/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
 *  (C) 2011 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */

/*
  Tests invocation of error handlers on a variety of communicators, including
  COMM_NULL.
*/

#include "mpitestconf.h"
#include <mpi.h>
#include <iostream>
#include "mpitestcxx.h"

/* returns number of errors found */
int testCommCall(MPI::Comm & comm)
{
    int i;
    bool sawException = false;

    comm.Set_errhandler(MPI::ERRORS_THROW_EXCEPTIONS);
    try {
        // Invalid send
        comm.Send(&i, -1, MPI::DATATYPE_NULL, -1, -10);
    } catch(MPI::Exception & ex) {
        // This is good
        sawException = true;
    }
    catch(...) {
        // This is bad
    }
    if (!sawException) {
        int len;
        char commname[MPI_MAX_OBJECT_NAME];
        comm.Get_name(commname, len);
        std::cout << "Did not see MPI exception on invalid call on communicator " <<
            commname << "\n";
    }
    return sawException ? 0 : 1;
}

int testNullCommCall(void)
{
    int i;
    bool sawException = false;
    const MPI::Comm & comm = MPI::COMM_NULL;

    MPI::COMM_WORLD.Set_errhandler(MPI::ERRORS_THROW_EXCEPTIONS);
    try {
        // Invalid send
        comm.Send(&i, -1, MPI::DATATYPE_NULL, -1, -10);
    } catch(MPI::Exception & ex) {
        // This is good
        sawException = true;
    }
    catch(...) {
        // This is bad
    }
    if (!sawException) {
        std::cout << "Did not see MPI exception on invalid call on communicator COMM_NULL\n";
    }
    return sawException ? 0 : 1;
}

int main(int argc, char *argv[])
{
    int errs = 0;
    bool periods[2] = { false, false };
    int dims[2] = { 0, 0 };

    MTest_Init();

    MPI::Compute_dims(MPI::COMM_WORLD.Get_size(), 2, dims);
    MPI::Cartcomm cart = MPI::COMM_WORLD.Create_cart(2, dims, periods, true);
    cart.Set_name("Cart comm");
    // Graphcomm graph = COMM_WORLD.Create_graph();

    errs += testCommCall(MPI::COMM_WORLD);
    errs += testNullCommCall();
    errs += testCommCall(MPI::COMM_SELF);
    errs += testCommCall(cart);
    //errs += testCommCall(graph);

    cart.Free();
    // graph.Free();

    MTest_Finalize(errs);

    return 0;
}