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libs/ck-libs/ampi/romio/mpi-io/iowaitsome.c

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

    MPIU_THREAD_CS_ENTER(ALLFUNC,);

    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:
    MPIU_THREAD_CS_EXIT(ALLFUNC,);
    return err;
}

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