Type ASSEMBLE
Source Lines : 642
Fixes Applied : 3
Most Recent Version : Tuesday, December 12, 1978
Last Fix ID : [HRC015DS]
Module
DMSALU (RELUFD)
Function
FOR A GIVEN DISK, TO RELEASE ALL TABLES KEPT IN FREE
STORAGE AND TO CLEAR APPROPRIATE INFORMATION IN THE
ACTIVE DISK TABLE.
Attributes
DISK RESIDENT
Operation
FOR THE GIVEN ACTIVE DISK TABLE, THE FOLLOWING
TABLES ARE RETURNED TO FREE STORAGE VIA DMSFRET, IF
THEY ARE CURRENTLY RESIDENT FOR A CMS DISK:
1. ALL FST HYPERBLOCK EXTENSIONS (IF ANY)
2. THE FIRST FST HYPERBLOCK IF IT WAS IN FREE STORAGE
3. MASTER FILE DIRECTORY
4. QMSK BIT-MASK
5. QQMSK TABLE IF IT WAS IN FREE STORAGE
IN CLEARING ANY OF THE ABOVE, THE APPROPRIATE
FLAG-BITS ARE ALSO CLEARED, AND ANY POINTERS POINTING
TO THE OLD TABLES.
FOR CERTAIN TABLES, DMSALU CLEARS
THEM IF THEY EXIST BUT ARE NOT IN FREE STORAGE,
NAMELY:
1. FIRST FST HYPERBLOCK IS NOT IN FREE STORAGE
2. QQMSK IF NOT IN FREE STORAGE
FOR AN O/S DISK, THE O/S FST BLOCKS (IF ANY) ARE RE-
TURNED TO FREE STORAGE VIA DMSFRET. THE OSFST POINTER
IN ALL ACTIVE O/S FCB'S IS CLEARED, THEN THE DMSROS
USAGE COUNT IS DECREMENTED AND IF THE USAGE COUNT IS
ZERO, THEN THE ADDRESS OF DMSROS IN THE NUCLEUS AREA
IS CLEARED, AND THE AREA OCCUPIED BY DMSROS IS RE-
TURNED TO FREE STORAGE VIA DMSFRET.
DMSALU ALSO CLEARS ALL INFORMATION IN THE ACTIVE DISK
TABLE FROM ADTMFDN THROUGH ADTCYL, AND SETS THE ADTMX
EXTENSION-MODE-LETER TO A BLANK.
ALSO, DMSALU
CLEARS ALL INFORMATION IN THE ACTIVE DISK TABLE FROM
ADTPQM1 TO ADTRES, AND ALSO CLEARS THE ADTFLG2
FLAG-BYTE.
DMSALU IS CALLED BY DMSARE FOR RELEASING AN ACTIVE
DISK, AND BY DMSACC AND DMSFOR TO CLEAR ALL
INFORMATION
BEFORE READING IN OR CREATING A NEW USER FILE
DIRECTORY FOR THE GIVEN DISK.
Calls to Other Routines
DMSFRET