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postgres/src/include/utils/snapmgr.h

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Separate snapshot management code from tuple visibility code, create a snapmgmt.c file for the former. The header files have also been reorganized in three parts: the most basic snapshot definitions are now in a new file snapshot.h, and the also new snapmgmt.h keeps the definitions for snapmgmt.c. tqual.h has been reduced to the bare minimum. This patch is just a first step towards managing live snapshots within a transaction; there is no functionality change. Per my proposal to pgsql-patches on 20080318191940.GB27458@alvh.no-ip.org and subsequent discussion.
18 years ago
/*-------------------------------------------------------------------------
*
Rename snapmgmt.c/h to snapmgr.c/h, for consistency with other files. Per complaint from Tom Lane.
18 years ago
* snapmgr.h
* POSTGRES snapshot manager
Separate snapshot management code from tuple visibility code, create a snapmgmt.c file for the former. The header files have also been reorganized in three parts: the most basic snapshot definitions are now in a new file snapshot.h, and the also new snapmgmt.h keeps the definitions for snapmgmt.c. tqual.h has been reduced to the bare minimum. This patch is just a first step towards managing live snapshots within a transaction; there is no functionality change. Per my proposal to pgsql-patches on 20080318191940.GB27458@alvh.no-ip.org and subsequent discussion.
18 years ago
*
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
Rename snapmgmt.c/h to snapmgr.c/h, for consistency with other files. Per complaint from Tom Lane.
18 years ago
* $PostgreSQL: pgsql/src/include/utils/snapmgr.h,v 1.1 2008/03/26 18:48:59 alvherre Exp $
Separate snapshot management code from tuple visibility code, create a snapmgmt.c file for the former. The header files have also been reorganized in three parts: the most basic snapshot definitions are now in a new file snapshot.h, and the also new snapmgmt.h keeps the definitions for snapmgmt.c. tqual.h has been reduced to the bare minimum. This patch is just a first step towards managing live snapshots within a transaction; there is no functionality change. Per my proposal to pgsql-patches on 20080318191940.GB27458@alvh.no-ip.org and subsequent discussion.
18 years ago
*
*-------------------------------------------------------------------------
*/
Rename snapmgmt.c/h to snapmgr.c/h, for consistency with other files. Per complaint from Tom Lane.
18 years ago
#ifndef SNAPMGR_H
#define SNAPMGR_H
Separate snapshot management code from tuple visibility code, create a snapmgmt.c file for the former. The header files have also been reorganized in three parts: the most basic snapshot definitions are now in a new file snapshot.h, and the also new snapmgmt.h keeps the definitions for snapmgmt.c. tqual.h has been reduced to the bare minimum. This patch is just a first step towards managing live snapshots within a transaction; there is no functionality change. Per my proposal to pgsql-patches on 20080318191940.GB27458@alvh.no-ip.org and subsequent discussion.
18 years ago
#include "utils/snapshot.h"
extern PGDLLIMPORT Snapshot SerializableSnapshot;
extern PGDLLIMPORT Snapshot LatestSnapshot;
extern PGDLLIMPORT Snapshot ActiveSnapshot;
extern TransactionId TransactionXmin;
extern TransactionId RecentXmin;
extern TransactionId RecentGlobalXmin;
extern Snapshot GetTransactionSnapshot(void);
extern Snapshot GetLatestSnapshot(void);
extern Snapshot CopySnapshot(Snapshot snapshot);
extern void FreeSnapshot(Snapshot snapshot);
extern void FreeXactSnapshot(void);
Rename snapmgmt.c/h to snapmgr.c/h, for consistency with other files. Per complaint from Tom Lane.
18 years ago
#endif /* SNAPMGR_H */