src/include/access/twophase.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * twophase.h
   4  *        Two-phase-commit related declarations.
   5  *
   6  *
   7  * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
   8  * Portions Copyright (c) 1994, Regents of the University of California
   9  *
  10  * $PostgreSQL: pgsql/src/include/access/twophase.h,v 1.12 2009/11/23 09:58:36 heikki Exp $
  11  *
  12  *-------------------------------------------------------------------------
  13  */
  14 #ifndef TWOPHASE_H
  15 #define TWOPHASE_H
  16
  17 #include "access/xlogdefs.h"
  18 #include "storage/backendid.h"
  19 #include "storage/proc.h"
  20 #include "utils/timestamp.h"
  21
  22 /*
  23  * GlobalTransactionData is defined in twophase.c; other places have no
  24  * business knowing the internal definition.
  25  */
  26 typedef struct GlobalTransactionData *GlobalTransaction;
  27
  28 /* GUC variable */
  29 extern int      max_prepared_xacts;
  30
  31 extern Size TwoPhaseShmemSize(void);
  32 extern void TwoPhaseShmemInit(void);
  33
  34 extern PGPROC *TwoPhaseGetDummyProc(TransactionId xid);
  35 extern BackendId TwoPhaseGetDummyBackendId(TransactionId xid);
  36
  37 extern GlobalTransaction MarkAsPreparing(TransactionId xid, const char *gid,
  38                                 TimestampTz prepared_at,
  39                                 Oid owner, Oid databaseid);
  40
  41 extern void StartPrepare(GlobalTransaction gxact);
  42 extern void EndPrepare(GlobalTransaction gxact);
  43
  44 extern TransactionId PrescanPreparedTransactions(void);
  45 extern void RecoverPreparedTransactions(void);
  46
  47 extern void RecreateTwoPhaseFile(TransactionId xid, void *content, int len);
  48 extern void RemoveTwoPhaseFile(TransactionId xid, bool giveWarning);
  49
  50 extern void CheckPointTwoPhase(XLogRecPtr redo_horizon);
  51
  52 extern void FinishPreparedTransaction(const char *gid, bool isCommit);
  53
  54 #endif   /* TWOPHASE_H */