/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *   Copyright (C) 2003 University of Chicago.

 *   See COPYRIGHT notice in top-level directory.

 */

#include "mpioimpl.h"

#ifdef HAVE_WEAK_SYMBOLS

#if defined(HAVE_PRAGMA_WEAK)

#pragma weak MPIO_Waitsome = PMPIO_Waitsome

#elif defined(HAVE_PRAGMA_HP_SEC_DEF)

#pragma _HP_SECONDARY_DEF PMPIO_Waitsome MPIO_Waitsome

#elif defined(HAVE_PRAGMA_CRI_DUP)

#pragma _CRI duplicate MPIO_Waitsome as PMPIO_Waitsome

/* end of weak pragmas */

#endif

/* Include mapping from MPI->PMPI */

#define MPIO_BUILD_PROFILING

#include "mpioprof.h"

#endif

/*

  This is a temporary function until we switch to using MPI-2's generalized

  requests.

*/

int MPIO_Waitsome(int count, MPIO_Request requests[], int *outcount,

                  int indices[], MPI_Status * statuses)

{

    int i, flag, err;

    ROMIO_THREAD_CS_ENTER();

    if (count == 1) {

        err = MPIO_Wait(requests, statuses);

        if (!err) {

            *outcount = 1;

            indices[0] = 0;

        }

        goto fn_exit;

    }

    /* Check for no active requests */

    for (i = 0; i < count; i++) {

        if (requests[i] != MPIO_REQUEST_NULL) {

            break;

        }

    }

    if (i == count) {

        *outcount = MPI_UNDEFINED;

        err = MPI_SUCCESS;

        goto fn_exit;

    }

    err = MPI_SUCCESS;

    *outcount = 0;

    do {

        for (i = 0; i < count; i++) {

            if (requests[i] != MPIO_REQUEST_NULL) {

                err = MPIO_Test(&requests[i], &flag, statuses);

                if (flag) {

                    if (!err) {

                        indices[0] = i;

                        indices++;

                        statuses++;

                        *outcount = *outcount + 1;

                    }

                }

            }

        }

    } while (*outcount == 0);

  fn_exit:

    ROMIO_THREAD_CS_EXIT();

    return err;

}