diff options
Diffstat (limited to 'src/include/storage/bufmgr.h')
| -rw-r--r-- | src/include/storage/bufmgr.h | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h index 72d4aec3979..56f584a78ba 100644 --- a/src/include/storage/bufmgr.h +++ b/src/include/storage/bufmgr.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.115 2008/08/11 11:05:11 heikki Exp $ + * $PostgreSQL: pgsql/src/include/storage/bufmgr.h,v 1.116 2008/10/31 15:05:00 heikki Exp $ * *------------------------------------------------------------------------- */ @@ -31,6 +31,14 @@ typedef enum BufferAccessStrategyType BAS_VACUUM /* VACUUM */ } BufferAccessStrategyType; +/* Possible modes for ReadBufferExtended() */ +typedef enum +{ + RBM_NORMAL, /* Normal read */ + RBM_ZERO, /* Don't read from disk, caller will initialize */ + RBM_ZERO_ON_ERROR /* Read, but return an all-zeros page on error */ +} ReadBufferMode; + /* in globals.c ... this duplicates miscadmin.h */ extern PGDLLIMPORT int NBuffers; @@ -144,13 +152,12 @@ extern PGDLLIMPORT int32 *LocalRefCount; * prototypes for functions in bufmgr.c */ extern Buffer ReadBuffer(Relation reln, BlockNumber blockNum); -extern Buffer ReadBufferWithFork(Relation reln, ForkNumber forkNum, BlockNumber blockNum); -extern Buffer ReadBufferWithStrategy(Relation reln, BlockNumber blockNum, - BufferAccessStrategy strategy); -extern Buffer ReadOrZeroBuffer(Relation reln, ForkNumber forkNum, - BlockNumber blockNum); +extern Buffer ReadBufferExtended(Relation reln, ForkNumber forkNum, + BlockNumber blockNum, ReadBufferMode mode, + BufferAccessStrategy strategy); extern Buffer ReadBufferWithoutRelcache(RelFileNode rnode, bool isTemp, - ForkNumber forkNum, BlockNumber blockNum, bool zeroPage); + ForkNumber forkNum, BlockNumber blockNum, + ReadBufferMode mode, BufferAccessStrategy strategy); extern void ReleaseBuffer(Buffer buffer); extern void UnlockReleaseBuffer(Buffer buffer); extern void MarkBufferDirty(Buffer buffer); |