getgroup.c

mpi并行计算的c++代码 可用vc或gcc编译通过 可以用来搭建并行计算试验环境

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2003 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"

static char MTEST_Descrip[] = "Test of Win_get_group";

int main( int argc, char *argv[] )
{
    int errs = 0;
    int result;
    int buf[10];
    MPI_Win   win;
    MPI_Group group, wingroup;
    int minsize = 2;
    MPI_Comm      comm;

    MTest_Init( &argc, &argv );

    /* The following illustrates the use of the routines to 
       run through a selection of communicators and datatypes.
       Use subsets of these for tests that do not involve combinations 
       of communicators, datatypes, and counts of datatypes */
    while (MTestGetIntracommGeneral( &comm, minsize, 1 )) {
	if (comm == MPI_COMM_NULL) continue;

	MPI_Win_create( buf, sizeof(int) * 10, sizeof(int), 
			MPI_INFO_NULL, comm, &win );
	MPI_Win_get_group( win, &wingroup );
	MPI_Comm_group( comm, &group );
	MPI_Group_compare( group, wingroup, &result );
	if (result != MPI_IDENT) {
	    errs++;
	    fprintf( stderr, "Group returned by Win_get_group not the same as the input group\n" );
	}
	MPI_Group_free( &wingroup );
	MPI_Group_free( &group );
	MPI_Win_free( &win );
        MTestFreeComm(&comm);
    }

    MTest_Finalize( errs );
    MPI_Finalize();
    return 0;
}