-- VMMgr>Projection.mesa (last edited by Knutsen on February 25, 1980 3:49 PM)

DIRECTORY

CachedRegion: FROM "CachedRegion" USING [Desc],

VM: FROM "VM" USING [PageNumber];

Projection: DEFINITIONS =

BEGIN

DeleteSwapUnits: PROCEDURE [pageMember: VM.PageNumber];

-- Set region to hasSwapUnits=FALSE.

-- NOTE: modifies projection file only, does not update region cache; thus, the region desc must be flushed from the cache first.

ForceOut: PROCEDURE [pageMember: VM.PageNumber];

-- If descriptor for projection region containing pageMember is cached and dirty, clean it.

Get: PROCEDURE [pageMember: VM.PageNumber] RETURNS [CachedRegion.Desc];

-- Returns descriptor for projection region containing pageMember. Also, inserts it in the region cache.

Merge: PROCEDURE [pageNext: VM.PageNumber];

-- Removes the projection region boundary at pageNext.

-- NOTE: modifies projection file only, does not update region cache; thus, the region desc must be flushed from the cache first.

Split: PROCEDURE [pageNext: VM.PageNumber];

-- If there is not already a projection region boundary at pageNext, make one.

-- NOTE: modifies projection file only, does not update region cache; thus, the region desc must be flushed from the cache first.

Touch: PROCEDURE [pageMember: VM.PageNumber];

-- Ensure descriptor for projection region containing pageMember is cached

TranslateLevel: PROCEDURE [pageMember: VM.PageNumber, delta: INTEGER];

-- Add (signed) delta to level field of descriptor for region containing pageMember.

-- NOTE: modifies projection file only, does not update region cache; thus, the region desc must be flushed from the cache first.

END.

LOG

Time: Sometime in April 1978By: McJonesAction: Created file

Time: June 24, 1978 5:26 PMBy: McJonesAction: PageNumber moved to VM

Time: September 28, 1979 3:50 PMBy: KnutsenAction: Added documentation.

Time: February 25, 1980 3:50 PMBy: KnutsenAction: Added DeleteSwapUnits.