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#include <mpi.h>
#include <iostream>
static void sayhello(MPI_Comm comm)
{
if (comm == MPI_COMM_NULL) {
std::cout << "You passed MPI_COMM_NULL !!!" << std::endl;
return;
}
int size;
MPI_Comm_size(comm, &size);
int rank;
MPI_Comm_rank(comm, &rank);
int plen; char pname[MPI_MAX_PROCESSOR_NAME];
MPI_Get_processor_name(pname, &plen);
std::cout <<
"Hello, World! " <<
"I am process " << rank <<
" of " << size <<
" on " << pname <<
"." << std::endl;
}
#include <boost/python.hpp>
#include <mpi4py/mpi4py.h>
using namespace boost::python;
static void hw_sayhello(object py_comm)
{
PyObject* py_obj = py_comm.ptr();
MPI_Comm *comm_p = PyMPIComm_Get(py_obj);
if (comm_p == NULL) throw_error_already_set();
sayhello(*comm_p);
}
BOOST_PYTHON_MODULE(helloworld)
{
if (import_mpi4py() < 0) return; /* Python 2.X */
def("sayhello", hw_sayhello);
}
/*
* Local Variables:
* mode: C++
* End:
*/
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