1996-08-27 23:50:29 +02:00
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/*-------------------------------------------------------------------------
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*
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1999-02-14 00:22:53 +01:00
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* xact.h
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1997-09-07 07:04:48 +02:00
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* postgres transaction system header
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1996-08-27 23:50:29 +02:00
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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1999-07-16 19:07:40 +02:00
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* $Id: xact.h,v 1.23 1999/07/16 17:07:28 momjian Exp $
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1996-08-27 23:50:29 +02:00
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef XACT_H
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#define XACT_H
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1999-07-16 01:04:24 +02:00
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#include "access/transam.h"
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1999-07-16 19:07:40 +02:00
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#include "utils/nabstime.h"
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1996-08-27 23:50:29 +02:00
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/* ----------------
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1997-09-07 07:04:48 +02:00
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* transaction state structure
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1996-08-27 23:50:29 +02:00
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* ----------------
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*/
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1997-09-07 07:04:48 +02:00
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typedef struct TransactionStateData
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{
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1998-09-01 06:40:42 +02:00
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TransactionId transactionIdData;
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CommandId commandId;
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CommandId scanCommandId;
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AbsoluteTime startTime;
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int state;
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int blockState;
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1997-09-08 23:56:23 +02:00
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} TransactionStateData;
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1996-08-27 23:50:29 +02:00
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1998-07-27 21:38:40 +02:00
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/*
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* Xact isolation levels
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*/
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1998-09-01 06:40:42 +02:00
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#define XACT_DIRTY_READ 0 /* not implemented */
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#define XACT_READ_COMMITTED 1
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#define XACT_REPEATABLE_READ 2 /* not implemented */
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1998-12-18 10:10:39 +01:00
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#define XACT_SERIALIZABLE 3
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1998-07-27 21:38:40 +02:00
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1998-12-18 10:10:39 +01:00
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extern int DefaultXactIsoLevel;
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1998-12-15 13:47:01 +01:00
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extern int XactIsoLevel;
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1996-08-27 23:50:29 +02:00
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/* ----------------
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1997-09-07 07:04:48 +02:00
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* transaction states
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1996-08-27 23:50:29 +02:00
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* ----------------
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*/
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1997-09-07 07:04:48 +02:00
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#define TRANS_DEFAULT 0
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#define TRANS_START 1
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#define TRANS_INPROGRESS 2
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#define TRANS_COMMIT 3
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#define TRANS_ABORT 4
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#define TRANS_DISABLED 5
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1996-08-27 23:50:29 +02:00
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/* ----------------
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1997-09-07 07:04:48 +02:00
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* transaction block states
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1996-08-27 23:50:29 +02:00
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* ----------------
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*/
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1997-09-07 07:04:48 +02:00
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#define TBLOCK_DEFAULT 0
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#define TBLOCK_BEGIN 1
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#define TBLOCK_INPROGRESS 2
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#define TBLOCK_END 3
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#define TBLOCK_ABORT 4
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#define TBLOCK_ENDABORT 5
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1996-08-27 23:50:29 +02:00
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typedef TransactionStateData *TransactionState;
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1997-11-02 16:27:14 +01:00
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#define TransactionIdIsValid(xid) ((bool) (xid != NullTransactionId))
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#define TransactionIdStore(xid, dest) \
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(*((TransactionId*)dest) = (TransactionId)xid)
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1998-02-26 05:46:47 +01:00
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#define StoreInvalidTransactionId(dest) \
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1997-11-02 16:27:14 +01:00
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(*((TransactionId*)dest) = NullTransactionId)
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1998-04-24 16:43:33 +02:00
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/* ----------------------------------------------------------------
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* TransactionIdEquals
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* ----------------------------------------------------------------
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*/
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#define TransactionIdEquals(id1, id2) \
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( \
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((bool) ((id1) == (id2))) \
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)
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1996-08-27 23:50:29 +02:00
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/* ----------------
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1997-09-07 07:04:48 +02:00
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* extern definitions
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1996-08-27 23:50:29 +02:00
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* ----------------
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*/
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1997-09-08 04:41:22 +02:00
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extern int TransactionFlushEnabled(void);
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extern void SetTransactionFlushEnabled(bool state);
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1996-08-27 23:50:29 +02:00
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1997-09-08 04:41:22 +02:00
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extern bool IsAbortedTransactionBlockState(void);
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extern void OverrideTransactionSystem(bool flag);
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1996-08-27 23:50:29 +02:00
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extern TransactionId GetCurrentTransactionId(void);
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extern CommandId GetCurrentCommandId(void);
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1997-08-29 11:05:25 +02:00
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extern CommandId GetScanCommandId(void);
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1997-09-08 04:41:22 +02:00
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extern void SetScanCommandId(CommandId);
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1996-08-27 23:50:29 +02:00
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extern AbsoluteTime GetCurrentTransactionStartTime(void);
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1997-09-08 04:41:22 +02:00
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extern bool TransactionIdIsCurrentTransactionId(TransactionId xid);
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extern bool CommandIdIsCurrentCommandId(CommandId cid);
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extern bool CommandIdGEScanCommandId(CommandId cid);
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extern void CommandCounterIncrement(void);
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extern void InitializeTransactionSystem(void);
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extern bool CurrentXactInProgress(void);
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extern void StartTransactionCommand(void);
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extern void CommitTransactionCommand(void);
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extern void AbortCurrentTransaction(void);
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extern void BeginTransactionBlock(void);
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extern void EndTransactionBlock(void);
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extern bool IsTransactionBlock(void);
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extern void UserAbortTransactionBlock(void);
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1998-10-06 04:40:09 +02:00
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extern void AbortOutOfAnyTransaction(void);
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1996-08-27 23:50:29 +02:00
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extern TransactionId DisabledTransactionId;
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/* defined in xid.c */
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1996-11-10 04:06:38 +01:00
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extern TransactionId xidin(char *representation);
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1997-09-08 04:41:22 +02:00
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extern char *xidout(TransactionId transactionId);
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extern bool xideq(TransactionId xid1, TransactionId xid2);
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1997-09-08 23:56:23 +02:00
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extern void TransactionIdAdd(TransactionId *xid, int value);
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1996-08-27 23:50:29 +02:00
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1998-09-01 06:40:42 +02:00
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#endif /* XACT_H */
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