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87 lines
3.1 KiB
C++
87 lines
3.1 KiB
C++
//////////////////////////////////////////////////////////////////////////////
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//
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// (C) Copyright Ion Gaztanaga 2006-2012. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/interprocess for documentation.
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//
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//////////////////////////////////////////////////////////////////////////////
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#include <boost/interprocess/detail/workaround.hpp>
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//[doc_complex_map
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#include <boost/interprocess/managed_shared_memory.hpp>
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#include <boost/interprocess/allocators/allocator.hpp>
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#include <boost/container/map.hpp>
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#include <boost/container/vector.hpp>
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#include <boost/container/string.hpp>
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//<-
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#include "../test/get_process_id_name.hpp"
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//->
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using namespace boost::interprocess;
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namespace bc = boost::container;
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//Typedefs of allocators and containers
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typedef managed_shared_memory::segment_manager seg_mngr_t;
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typedef allocator<void, seg_mngr_t> void_alloc_t;
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typedef bc::vector<int, allocator<int, seg_mngr_t> > int_vec_t;
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typedef bc::vector<int_vec_t, allocator<int_vec_t, seg_mngr_t> > int_vec_vec_t;
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typedef bc::basic_string
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<char, std::char_traits<char>, allocator<char, seg_mngr_t> > string_t;
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class complex_data
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{
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string_t string_;
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int_vec_vec_t int_vec_vec_;
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public:
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complex_data(const char *name, const void_alloc_t &valloc) //void_alloc_t is convertible to allocator<T>
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: string_(name, valloc), int_vec_vec_(valloc)
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{}
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//<-
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string_t get_char_string() { return string_; };
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int_vec_vec_t get_int_vector_vector() { return int_vec_vec_; };
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//->
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};
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//Definition of the map holding a string as key and complex_data as mapped type
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typedef std::pair<const string_t, complex_data> map_value_type;
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typedef allocator<map_value_type, seg_mngr_t> map_value_type_allocator;
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typedef bc::map< string_t, complex_data, std::less<string_t>
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, map_value_type_allocator> complex_map_type;
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int main ()
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{
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//<-
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//Remove shared memory on construction and destruction
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struct shm_remove
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{
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shm_remove() { shared_memory_object::remove(test::get_process_id_name()); }
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~shm_remove(){ shared_memory_object::remove(test::get_process_id_name()); }
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} remover;
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(void)remover;
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//->
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managed_shared_memory segment(create_only,test::get_process_id_name(), 65536); //Create shared memory
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//An allocator convertible to any allocator<T, seg_mngr_t> type
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void_alloc_t alloc_inst (segment.get_segment_manager());
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//Construct the map calling map(key_compare, allocator_type), the allocator argument is explicit
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complex_map_type *mymap = segment.construct<complex_map_type>
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("MyMap")(std::less<string_t>(), alloc_inst);
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//Both key(string) and value(complex_data) need an allocator in their constructors
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string_t key_object(alloc_inst);
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complex_data mapped_object("default_name", alloc_inst);
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map_value_type value(key_object, mapped_object);
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//Modify values and insert them in the map
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mymap->insert(value);
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return 0;
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}
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//]
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