C++ (Cpp) ADIOI_NFS_aio Examples

Example #1

File: ad_nfs_iread.c Project: ParaStation/psmpi2

/* nearly identical to ADIOI_GEN_IreadContig, except we lock around I/O */
void ADIOI_NFS_IreadContig(ADIO_File fd, void *buf, int count,
                           MPI_Datatype datatype, int file_ptr_type,
                           ADIO_Offset offset, ADIO_Request * request, int *error_code)
{
    MPI_Count len, typesize;
    int aio_errno = 0;
    static char myname[] = "ADIOI_NFS_IREADCONTIG";

    MPI_Type_size_x(datatype, &typesize);
    len = count * typesize;

    if (file_ptr_type == ADIO_INDIVIDUAL)
        offset = fd->fp_ind;
    aio_errno = ADIOI_NFS_aio(fd, buf, len, offset, 0, request);
    if (file_ptr_type == ADIO_INDIVIDUAL)
        fd->fp_ind += len;

    fd->fp_sys_posn = -1;

    if (aio_errno != 0) {
        /* --BEGIN ERROR HANDLING-- */
        MPIO_ERR_CREATE_CODE_ERRNO(myname, aio_errno, error_code);
        return;
        /* --END ERROR HANDLING-- */
    } else
        *error_code = MPI_SUCCESS;
}

Example #2

File: ad_nfs_iread.c Project: davidheryanto/sc14

void ADIOI_NFS_IreadContig(ADIO_File fd, void *buf, int count, 
                MPI_Datatype datatype, int file_ptr_type,
                ADIO_Offset offset, ADIO_Request *request, int *error_code)  
{
    int len, typesize;
#ifdef NO_AIO
    ADIO_Status status;
#else
    int err=-1;
#ifndef PRINT_ERR_MSG
    static char myname[] = "ADIOI_NFS_IREADCONTIG";
#endif
#endif

    (*request) = ADIOI_Malloc_request();
    (*request)->optype = ADIOI_READ;
    (*request)->fd = fd;
    (*request)->datatype = datatype;

    MPI_Type_size(datatype, &typesize);
    len = count * typesize;

#ifdef NO_AIO
    /* HP, FreeBSD, Linux */
    /* no support for nonblocking I/O. Use blocking I/O. */

    ADIOI_NFS_ReadContig(fd, buf, len, MPI_BYTE, file_ptr_type, offset, 
                         &status, error_code);  
    (*request)->queued = 0;
#ifdef HAVE_STATUS_SET_BYTES
    if (*error_code == MPI_SUCCESS) {
	MPI_Get_elements(&status, MPI_BYTE, &len);
	(*request)->nbytes = len;
    }
#endif

#else
    if (file_ptr_type == ADIO_INDIVIDUAL) offset = fd->fp_ind;
    err = ADIOI_NFS_aio(fd, buf, len, offset, 0, &((*request)->handle));
    if (file_ptr_type == ADIO_INDIVIDUAL) fd->fp_ind += len;

    (*request)->queued = 1;
    ADIOI_Add_req_to_list(request);

#ifdef PRINT_ERR_MSG
    *error_code = (err == -1) ? MPI_ERR_UNKNOWN : MPI_SUCCESS;
#else
    if (err == -1) {
	*error_code = MPIR_Err_setmsg(MPI_ERR_IO, MPIR_ADIO_ERROR,
			      myname, "I/O Error", "%s", strerror(errno));
	ADIOI_Error(fd, *error_code, myname);	    
    }
    else *error_code = MPI_SUCCESS;
#endif
#endif

    fd->fp_sys_posn = -1;   /* set it to null. */
    fd->async_count++;
}