Home Research Papers Posters Manuals Talks Download People Help Internal

libs/ck-libs/ampi/romio/adio/ad_ntfs/ad_ntfs_wait.c

Go to the documentation of this file.

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/* 
 *   $Id$    
 *
 *   Copyright (C) 1997 University of Chicago. 
 *   See COPYRIGHT notice in top-level directory.
 */

#include "ad_ntfs.h"

void ADIOI_NTFS_ReadComplete(ADIO_Request *request, ADIO_Status *status, int *error_code)  
{
#ifndef PRINT_ERR_MSG
    static char myname[] = "ADIOI_NTFS_READCOMPLETE";
#endif
        DWORD ret_val;

    if (*request == ADIO_REQUEST_NULL) {
        *error_code = MPI_SUCCESS;
        return;
    }
    
    if ((*request)->queued) {
                ret_val = GetOverlappedResult((*request)->fd, (*request)->handle, &(*request)->nbytes, TRUE);

                /*
                // Is this a busy wait on the aio handle?
        do {
            err = aio_suspend((const aiocb_t **) &((*request)->handle), 1, 0);
        } while ((err == -1) && (errno == EINTR));
        //*/

                if (!ret_val)
                        (*request)->nbytes = -1;

#ifdef PRINT_ERR_MSG
        *error_code = (ret_val == FALSE) ? MPI_ERR_UNKNOWN : MPI_SUCCESS;
#else
        if (ret_val == FALSE) {
            *error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ADIO_ERROR,
                            myname, "I/O Error", "%s", strerror(errno));
            ADIOI_Error((*request)->fd, *error_code, myname);       
        }
        else *error_code = MPI_SUCCESS;
#endif
    }
    else *error_code = MPI_SUCCESS;
#ifdef HAVE_STATUS_SET_BYTES
    if ((*request)->nbytes != -1)
        MPIR_Status_set_bytes(status, (*request)->datatype, (*request)->nbytes);
#endif

    if ((*request)->queued != -1) {

        /* queued = -1 is an internal hack used when the request must
           be completed, but the request object should not be
           freed. This is used in ADIOI_Complete_async, because the user
           will call MPI_Wait later, which would require status to
           be filled. Ugly but works. queued = -1 should be used only
           in ADIOI_Complete_async. 
           This should not affect the user in any way. */

        /* if request is still queued in the system, it is also there
           on ADIOI_Async_list. Delete it from there. */
        if ((*request)->queued) ADIOI_Del_req_from_list(request);

        (*request)->fd->async_count--;
        if ((*request)->handle)
        {
                CloseHandle(((OVERLAPPED*)((*request)->handle))->hEvent);
                ADIOI_Free((*request)->handle);
        }
        ADIOI_Free_request((ADIOI_Req_node *) (*request));
        *request = ADIO_REQUEST_NULL;
    }

}


void ADIOI_NTFS_WriteComplete(ADIO_Request *request, ADIO_Status *status, int *error_code)  
{
    ADIOI_NTFS_ReadComplete(request, status, error_code);
}

---