/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *  (C) 2005 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include <stdio.h>
#include "mpi.h"
#include "mpitest.h"

/* 
 * This program checks that the various MPI_Test and MPI_Wait routines 
 * allow both null requests and in the multiple completion cases, empty
 * lists of requests.
 */

int main(int argc, char **argv)
{
    int errs = 0;
    MPI_Status status, *status_array = 0;
    int count = 0, flag, idx, rc, errlen, *indices=0, outcnt;
    MPI_Request *reqs = 0;
    char errmsg[MPI_MAX_ERROR_STRING];

    MTest_Init(&argc, &argv);

    MPI_Comm_set_errhandler( MPI_COMM_WORLD, MPI_ERRORS_RETURN );

    rc = MPI_Testall( count, reqs, &flag, status_array );
    if (rc != MPI_SUCCESS) {
	MPI_Error_string( rc, errmsg, &errlen );
	printf( "MPI_Testall returned failure: %s\n", errmsg );
	errs ++;
    }
    else if (!flag) {
	printf( "MPI_Testall( 0, ... ) did not return a true flag\n") ;
	errs++;
    }

    rc = MPI_Waitall( count, reqs, status_array );
    if (rc != MPI_SUCCESS) {
	MPI_Error_string( rc, errmsg, &errlen );
	printf( "MPI_Waitall returned failure: %s\n", errmsg );
	errs ++;
    }

    rc = MPI_Testany( count, reqs, &idx, &flag, &status );
    if (rc != MPI_SUCCESS) {
	MPI_Error_string( rc, errmsg, &errlen );
	printf( "MPI_Testany returned failure: %s\n", errmsg );
	errs ++;
    }
    else if (!flag) {
	printf( "MPI_Testany( 0, ... ) did not return a true flag\n") ;
	errs++;
    }

    rc = MPI_Waitany( count, reqs, &idx, &status );
    if (rc != MPI_SUCCESS) {
	MPI_Error_string( rc, errmsg, &errlen );
	printf( "MPI_Waitany returned failure: %s\n", errmsg );
	errs ++;
    }

    rc = MPI_Testsome( count, reqs, &outcnt, indices, status_array );
    if (rc != MPI_SUCCESS) {
	MPI_Error_string( rc, errmsg, &errlen );
	printf( "MPI_Testsome returned failure: %s\n", errmsg );
	errs ++;
    }

    rc = MPI_Waitsome( count, reqs, &outcnt, indices, status_array );
    if (rc != MPI_SUCCESS) {
	MPI_Error_string( rc, errmsg, &errlen );
	printf( "MPI_Waitsome returned failure: %s\n", errmsg );
	errs ++;
    }
    
    MTest_Finalize( errs );
    MPI_Finalize();
    return 0;
}
