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Substantial rewrite of async.c to avoid problems with non-reentrant stdio

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and possibly other problems.  Minor changes in xact.c and postgres.c's
main loop to support new handling of async NOTIFY.
This commit is contained in:
Tom Lane
1998-10-06 02:40:09 +00:00
parent e7e027a6c9
commit c77a29a14e
7 changed files with 651 additions and 517 deletions
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45
src/backend/access/transam/xact.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.23 1998/09/01 04:27:19 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/transam/xact.c,v 1.24 1998/10/06 02:39:58 tgl Exp $
*
* NOTES
* Transaction aborts can now occur two ways:
@ -901,6 +901,9 @@ CommitTransaction()
/* handle commit for large objects [ PA, 7/17/98 ] */
_lo_commit();
/* NOTIFY commit must also come before lower-level cleanup */
AtCommit_Notify();
CloseSequences();
DestroyTempRels();
AtEOXact_portals();
@ -916,10 +919,6 @@ CommitTransaction()
* ----------------
*/
s->state = TRANS_DEFAULT;
{ /* want this after commit */
if (IsNormalProcessingMode())
Async_NotifyAtCommit();
}
/*
* Let others to know about no transaction in progress - vadim
@ -967,6 +966,7 @@ AbortTransaction()
* do abort processing
* ----------------
*/
AtAbort_Notify();
CloseSequences();
AtEOXact_portals();
RecordTransactionAbort();
@ -982,17 +982,6 @@ AbortTransaction()
* ----------------
*/
s->state = TRANS_DEFAULT;
{
/*
* We need to do this in case another process notified us while we
* are in the middle of an aborted transaction. We need to notify
* our frontend after we finish the current transaction. -- jw,
* 1/3/94
*/
if (IsNormalProcessingMode())
Async_NotifyAtAbort();
}
}
/* --------------------------------
@ -1455,6 +1444,30 @@ UserAbortTransactionBlock()
s->blockState = TBLOCK_ENDABORT;
}
/* --------------------------------
* AbortOutOfAnyTransaction
*
* This routine is provided for error recovery purposes. It aborts any
* active transaction or transaction block, leaving the system in a known
* idle state.
* --------------------------------
*/
void
AbortOutOfAnyTransaction()
{
TransactionState s = CurrentTransactionState;
/*
* Get out of any low-level transaction
*/
if (s->state != TRANS_DEFAULT)
AbortTransaction();
/*
* Now reset the high-level state
*/
s->blockState = TBLOCK_DEFAULT;
}
bool
IsTransactionBlock()
{