1 //////////////////////////////////////////////////////////////////////////////
2 //
3 // (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost
4 // Software License, Version 1.0. (See accompanying file
5 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
6 //
7 // See http://www.boost.org/libs/interprocess for documentation.
8 //
9 //////////////////////////////////////////////////////////////////////////////
10 #include <boost/interprocess/detail/config_begin.hpp>
11 #include <boost/interprocess/detail/workaround.hpp>
12 //[doc_complex_map
13 #include <boost/interprocess/managed_shared_memory.hpp>
14 #include <boost/interprocess/allocators/allocator.hpp>
15 #include <boost/interprocess/containers/map.hpp>
16 #include <boost/interprocess/containers/vector.hpp>
17 #include <boost/interprocess/containers/string.hpp>
18 //<-
19 #include "../test/get_process_id_name.hpp"
20 //->
21
22 using namespace boost::interprocess;
23
24 //Typedefs of allocators and containers
25 typedef managed_shared_memory::segment_manager segment_manager_t;
26 typedef allocator<void, segment_manager_t> void_allocator;
27 typedef allocator<int, segment_manager_t> int_allocator;
28 typedef vector<int, int_allocator> int_vector;
29 typedef allocator<int_vector, segment_manager_t> int_vector_allocator;
30 typedef vector<int_vector, int_vector_allocator> int_vector_vector;
31 typedef allocator<char, segment_manager_t> char_allocator;
32 typedef basic_string<char, std::char_traits<char>, char_allocator> char_string;
33
34 class complex_data
35 {
36 int id_;
37 char_string char_string_;
38 int_vector_vector int_vector_vector_;
39
40 public:
41 //Since void_allocator is convertible to any other allocator<T>, we can simplify
42 //the initialization taking just one allocator for all inner containers.
complex_data(int id,const char * name,const void_allocator & void_alloc)43 complex_data(int id, const char *name, const void_allocator &void_alloc)
44 : id_(id), char_string_(name, void_alloc), int_vector_vector_(void_alloc)
45 {}
46 //Other members...
47 //<-
get_id()48 int get_id() { return id_; };
get_char_string()49 char_string get_char_string() { return char_string_; };
get_int_vector_vector()50 int_vector_vector get_int_vector_vector() { return int_vector_vector_; };
51 //->
52 };
53
54 //Definition of the map holding a string as key and complex_data as mapped type
55 typedef std::pair<const char_string, complex_data> map_value_type;
56 typedef std::pair<char_string, complex_data> movable_to_map_value_type;
57 typedef allocator<map_value_type, segment_manager_t> map_value_type_allocator;
58 typedef map< char_string, complex_data
59 , std::less<char_string>, map_value_type_allocator> complex_map_type;
60
main()61 int main ()
62 {
63 //Remove shared memory on construction and destruction
64 struct shm_remove
65 {
66 //<-
67 #if 1
68 shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
69 ~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
70 #else
71 //->
72 shm_remove() { shared_memory_object::remove("MySharedMemory"); }
73 ~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
74 //<-
75 #endif
76 //->
77 } remover;
78 //<-
79 (void)remover;
80 //->
81
82 //Create shared memory
83 //<-
84 #if 1
85 managed_shared_memory segment(create_only,test::get_process_id_name(), 65536);
86 #else
87 //->
88 managed_shared_memory segment(create_only,"MySharedMemory", 65536);
89 //<-
90 #endif
91 //->
92
93 //An allocator convertible to any allocator<T, segment_manager_t> type
94 void_allocator alloc_inst (segment.get_segment_manager());
95
96 //Construct the shared memory map and fill it
97 complex_map_type *mymap = segment.construct<complex_map_type>
98 //(object name), (first ctor parameter, second ctor parameter)
99 ("MyMap")(std::less<char_string>(), alloc_inst);
100
101 for(int i = 0; i < 100; ++i){
102 //Both key(string) and value(complex_data) need an allocator in their constructors
103 char_string key_object(alloc_inst);
104 complex_data mapped_object(i, "default_name", alloc_inst);
105 map_value_type value(key_object, mapped_object);
106 //Modify values and insert them in the map
107 mymap->insert(value);
108 }
109 return 0;
110 }
111 //]
112 #include <boost/interprocess/detail/config_end.hpp>
113