-- PilotFileTypes.mesa (last edited by: Forrest on: October 9, 1980 1:46 PM)

-- This file is the definition of file types used by Pilot ITSELF. See FileTypes.mesa for client ranges.

DIRECTORY File USING [Type];

PilotFileTypes: DEFINITIONS =

BEGIN

PilotFileType: TYPE = CARDINAL[0..256);

tUnassigned: File.Type = [PilotFileType[0]];

-- A volume file, with type in PilotVFileType, does not appear in any volume file map; it is only accessible via pinned file and page group descriptors. File.Create will not accept types in this range.

-- A root file, with type in PilotRootFileType, has a special slot in the logical volume root page where its id is saved; there should be at most one file of a given root file type on a logical volume. If new root types are to be added, space must be found in the logical volume root page.

-- Not all root file types are volume file types, and vice versa.

-- Beginning of volume file types (which are not root file types):

PilotVFileType: TYPE = PilotFileType[1..8];

tPhysicalVolumeRootPage: File.Type = [PilotVFileType[1]];

tBadPageList: File.Type = [PilotVFileType[2]];

tBadPage: File.Type = [PilotVFileType[3]];

tSubVolumeMarkerPage: File.Type = [PilotVFileType[4]];

tLogicalVolumeRootPage: File.Type = [PilotVFileType[5]];

-- Beginning of types which are both volume files and root files :

PilotRootFileType: TYPE = PilotFileType[6..14];

tFreePage: File.Type = [PilotRootFileType[6]];

tVolumeAllocationMap: File.Type = [PilotRootFileType[7]];

tVolumeFileMap: File.Type = [PilotRootFileType[8]];

-- Beginning of root file types (which are not volume file types):

tScavengerLog: File.Type = [PilotRootFileType[9]];
-- scavenger log describing its own volume

tTempFileList: File.Type = [PilotRootFileType[10]];

tTransactionStateFile: File.Type = [PilotRootFileType[11]];

tVMBackingFile: File.Type = [PilotRootFileType[12]];

tBeingMoved: File.Type = [PilotRootFileType[13]];

tBeingReplicated: File.Type = [PilotRootFileType[14]];

-- (Additional root file types would go here.)

-- Beginning of types which are neither volume files nor root files :

tAnonymousFile: File.Type = [PilotFileType[15]];

tTransactionLog:File.Type = [PilotFileType[16]];

tScavengerLogOtherVolume: File.Type = [PilotFileType[17]];
-- scavenger log describing other than its own volume

END.

LOG

(For earlier log entries see Pilot 4.0 archive version.)

Time: May 19, 1980 3:16 PMBy: GobbelAction: Renamed tCodeFile to be tTransactionStateFile

Time: June 2, 1980 5:01 PMBy: McJonesAction: Rearranged root file types to exclude physical volume files; added tBadPageList; deleted tSpaceBTree; added tTransactionLog

Time: August 15, 1980 3:01 PMBy: McJonesAction: Deleted tBootFile

Time: October 9, 1980 1:45 PMBy: ForrestAction: Added tScavengerLogOtherVolume