Function mpi::ffi::PMPI_Win_allocate_shared

pub unsafe extern fn PMPI_Win_allocate_shared(size: MPI_Aint,
                                              disp_unit: c_int,
                                              info: MPI_Info,
                                              comm: MPI_Comm,
                                              baseptr: *mut c_void,
                                              win: *mut MPI_Win)
                                              -> c_int