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redo/undo support functions and cleanups.

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This commit is contained in:
Vadim B. Mikheev
2000-10-20 11:01:21 +00:00
parent e18a862d46
commit b58c0411ba
15 changed files with 726 additions and 167 deletions
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107
src/backend/access/transam/xact.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.72 2000/10/11 21:28:17 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.73 2000/10/20 11:01:04 vadim Exp $
*
* NOTES
* Transaction aborts can now occur two ways:
@ -154,6 +154,8 @@
*/
#include "postgres.h"
#include <sys/time.h>
#include "access/nbtree.h"
#include "catalog/heap.h"
#include "catalog/index.h"
@ -215,6 +217,19 @@ TransactionState CurrentTransactionState = &CurrentTransactionStateData;
int DefaultXactIsoLevel = XACT_READ_COMMITTED;
int XactIsoLevel;
#ifdef XLOG
#include "access/xlogutils.h"
int CommitDelay;
void xact_redo(XLogRecPtr lsn, XLogRecord *record);
void xact_undo(XLogRecPtr lsn, XLogRecord *record);
static void (*_RollbackFunc)(void*) = NULL;
static void *_RollbackData = NULL;
#endif
/* ----------------
* info returned when the system is disabled
*
@ -676,6 +691,28 @@ RecordTransactionCommit()
*/
TransactionIdCommit(xid);
#ifdef XLOG
{
xl_xact_commit xlrec;
struct timeval delay;
XLogRecPtr recptr;
xlrec.xtime = time(NULL);
/*
* MUST SAVE ARRAY OF RELFILENODE-s TO DROP
*/
recptr = XLogInsert(RM_XACT_ID, XLOG_XACT_COMMIT,
(char*) &xlrec, SizeOfXactCommit, NULL, 0);
/*
* Sleep before commit! So we can flush more than one
* commit records per single fsync.
*/
delay.tv_sec = 0;
delay.tv_usec = CommitDelay;
(void) select(0, NULL, NULL, NULL, &delay);
}
#endif
/*
* Now write the log info to the disk too.
*/
@ -785,6 +822,18 @@ RecordTransactionAbort()
if (SharedBufferChanged && !TransactionIdDidCommit(xid))
TransactionIdAbort(xid);
#ifdef XLOG
if (SharedBufferChanged)
{
xl_xact_abort xlrec;
XLogRecPtr recptr;
xlrec.xtime = time(NULL);
recptr = XLogInsert(RM_XACT_ID, XLOG_XACT_ABORT,
(char*) &xlrec, SizeOfXactAbort, NULL, 0);
}
#endif
/*
* Tell bufmgr and smgr to release resources.
*/
@ -1123,10 +1172,13 @@ AbortTransaction()
AtEOXact_SPI();
AtEOXact_nbtree();
AtAbort_Cache();
AtAbort_Locks();
AtAbort_Memory();
AtEOXact_Files();
/* Here we'll rollback xaction changes */
AtAbort_Locks();
SharedBufferChanged = false; /* safest place to do it */
/* ----------------
@ -1663,3 +1715,54 @@ IsTransactionBlock()
return false;
}
#ifdef XLOG
void
xact_redo(XLogRecPtr lsn, XLogRecord *record)
{
uint8 info = record->xl_info & ~XLR_INFO_MASK;
if (info == XLOG_XACT_COMMIT)
{
xl_xact_commit *xlrec = (xl_xact_commit*) XLogRecGetData(record);
XLogMarkCommitted(record->xl_xid);
/* MUST REMOVE FILES OF ALL DROPPED RELATIONS */
}
else if (info == XLOG_XACT_ABORT)
{
XLogMarkAborted(record->xl_xid);
}
else
elog(STOP, "xact_redo: unknown op code %u", info);
}
void
xact_undo(XLogRecPtr lsn, XLogRecord *record)
{
uint8 info = record->xl_info & ~XLR_INFO_MASK;
if (info == XLOG_XACT_COMMIT) /* shouldn't be called by XLOG */
elog(STOP, "xact_undo: can't undo committed xaction");
else if (info != XLOG_XACT_ABORT)
elog(STOP, "xact_redo: unknown op code %u", info);
}
void
XactPushRollback(void (*func) (void *), void* data)
{
if (_RollbackFunc != NULL)
elog(STOP, "XactPushRollback: already installed");
_RollbackFunc = func;
_RollbackData = data;
}
void
XactPopRollback(void)
{
_RollbackFunc = NULL;
}
#endif