Last edited by
MBrown on October 3, 1982 5:37 pm
Hauser, March 8, 1985 10:46:22 am PST
Carl Hauser, October 4, 1985 1:32:16 pm PDT
Bob Hagmann May 2, 1988 3:17:15 pm PDT
YggLogBasicInternal:
CEDAR DEFINITIONS =
BEGIN
PageNumber: TYPE = YggEnvironment.PageNumber;
RecordID: TYPE = YggLog.RecordID;
Exported by LogCoreImpl
AdvanceChunk:
PROC []
RETURNS [version: YggLogRep.PageVersion, pagesInChunk: INT, firstPagePtr: LONG POINTER];
! YggLog.Error[logFull]
Allocate a new chunk for end of log, and return info about it.
firstPagePtr points to first word of first page of chunk, which is pagesInChunk pages.
Error[logFull] is a server crash; it does not release the log core monitor.
ForceTo:
PROC [followingRecord: RecordID];
Return when all pages preceding followingRecord have been recorded on the disk.
(This is NOT the same as LogBasic.Force, which must also ensure that if followingRecord
is the tail, then the page containing followingRecord gets cleaned up.)
OpenBasicForPut:
UNSAFE PROC [
nextPage: PageNumber, version: YggLogRep.PageVersion, nextRecord: RecordID]
RETURNS [pagesInChunk: INT, firstPagePtr: LONG POINTER];
Must be called before first call to Put, or a horrible error will occur.
CloseBasicForPut:
PROC [];
Reinitializes log core. Caller should hold tail monitor to exclude concurrent calls
to AdvanceChunk.
END.