pdi_cancel(3)                       CLIX                       pdi_cancel(3)



  NAME

    pdi_cancel - Cancels outstanding asynchronous I/O on a Processed Data
    Interface (PDI) port

  LIBRARY

    Intergraph Device Library (libix.a)

  SYNOPSIS

    #include <sys/xio/xerr.h>

    int pdi_cancel(
      int channel );

  PARAMETERS

    channel   An integer representing a Processed Data Interface port

  DESCRIPTION

    The pdi_cancel() function terminates all requests pending on the Processed
    Data Interface (PDI) port of the Image System Interface (ISI) board
    referenced by channel.  The specified channel must have been opened with
    pdi_open().

  RETURN VALUES

    Upon successful completion, a value of 0 is returned.  Otherwise, one of
    the following failure codes is returned.

  ERRORS

    The di_cancel() function will fail if one of the following is true:

    [XIO_FAILURE]
           The system does not contain the driver needed to support this
           request.

    [ISI_CHANNEL_NOT_OPEN]
           The specified channel is not open for this process.

  RELATED INFORMATION

    Functions:  pdi_open(3), pdi_read(3), pdi_write(3), pdi_ifb(3)

    Files:  xpdi(7)






  2/94 - Intergraph Corporation                                              1