
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| 87 | {
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| 88 | }
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| 89 |
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| 90 | typedef intrusive::list_member_hook<
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| 91 | intrusive::link_mode<intrusive::auto_unlink>
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| 92 | > hook;
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| 93 | hook m_hook;
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| 94 | };
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| 95 |
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| 96 |
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| 97 | int main(int argc, char** argv)
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| 98 | {
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| 99 | {
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| 100 | typedef member_comparator<
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| 101 | set_item,
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| 102 | std::string,
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| 103 | &set_item::m_buffer
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| 104 | > set_item_comparator;
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| 105 |
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| 106 | typedef intrusive::set<
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| 107 | set_item,
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| 108 | intrusive::compare<set_item_comparator>,
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| 109 | intrusive::member_hook<
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| 110 | set_item,
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| 111 | set_item::hook,
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| 112 | &set_item::m_hook
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| 113 | >,
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| 114 | intrusive::constant_time_size<false>
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| 115 | > set_items
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| 116 | ;
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| 117 |
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| 118 | union
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| 119 | {
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| 120 | int32_t as_int;
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| 121 | const set_item::hook set_item::* ptr_to_member;
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| 122 | }
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| 123 | sss;
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| 124 | sss.ptr_to_member = &set_item::m_hook;
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| 125 |
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| 126 | std::cout << "set offsets: " << sss.as_int << " and " << offsetof(set_item,m_hook) << std::endl;
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| 127 |
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| 128 | set_items rr;
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| 129 |
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| 130 | std::string key = "123";
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| 131 | set_items::insert_commit_data icd;
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| 132 | std::pair<set_items::iterator,bool> ir = rr.insert_check(
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| 133 | key,
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| 134 | set_item_comparator(),
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| 135 | icd
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| 136 | );
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| 137 |
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| 138 | if ( !ir.second )
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| 139 | {
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| 140 | throw std::exception();
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| 141 | }
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| 142 |
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| 143 | set_item rec;
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| 144 | rec.m_buffer = key;
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| 145 | set_items::iterator i = rr.insert_commit( rec, icd );
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| 146 |
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| 147 | set_item* rrr = &(*i);
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| 148 |
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| 149 | std::cout << "set pointers: " << ((void*)rrr) << " and " << ((void*)&rec) << std::endl;
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| 150 | }
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| 151 |
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| 152 | {
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| 153 | typedef intrusive::list<
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| 154 | list_item,
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| 155 | intrusive::member_hook<
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| 156 | list_item,
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| 157 | list_item::hook,
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| 158 | &list_item::m_hook
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| 159 | >,
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| 160 | intrusive::constant_time_size<false>
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| 161 | > list_items
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| 162 | ;
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| 163 |
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| 164 | union
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| 165 | {
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| 166 | int32_t as_int;
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| 167 | const list_item::hook list_item::* ptr_to_member;
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| 168 | }
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| 169 | sss;
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| 170 | sss.ptr_to_member = &list_item::m_hook;
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| 171 |
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| 172 | std::cout << "list offsets: " << sss.as_int << " and " << offsetof(list_item,m_hook) << std::endl;
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| 173 |
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| 174 | list_items rr;
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| 175 |
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| 176 | list_item rec;
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| 177 | rr.push_back( rec );
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| 178 |
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| 179 | list_item* rrr = &rr.front();
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| 180 |
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| 181 | std::cout << "list pointers: " << ((void*)rrr) << " and " << ((void*)&rec) << std::endl;
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| 182 | }
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| 183 |
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| 184 | return 0;
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| 185 | }
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