diff options
Diffstat (limited to 'src/include/storage/bufmgr.h')
| -rw-r--r-- | src/include/storage/bufmgr.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h index ad203621793..9ae83b4253e 100644 --- a/src/include/storage/bufmgr.h +++ b/src/include/storage/bufmgr.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.103 2007/05/02 23:18:03 tgl Exp $ + * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.104 2007/05/30 20:12:03 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -19,6 +19,14 @@ typedef void *Block; +/* Possible arguments for GetAccessStrategy() */ +typedef enum BufferAccessStrategyType +{ + BAS_NORMAL, /* Normal random access */ + BAS_BULKREAD, /* Large read-only scan (hint bit updates are ok) */ + BAS_VACUUM /* VACUUM */ +} BufferAccessStrategyType; + /* in globals.c ... this duplicates miscadmin.h */ extern DLLIMPORT int NBuffers; @@ -111,6 +119,8 @@ extern DLLIMPORT int32 *LocalRefCount; * prototypes for functions in bufmgr.c */ extern Buffer ReadBuffer(Relation reln, BlockNumber blockNum); +extern Buffer ReadBufferWithStrategy(Relation reln, BlockNumber blockNum, + BufferAccessStrategy strategy); extern Buffer ReadOrZeroBuffer(Relation reln, BlockNumber blockNum); extern void ReleaseBuffer(Buffer buffer); extern void UnlockReleaseBuffer(Buffer buffer); @@ -157,6 +167,7 @@ extern void BgBufferSync(void); extern void AtProcExit_LocalBuffers(void); /* in freelist.c */ -extern void StrategyHintVacuum(bool vacuum_active); +extern BufferAccessStrategy GetAccessStrategy(BufferAccessStrategyType btype); +extern void FreeAccessStrategy(BufferAccessStrategy strategy); #endif |