Shared memory access control mechanism for processes created by MPI

Question

I have a shared memory used by multiple processes, these processes are created using MPI.

Now I need a mechanism to control the access of this shared me

Answer 1

MPI actually does provide support for shared memory now (as of version 3.0). You might try looking at the One-sided communication chapter (http://www.mpi-forum.org/docs/mpi-3.0/mpi30-report.pdf) starting with MPI_WIN_ALLOCATE_SHARED (11.2.3). To use this, you'll have to make sure you have an implementation that supports it. I know that the most recent versions of both MPICH and Open MPI work.