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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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5
src/include/storage/sinval.h
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@@ -7,13 +7,14 @@
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: sinval.h,v 1.19 2001/06/19 19:42:16 tgl Exp $
* $Id: sinval.h,v 1.20 2001/07/06 21:04:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef SINVAL_H
#define SINVAL_H
#include "storage/backendid.h"
#include "storage/itemptr.h"
#include "storage/spin.h"
@@ -77,5 +78,7 @@ extern bool DatabaseHasActiveBackends(Oid databaseId, bool ignoreMyself);
extern bool TransactionIdIsInProgress(TransactionId xid);
extern void GetXmaxRecent(TransactionId *XmaxRecent);
extern int CountActiveBackends(void);
/* Use "struct proc", not PROC, to avoid including proc.h here */
extern struct proc *BackendIdGetProc(BackendId procId);
#endif /* SINVAL_H */