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
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
22using namespace boost::interprocess;
23
24//Typedefs of allocators and containers
25typedef managed_shared_memory::segment_manager segment_manager_t;
26typedef allocator<void, segment_manager_t> void_allocator;
27typedef allocator<int, segment_manager_t> int_allocator;
28typedef vector<int, int_allocator> int_vector;
29typedef allocator<int_vector, segment_manager_t> int_vector_allocator;
30typedef vector<int_vector, int_vector_allocator> int_vector_vector;
31typedef allocator<char, segment_manager_t> char_allocator;
32typedef basic_string<char, std::char_traits<char>, char_allocator> char_string;
33
34class 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.
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 //<-
48 int get_id() { return id_; };
49 char_string get_char_string() { return char_string_; };
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
55typedef std::pair<const char_string, complex_data> map_value_type;
56typedef std::pair<char_string, complex_data> movable_to_map_value_type;
57typedef allocator<map_value_type, segment_manager_t> map_value_type_allocator;
58typedef map< char_string, complex_data
59 , std::less<char_string>, map_value_type_allocator> complex_map_type;
60
61int 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(filename: test::get_process_id_name()); }
69 ~shm_remove(){ shared_memory_object::remove(filename: 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 (name: "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(x&: value);
108 }
109 return 0;
110}
111//]
112
113

source code of boost/libs/interprocess/example/doc_complex_map.cpp