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