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# Definitions for the VMS/IIS device driver.
define IIS_READ 1 # read function code
define IIS_WRITE 0 # write function code
define IIS_INACTIVE 2 # no i/o in progress
define EFN EFN2 # EFN to use for i/o
define EFN1W 0 # efn #1, wait for completion
define EFN2 1 # efn #2, no wait for completion
define EFN3 2 # efn #3, no wait for completion
# Function control block structure for IIS. The first part of the structure
# is filled in by VMS at open time; all we need to know is the offset of the
# device name. We use the latter part of the buffer for our own internal
# variables.
define LEN_FCB 28
define FCB_U_NAME Mems[($1)+16+($2)-1]
define FCB_IOSB Mems[($1)+20+($2)-1]
define FCB_KCHAN Mems[($1)+24] # NULL if on local node, else remote
define FCB_STATUS Mems[($1)+25] # channel status (r, w, err)
define FCB_NBYTES Mems[($1)+26] # nbytes last transfer
define FCB_EFN Mems[($1)+27] # event flag used for transfer
# IIS device status words.
define IIS_FILSIZE (512 * 512 * SZB_CHAR)
define IIS_BLKSIZE 1024
define IIS_OPTBUFSIZE (512 * SZB_CHAR)
define IIS_MAXBUFSIZE 32768
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