1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost
// Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#include <boost/interprocess/detail/workaround.hpp>
#if BOOST_CXX_VERSION >= 201103L
//[doc_multi_index
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/container/string.hpp>
//<-
//Shield against external warnings
#include <boost/interprocess/detail/config_external_begin.hpp>
//->
#include <boost/multi_index_container.hpp>
#include <boost/multi_index/member.hpp>
#include <boost/multi_index/ordered_index.hpp>
//<-
#include <boost/interprocess/detail/config_external_end.hpp>
#include "../test/get_process_id_name.hpp"
//->
using namespace boost::interprocess;
namespace bmi = boost::multi_index;
typedef managed_shared_memory::allocator<char>::type char_allocator;
typedef boost::container::basic_string<char, std::char_traits<char>, char_allocator>shm_string;
//Data to insert in shared memory
struct employee
{
int id;
int age;
shm_string name;
employee( int id_
, int age_
, const char *name_
, const char_allocator &a)
: id(id_), age(age_), name(name_, a)
{}
};
//Tags
struct id{};
struct age{};
struct name{};
// Define a multi_index_container of employees with following indices:
// - a unique index sorted by employee::int,
// - a non-unique index sorted by employee::name,
// - a non-unique index sorted by employee::age.
typedef bmi::multi_index_container<
employee,
bmi::indexed_by<
bmi::ordered_unique
<bmi::tag<id>, bmi::member<employee,int,&employee::id> >,
bmi::ordered_non_unique<
bmi::tag<name>, bmi::member<employee,shm_string,&employee::name> >,
bmi::ordered_non_unique
<bmi::tag<age>, bmi::member<employee,int,&employee::age> > >,
managed_shared_memory::allocator<employee>::type
> employee_set;
int main ()
{
//Remove shared memory on construction and destruction
struct shm_remove
{
shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
} remover;
//<-
(void)remover;
//->
//Create shared memory
managed_shared_memory segment(create_only,test::get_process_id_name(), 65536);
//Construct the multi_index in shared memory
employee_set *es = segment.construct<employee_set>
("My MultiIndex Container") //Container's name in shared memory
( employee_set::ctor_args_list()
, segment.get_allocator<employee>()); //Ctor parameters
//Now insert elements
char_allocator ca(segment.get_allocator<char>());
es->insert(employee(0,31, "Joe", ca));
es->insert(employee(1,27, "Robert", ca));
es->insert(employee(2,40, "John", ca));
return 0;
}
//]
#else ////#if BOOST_CXX_VERSION >= 201103L
int main()
{
return 0;
}
#endif //#if BOOST_CXX_VERSION >= 201103L
|
