#include <boost/interprocess/managed_mapped_file.hpp>
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/containers/string.hpp>
#include <boost/flyweight.hpp>
#include <boost/flyweight/no_tracking.hpp>
#include <boost/flyweight/hashed_factory.hpp>

using namespace boost::flyweights;
using namespace boost::container;
using namespace boost::interprocess;



typedef boost::interprocess::allocator<boost::mpl::_1, boost::interprocess::managed_mapped_file::segment_manager> ShmFactoryEntryAllocator;

typedef boost::interprocess::allocator<char, boost::interprocess::managed_mapped_file::segment_manager> ShmAllocatorChar;

typedef boost::interprocess::basic_string<char, std::char_traits<char>, ShmAllocatorChar> ShmString;

// TODO: using ShmFactoryEntryAllocator does not work
typedef boost::flyweights::hashed_factory<boost::hash<ShmString>, std::equal_to<ShmString>, ShmFactoryEntryAllocator> ShmStringHashedFactory;
//typedef boost::flyweights::hashed_factory<boost::hash<ShmString>, std::equal_to<ShmString>, std::allocator<boost::mpl::_1> > ShmStringHashedFactory;

// TODO: need to be able to use a hashed_factory with our custom allocator.
//typedef boost::flyweights::flyweight<ShmString, ShmStringHashedFactory> ShmFlyweightString;
typedef boost::flyweights::flyweight<ShmString> ShmFlyweightString;


// ---------------


int main(int argc, char** argv)
{
    managed_mapped_file *segment = new managed_mapped_file(create_only, "memory.dat", 409600);
    ShmFactoryEntryAllocator factoryEntryAllocator(segment->get_segment_manager());


    // create a normal string in shared memory.
    //ShmString s1("some shm normal string", factoryEntryAllocator);

    // create a normal string in shared-memory, including the class itself.
    ShmString *ps1 = segment->construct<ShmString>("s1")("some shm normal string", factoryEntryAllocator);
    printf("ps1 = %p\n", ps1->c_str());

    // create a flyweight string in shared memory.
    //ShmFlyweightString s2("some shm flyweight string", factoryEntryAllocator);

    // create a flyweight string in shared memory, including the class itself.
    ShmFlyweightString *ps2 = segment->construct<ShmFlyweightString>(anonymous_instance)("some shm flyweight string", factoryEntryAllocator);
    printf("ps2 = %p\n", ps2->get().c_str());

    return 0;
}