mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-10-02 00:21:13 +02:00
123 lines
3.3 KiB
C
123 lines
3.3 KiB
C
/*-------------------------------------------------------------------------
|
|
*
|
|
* xact.h
|
|
* postgres transaction system header
|
|
*
|
|
*
|
|
* Copyright (c) 1994, Regents of the University of California
|
|
*
|
|
* $Id: xact.h,v 1.23 1999/07/16 17:07:28 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;
|
|
|
|
/*
|
|
* Xact isolation levels
|
|
*/
|
|
#define XACT_DIRTY_READ 0 /* not implemented */
|
|
#define XACT_READ_COMMITTED 1
|
|
#define XACT_REPEATABLE_READ 2 /* not implemented */
|
|
#define XACT_SERIALIZABLE 3
|
|
|
|
extern int DefaultXactIsoLevel;
|
|
extern int XactIsoLevel;
|
|
|
|
/* ----------------
|
|
* 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)
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
* TransactionIdEquals
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
#define TransactionIdEquals(id1, id2) \
|
|
( \
|
|
((bool) ((id1) == (id2))) \
|
|
)
|
|
|
|
|
|
/* ----------------
|
|
* extern definitions
|
|
* ----------------
|
|
*/
|
|
extern int TransactionFlushEnabled(void);
|
|
extern void SetTransactionFlushEnabled(bool state);
|
|
|
|
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 void AbortOutOfAnyTransaction(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 void TransactionIdAdd(TransactionId *xid, int value);
|
|
|
|
#endif /* XACT_H */
|