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- /*-------------------------------------------------------------------------
- *
- * freespace.h
- * POSTGRES free space map for quickly finding free space in relations
- *
- *
- * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * src/include/storage/freespace.h
- *
- *-------------------------------------------------------------------------
- */
- #ifndef FREESPACE_H_
- #define FREESPACE_H_
- #include "storage/block.h"
- #include "storage/relfilenode.h"
- #include "utils/relcache.h"
- /* prototypes for public functions in freespace.c */
- extern Size GetRecordedFreeSpace(Relation rel, BlockNumber heapBlk);
- extern BlockNumber GetPageWithFreeSpace(Relation rel, Size spaceNeeded);
- extern BlockNumber RecordAndGetPageWithFreeSpace(Relation rel,
- BlockNumber oldPage,
- Size oldSpaceAvail,
- Size spaceNeeded);
- extern void RecordPageWithFreeSpace(Relation rel, BlockNumber heapBlk,
- Size spaceAvail);
- extern void XLogRecordPageWithFreeSpace(RelFileNode rnode, BlockNumber heapBlk,
- Size spaceAvail);
- extern void FreeSpaceMapTruncateRel(Relation rel, BlockNumber nblocks);
- extern void FreeSpaceMapVacuum(Relation rel);
- extern void UpdateFreeSpaceMap(Relation rel,
- BlockNumber startBlkNum,
- BlockNumber endBlkNum,
- Size freespace);
- #endif /* FREESPACE_H_ */
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