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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "mpi.h"
#include "mpitest.h"
int main(int argc, char **argv)
{
int size, rank, msg, cancelled;
MPI_Request request;
MPI_Status status;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (size != 2) {
fprintf(stderr, "ERROR: must be run with 2 processes");
MPI_Abort(MPI_COMM_WORLD, 1);
}
if (rank == 0) {
msg = -1;
/* Post, then cancel MPI_ANY_SOURCE recv */
MPI_Irecv(&msg, 1, MPI_INT, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &request);
MPI_Cancel(&request);
MPI_Wait(&request, &status);
MPI_Test_cancelled(&status, &cancelled);
assert(cancelled);
MPI_Barrier(MPI_COMM_WORLD);
MPI_Irecv(&msg, 1, MPI_INT, MPI_ANY_SOURCE, 0, MPI_COMM_WORLD, &request);
MPI_Wait(&request, &status);
assert(msg == 42);
} else {
MPI_Barrier(MPI_COMM_WORLD);
msg = 42;
MPI_Send(&msg, 1, MPI_INT, 0, 0, MPI_COMM_WORLD);
}
MTest_Finalize(0);
}
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