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/*-------------------------------------------------------------------------
*
* xact.h--
* postgres transaction system header
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: xact.h,v 1.12 1998/02/26 04:40:32 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef XACT_H
#define XACT_H
#include <access/transam.h>
#include <utils/nabstime.h>
/* ----------------
* transaction state structure
* ----------------
*/
typedef struct TransactionStateData
{
TransactionId transactionIdData;
CommandId commandId;
CommandId scanCommandId;
AbsoluteTime startTime;
int state;
int blockState;
} TransactionStateData;
/* ----------------
* transaction states
* ----------------
*/
#define TRANS_DEFAULT 0
#define TRANS_START 1
#define TRANS_INPROGRESS 2
#define TRANS_COMMIT 3
#define TRANS_ABORT 4
#define TRANS_DISABLED 5
/* ----------------
* transaction block states
* ----------------
*/
#define TBLOCK_DEFAULT 0
#define TBLOCK_BEGIN 1
#define TBLOCK_INPROGRESS 2
#define TBLOCK_END 3
#define TBLOCK_ABORT 4
#define TBLOCK_ENDABORT 5
typedef TransactionStateData *TransactionState;
#define TransactionIdIsValid(xid) ((bool) (xid != NullTransactionId))
#define TransactionIdStore(xid, dest) \
(*((TransactionId*)dest) = (TransactionId)xid)
#define StoreInvalidTransactionId(dest) \
(*((TransactionId*)dest) = NullTransactionId)
/* ----------------
* extern definitions
* ----------------
*/
extern int TransactionFlushEnabled(void);
extern void SetTransactionFlushEnabled(bool state);
extern bool IsTransactionState(void);
extern bool IsAbortedTransactionBlockState(void);
extern void OverrideTransactionSystem(bool flag);
extern TransactionId GetCurrentTransactionId(void);
extern CommandId GetCurrentCommandId(void);
extern CommandId GetScanCommandId(void);
extern void SetScanCommandId(CommandId);
extern AbsoluteTime GetCurrentTransactionStartTime(void);
extern bool TransactionIdIsCurrentTransactionId(TransactionId xid);
extern bool CommandIdIsCurrentCommandId(CommandId cid);
extern bool CommandIdGEScanCommandId(CommandId cid);
extern void CommandCounterIncrement(void);
extern void InitializeTransactionSystem(void);
extern bool CurrentXactInProgress(void);
extern void StartTransactionCommand(void);
extern void CommitTransactionCommand(void);
extern void AbortCurrentTransaction(void);
extern void BeginTransactionBlock(void);
extern void EndTransactionBlock(void);
extern bool IsTransactionBlock(void);
extern void UserAbortTransactionBlock(void);
extern TransactionId DisabledTransactionId;
/* defined in xid.c */
extern TransactionId xidin(char *representation);
extern char *xidout(TransactionId transactionId);
extern bool xideq(TransactionId xid1, TransactionId xid2);
extern bool TransactionIdEquals(TransactionId id1, TransactionId id2);
extern bool TransactionIdIsLessThan(TransactionId id1, TransactionId id2);
extern void TransactionIdAdd(TransactionId *xid, int value);
#endif /* XACT_H */
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