-- SubVolume.mesa (last edited by: Luniewski on: February 5, 1981 9:50 AM)

DIRECTORY

DiskChannel USING [Address, CompletionHandle, Handle],

Environment USING [PageNumber],

File USING [PageCount, PageNumber],

FileInternal USING [Operation, ReadOnlyFilePtr],

Volume USING [ID],

PhysicalVolumeFormat USING [PageNumber, SubVolumeDesc],

VolumeInternal USING [PageNumber];

SubVolume: DEFINITIONS =

BEGIN

PageNumber: TYPE = LONG CARDINAL;

PageCount: TYPE = LONG CARDINAL;

Handle: TYPE = LONG POINTER TO Descriptor;

Descriptor: TYPE = RECORD[

lvID: Volume.ID,

lvPage: VolumeInternal.PageNumber,

pvPage: PhysicalVolumeFormat.PageNumber,

nPages: PageCount,

channel: DiskChannel.Handle];

Find: PROC [vID: Volume.ID, page: VolumeInternal.PageNumber] RETURNS [success: BOOLEAN, subVolume: Handle];

GetNext: PROC [inSubVolume: Handle] RETURNS [outSubVolume: Handle];

GetPageAddress: PROC [vID: Volume.ID, page: VolumeInternal.PageNumber] RETURNS [channel: DiskChannel.Handle, address: DiskChannel.Address];

OnLine: PROC [subVolume: PhysicalVolumeFormat.SubVolumeDesc, channel: DiskChannel.Handle];

OffLine: PROC [vID: Volume.ID, channel: DiskChannel.Handle];

StartIO: PROC [io: IOptr];

IOptr: TYPE = POINTER TO IO;

IO: TYPE = RECORD[ -- argument record to StartIO; lifetime = duration of call only

op: FileInternal.Operation,

subVolume: Handle,

subVolumePage: PageNumber,

memPage: Environment.PageNumber,

filePtr: FileInternal.ReadOnlyFilePtr,

filePage: File.PageNumber,

pageCount: File.PageCount,

fixedMemPage: BOOLEAN ← FALSE,

chained: BOOLEAN ← FALSE,

link: DiskChannel.Address ← NULL];

completion: READONLY DiskChannel.CompletionHandle;

END.

LOG

Time: March 1, 1979 10:50 AMBy: RedellAction: Created file from old DIsk.mesa, VolumeCache.mesa, and VolumeInternal.mesa.

Time: March 19, 1979 9:22 AMBy: RedellAction: Split Descriptor into onLine and offLine variants.

Time: July 24, 1979 3:26 PMBy: ForrestAction: Make subvolume record machine dependent. Add Subvolume Field

Time: July 27, 1979 3:37 PMBy: ForrestAction: change subvolume count field to Logical Volume Size Field

Time: August 13, 1979 4:22 PMBy: RedellAction: Added PageAddress stuff for boot chains. Removed useless LOOPHOLEs to DiskChannel types.

Time: September 19, 1979 8:36 AMBy: ForrestAction: Added GetNext; changed Offline to take disk channel.

Time: September 21, 1979 10:36 AMBy: ForrestAction: Added SetSubvolumeMarkerID and GetSubvolumeMarkerID.

Time: September 22, 1979 2:29 PMBy: ForrestAction: Took out the Subvolume marker stuff.

Time: November 26, 1979 3:00 PMBy: GobbelAction: Added count argument to StartIO.

Time: December 13, 1979 12:00 PMBy: RedellAction: Changed StartIO to take arguments in a record, including new fixedMemoryPage.

Time: January 31, 1980 7:54 PMBy: GobbelAction: Changed pageCount field of IO record to be LONG (File.PageCount).

Time: May 20, 1980 2:54 PMBy: LuniewskiAction: PhysicalVolume => PhysicalVolumeFormat.

Time: October 11, 1980 8:46 PMBy: ForrestAction: Change IO’s filePtr field to be pointer to Readonly Descriptor.

Time: February 5, 1981 9:49 AMBy: LuniewskiAction: Change IO’s filePtr field to be FileInternal.ReadOnlyFilePtr.