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Implement LockBufferForCleanup(), which will allow concurrent VACUUM

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to wait until it's safe to remove tuples and compact free space in a
shared buffer page.  Miscellaneous small code cleanups in bufmgr, too.
This commit is contained in:
Tom Lane
2001-07-06 21:04:26 +00:00
parent 1e9e5defc2
commit 55432fedd2
11 changed files with 418 additions and 254 deletions
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9
src/include/storage/bufmgr.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: bufmgr.h,v 1.53 2001/06/29 21:08:25 tgl Exp $
* $Id: bufmgr.h,v 1.54 2001/07/06 21:04:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -167,7 +167,7 @@ extern void InitBufferPoolAccess(void);
extern void PrintBufferUsage(FILE *statfp);
extern void ResetBufferUsage(void);
extern void ResetBufferPool(bool isCommit);
extern int BufferPoolCheckLeak(void);
extern bool BufferPoolCheckLeak(void);
extern void FlushBufferPool(void);
extern BlockNumber BufferGetBlockNumber(Buffer buffer);
extern BlockNumber RelationGetNumberOfBlocks(Relation relation);
@@ -183,10 +183,9 @@ extern void SetBufferCommitInfoNeedsSave(Buffer buffer);
extern void UnlockBuffers(void);
extern void LockBuffer(Buffer buffer, int mode);
extern void AbortBufferIO(void);
extern void LockBufferForCleanup(Buffer buffer);
extern bool BufferIsUpdatable(Buffer buffer);
extern void MarkBufferForCleanup(Buffer buffer, void (*CleanupFunc) (Buffer));
extern void AbortBufferIO(void);
extern void BufmgrCommit(void);
extern void BufferSync(void);