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103 lines
3.0 KiB
C
103 lines
3.0 KiB
C
/*-------------------------------------------------------------------------
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*
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* xact.h--
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* postgres transaction system header
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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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* $Id: xact.h,v 1.11 1997/11/07 18:39:38 thomas Exp $
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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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#include <access/transam.h>
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#include <utils/nabstime.h>
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/* ----------------
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* transaction state structure
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* ----------------
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*/
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typedef struct TransactionStateData
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{
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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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} TransactionStateData;
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/* ----------------
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* transaction states
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* ----------------
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*/
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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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/* ----------------
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* transaction block states
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* ----------------
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*/
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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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typedef TransactionStateData *TransactionState;
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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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#define StoreInvalidTransactionId(dest) \
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(*((TransactionId*)dest) = NullTransactionId)
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/* ----------------
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* extern definitions
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* ----------------
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*/
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extern int TransactionFlushEnabled(void);
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extern void SetTransactionFlushEnabled(bool state);
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extern bool IsTransactionState(void);
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extern bool IsAbortedTransactionBlockState(void);
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extern void OverrideTransactionSystem(bool flag);
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extern TransactionId GetCurrentTransactionId(void);
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extern CommandId GetCurrentCommandId(void);
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extern CommandId GetScanCommandId(void);
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extern void SetScanCommandId(CommandId);
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extern AbsoluteTime GetCurrentTransactionStartTime(void);
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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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extern TransactionId DisabledTransactionId;
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/* defined in xid.c */
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extern TransactionId xidin(char *representation);
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extern char *xidout(TransactionId transactionId);
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extern bool xideq(TransactionId xid1, TransactionId xid2);
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extern bool TransactionIdEquals(TransactionId id1, TransactionId id2);
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extern bool TransactionIdIsLessThan(TransactionId id1, TransactionId id2);
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extern void TransactionIdAdd(TransactionId *xid, int value);
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#endif /* XACT_H */
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