cnv_close(3)                        CLIX                        cnv_close(3)



  NAME

    cnv_close - Closes a Convolution Filter (CNV) channel

  LIBRARY

    Intergraph Device Library (libix.a)

  SYNOPSIS

    #include <sys/xio/xerr.h>

    int cnv_close(
      int channel );

  PARAMETERS

    channel   An integer representing a channel

  DESCRIPTION

    The cnv_close() function unmaps any hardware registers associated with the
    specified Convolution Filter (CNV) channel() and closes the channel.  The
    channel must have been opened with cnv_open().

  RETURN VALUES

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

  ERRORS

    The cnv_close() function fails if one of the following is true:

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

    [CNV_CHANNEL_INVALID]
           The specified channel is beyond the maximum allowed.

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

  RELATED INFORMATION

    Functions:  cnv_open(3)

    Files:  xcnv(7)





  2/94 - Intergraph Corporation                                              1