openmpi/ompi/mpi/c/waitsome.c

/* -*- Mode: C; c-basic-offset:4 ; -*- */

/*
 * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
 *                         University Research and Technology
 *                         Corporation.  All rights reserved.
 * Copyright (c) 2004-2006 The University of Tennessee and The University
 *                         of Tennessee Research Foundation.  All rights
 *                         reserved.
 * Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
 *                         University of Stuttgart.  All rights reserved.
 * Copyright (c) 2004-2005 The Regents of the University of California.
 *                         All rights reserved.
 * $COPYRIGHT$
 * 
 * Additional copyrights may follow
 * 
 * $HEADER$
 */
#include "ompi_config.h"
#include <stdio.h>

#include "ompi/mpi/c/bindings.h"
#include "ompi/mca/pml/pml.h"
#include "ompi/request/request.h"

#if OMPI_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Waitsome = PMPI_Waitsome
#endif

#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif

static const char FUNC_NAME[] = "MPI_Waitsome";


int MPI_Waitsome(int incount, MPI_Request *requests,
                 int *outcount, int *indices,
                 MPI_Status *statuses) 
{
    int index, rc;
    MPI_Status *pstatus;

    if ( MPI_PARAM_CHECK ) {
        int rc = MPI_SUCCESS;
        OMPI_ERR_INIT_FINALIZE(FUNC_NAME);
        if( (requests == NULL) && (0 != incount) ) {
            rc = MPI_ERR_REQUEST;
        }
        OMPI_ERRHANDLER_CHECK(rc, MPI_COMM_WORLD, rc, FUNC_NAME);
    }

    if( MPI_STATUSES_IGNORE != statuses ) {
        pstatus = statuses;
    } else {
        pstatus = MPI_STATUS_IGNORE;
    }
    /* optimize this in the future */
    rc = ompi_request_wait_any( incount, requests, &index, pstatus );
    if( MPI_UNDEFINED == index ) {
       *outcount = MPI_UNDEFINED;
    } else {
       *outcount = 1;
       indices[0] = index;
    }
    OMPI_ERRHANDLER_RETURN(rc, MPI_COMM_WORLD, rc, FUNC_NAME);
}