[Boost-users] Newbie question conerning interprocess stuff

From: Wolfgang Hottgenroth (woho_at_[hidden])
Date: 2007-01-19 11:10:19

Hi,

I'm a complete newbie with boost and have a question concerning the
interprocess stuff.

I took the piece of code to share a vector in shared memory between two
processes from the quick-start guide as a start point and it compiled
and ran immediately with success for me.

Then I tried to replace the vector by a map:

#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/containers/map.hpp>
#include <boost/interprocess/allocators/allocator.hpp>

using namespace std;

int main ()
{
  boost::interprocess::shared_memory_object::remove("MySharedMemory");
  boost::interprocess::managed_shared_memory
segment(boost::interprocess::create_only, "MySharedMemory"
,65536);          //segment size in bytes

  typedef pair<const int, int> MyPair;
  typedef boost::interprocess::allocator<MyPair,
boost::interprocess::managed_shared_memory::segment_manager> ShmemAllocator;

  typedef boost::interprocess::map<int, int, less<int>, ShmemAllocator>
MyMap;

  const ShmemAllocator alloc_inst (segment.get_segment_manager());

  MyMap *mymap = segment.construct<MyMap>("MyMap")(alloc_inst);

//    mymap->insert(make_pair(1,10));
//    mymap->insert(make_pair(2,20));
//    mymap->insert(make_pair(3,30));
//    mymap->insert(make_pair(4,40));
//    mymap->insert(make_pair(5,50));

   return 0;
}

and I wasn't able to compile it any more. (I've put the error message
and the sources on the web, find it here: http://www.hottis.de/boost/)

I think it is the segment.construct line, although I don't find a direct
hint in the error message from the compiler, but if I comment out this
line, the compiler is happy.

Has any one any hint for me?

Thank you very much,
Wolfgang