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/*-------------------------------------------------------------------------
*
* twophase.h
* Two-phase-commit related declarations.
*
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/twophase.h
*
*-------------------------------------------------------------------------
*/
#ifndef TWOPHASE_H
#define TWOPHASE_H
#include "access/xact.h"
#include "access/xlogdefs.h"
#include "datatype/timestamp.h"
#include "storage/lock.h"
/*
* GlobalTransactionData is defined in twophase.c; other places have no
* business knowing the internal definition.
*/
typedef struct GlobalTransactionData *GlobalTransaction;
/* GUC variable */
extern __thread PGDLLIMPORT int max_prepared_xacts;
extern Size TwoPhaseShmemSize(void);
extern void TwoPhaseShmemInit(void);
extern void AtAbort_Twophase(void);
extern void PostPrepare_Twophase(void);
extern TransactionId TwoPhaseGetXidByVirtualXID(VirtualTransactionId vxid,
bool *have_more);
extern PGPROC *TwoPhaseGetDummyProc(TransactionId xid, bool lock_held);
extern BackendId TwoPhaseGetDummyBackendId(TransactionId xid, bool lock_held);
extern GlobalTransaction MarkAsPreparing(TransactionId xid, const char *gid,
TimestampTz prepared_at,
Oid owner, Oid databaseid);
extern void StartPrepare(GlobalTransaction gxact);
extern void EndPrepare(GlobalTransaction gxact);
extern bool StandbyTransactionIdIsPrepared(TransactionId xid);
extern TransactionId PrescanPreparedTransactions(TransactionId **xids_p,
int *nxids_p);
extern void StandbyRecoverPreparedTransactions(void);
extern void RecoverPreparedTransactions(void);
extern void CheckPointTwoPhase(XLogRecPtr redo_horizon);
extern void FinishPreparedTransaction(const char *gid, bool isCommit);
extern void PrepareRedoAdd(char *buf, XLogRecPtr start_lsn,
XLogRecPtr end_lsn, RepOriginId origin_id);
extern void PrepareRedoRemove(TransactionId xid, bool giveWarning);
extern void restoreTwoPhaseData(void);
extern bool LookupGXact(const char *gid, XLogRecPtr prepare_end_lsn,
TimestampTz origin_prepare_timestamp);
#endif /* TWOPHASE_H */
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