1 | #include <boost/interprocess/managed_shared_memory.hpp>
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2 | #include <boost/interprocess/allocators/allocator.hpp>
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3 | #include <boost/interprocess/containers/map.hpp>
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4 | #include <boost/interprocess/containers/vector.hpp>
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5 | #include <boost/interprocess/containers/string.hpp>
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6 |
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7 | using namespace boost::interprocess;
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8 |
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9 | //Typedefs of allocators and containers
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10 | typedef managed_shared_memory::segment_manager segment_manager_t;
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11 | typedef allocator<void, segment_manager_t> void_allocator;
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12 | typedef allocator<int, segment_manager_t> int_allocator;
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13 | typedef vector<int, int_allocator> int_vector;
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14 | typedef allocator<int_vector, segment_manager_t> int_vector_allocator;
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15 | typedef vector<int_vector, int_vector_allocator> int_vector_vector;
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16 | typedef allocator<char, segment_manager_t> char_allocator;
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17 | typedef basic_string<char, std::char_traits<char>, char_allocator> char_string;
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18 |
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19 | class complex_data
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20 | {
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21 | int id_;
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22 | char_string char_string_;
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23 | int_vector_vector int_vector_vector_;
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24 |
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25 | public:
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26 | //Since void_allocator is convertible to any other allocator<T>, we can simplify
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27 | //the initialization taking just one allocator for all inner containers.
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28 | complex_data(int id, const char *name, const void_allocator &void_alloc)
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29 | : id_(id), char_string_(name, void_alloc), int_vector_vector_(void_alloc)
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30 | {}
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31 | //Other members...
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32 | };
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33 |
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34 | //Definition of the map holding a string as key and complex_data as mapped type
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35 | typedef std::pair<const char_string, complex_data> map_value_type;
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36 | typedef std::pair<char_string, complex_data> movable_to_map_value_type;
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37 | typedef allocator<map_value_type, segment_manager_t> map_value_type_allocator;
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38 | typedef map< char_string, complex_data
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39 | , std::less<char_string>, map_value_type_allocator> complex_map_type;
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40 |
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41 | int main ()
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42 | {
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43 | shared_memory_object::remove("MySharedMemory");
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44 | remove_shared_memory_on_destroy remove_on_destroy("MySharedMemory");
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45 | {
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46 | //Create shared memory
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47 | managed_shared_memory segment(create_only,"MySharedMemory", 65536);
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48 |
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49 | //An allocator convertible to any allocator<T, segment_manager_t> type
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50 | void_allocator alloc_inst (segment.get_segment_manager());
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51 |
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52 | //Construct the shared memory map and fill it
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53 | complex_map_type *mymap = segment.construct<complex_map_type>
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54 | //(object name), (first ctor parameter, second ctor parameter)
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55 | ("MyMap")(std::less<char_string>(), alloc_inst);
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56 |
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57 | for(int i = 0; i < 100; ++i){
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58 | //Both key(string) and value(complex_data) need an allocator in their constructors
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59 | char_string key_object(alloc_inst);
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60 | complex_data mapped_object(i, "default_name", alloc_inst);
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61 | map_value_type value(key_object, mapped_object);
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62 | //Modify values and insert them in the map
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63 | mymap->insert(value);
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64 | }
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65 | }
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66 | return 0;
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67 | }
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68 |
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