113 lines
4.3 KiB
C++
113 lines
4.3 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/config_begin.hpp>
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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/interprocess/containers/map.hpp>
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#include <boost/interprocess/containers/vector.hpp>
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#include <boost/interprocess/containers/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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//Typedefs of allocators and containers
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typedef managed_shared_memory::segment_manager segment_manager_t;
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typedef allocator<void, segment_manager_t> void_allocator;
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typedef allocator<int, segment_manager_t> int_allocator;
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typedef vector<int, int_allocator> int_vector;
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typedef allocator<int_vector, segment_manager_t> int_vector_allocator;
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typedef vector<int_vector, int_vector_allocator> int_vector_vector;
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typedef allocator<char, segment_manager_t> char_allocator;
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typedef basic_string<char, std::char_traits<char>, char_allocator> char_string;
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class complex_data
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{
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int id_;
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char_string char_string_;
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int_vector_vector int_vector_vector_;
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public:
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//Since void_allocator is convertible to any other allocator<T>, we can simplify
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//the initialization taking just one allocator for all inner containers.
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complex_data(int id, const char *name, const void_allocator &void_alloc)
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: id_(id), char_string_(name, void_alloc), int_vector_vector_(void_alloc)
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{}
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//Other members...
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//<-
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int get_id() { return id_; };
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char_string get_char_string() { return char_string_; };
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int_vector_vector get_int_vector_vector() { return int_vector_vector_; };
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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 char_string, complex_data> map_value_type;
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typedef std::pair<char_string, complex_data> movable_to_map_value_type;
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typedef allocator<map_value_type, segment_manager_t> map_value_type_allocator;
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typedef map< char_string, complex_data
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, std::less<char_string>, map_value_type_allocator> complex_map_type;
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int main ()
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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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//<-
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#if 1
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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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#else
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//->
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shm_remove() { shared_memory_object::remove("MySharedMemory"); }
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~shm_remove(){ shared_memory_object::remove("MySharedMemory"); }
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//<-
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#endif
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//->
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} remover;
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//<-
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(void)remover;
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//->
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//Create shared memory
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//<-
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#if 1
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managed_shared_memory segment(create_only,test::get_process_id_name(), 65536);
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#else
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//->
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managed_shared_memory segment(create_only,"MySharedMemory", 65536);
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//<-
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#endif
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//->
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//An allocator convertible to any allocator<T, segment_manager_t> type
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void_allocator alloc_inst (segment.get_segment_manager());
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//Construct the shared memory map and fill it
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complex_map_type *mymap = segment.construct<complex_map_type>
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//(object name), (first ctor parameter, second ctor parameter)
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("MyMap")(std::less<char_string>(), alloc_inst);
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for(int i = 0; i < 100; ++i){
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//Both key(string) and value(complex_data) need an allocator in their constructors
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char_string key_object(alloc_inst);
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complex_data mapped_object(i, "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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}
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return 0;
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}
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//]
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#include <boost/interprocess/detail/config_end.hpp>
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