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Add a mechanism to let dynamically loaded modules register post-commit/

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post-abort cleanup hooks.  I'm surprised that we have not needed this
already, but I need it now to fix a plpgsql problem, and the usefulness
for other dynamically loaded modules seems obvious.
This commit is contained in:
Tom Lane
2003-09-28 23:26:20 +00:00
parent a15207f8d6
commit 8934790052
2 changed files with 82 additions and 5 deletions
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14
src/include/access/xact.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: xact.h,v 1.55 2003/08/08 21:42:32 momjian Exp $
* $Id: xact.h,v 1.56 2003/09/28 23:26:20 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -59,9 +59,13 @@ typedef enum TBlockState
TBLOCK_ENDABORT
} TBlockState;
/* ----------------
* transaction state structure
* ----------------
/*
* end-of-transaction cleanup callbacks for dynamically loaded modules
*/
typedef void (*EOXactCallback) (bool isCommit, void *arg);
/*
* transaction state structure
*/
typedef struct TransactionStateData
{
@ -130,6 +134,8 @@ extern void UserAbortTransactionBlock(void);
extern void AbortOutOfAnyTransaction(void);
extern void PreventTransactionChain(void *stmtNode, const char *stmtType);
extern void RequireTransactionChain(void *stmtNode, const char *stmtType);
extern void RegisterEOXactCallback(EOXactCallback callback, void *arg);
extern void UnregisterEOXactCallback(EOXactCallback callback, void *arg);
extern void RecordTransactionCommit(void);