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Fix the sqlite3_unlock_notify() interface so that when the callback is NULL

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it simply cancels any outstanding callbacks. (CVS 6467)

FossilOrigin-Name: 9ccfcb760745df28b04e746355b1b6dec49a93de
This commit is contained in:
drh
2009-04-07 22:06:57 +00:00
parent 695c0266b7
commit 65a73bad9e
5 changed files with 82 additions and 19 deletions
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9
src/sqliteInt.h
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@@ -11,7 +11,7 @@
*************************************************************************
** Internal interface definitions for SQLite.
**
** @(#) $Id: sqliteInt.h,v 1.852 2009/04/07 14:14:22 danielk1977 Exp $
** @(#) $Id: sqliteInt.h,v 1.853 2009/04/07 22:06:57 drh Exp $
*/
#ifndef _SQLITEINT_H_
#define _SQLITEINT_H_
@@ -836,6 +836,13 @@ struct sqlite3 {
#ifdef SQLITE_ENABLE_UNLOCK_NOTIFY
/* The following variables are all protected by the STATIC_MASTER
** mutex, not by sqlite3.mutex. They are used by code in notify.c.
**
** When X.pUnlockConnection==Y, that means that X is waiting for Y to
** unlock so that it can proceed.
**
** When X.pBlockingConnection==Y, that means that something that X tried
** tried to do recently failed with an SQLITE_LOCKED error due to locks
** held by Y.
*/
sqlite3 *pBlockingConnection; /* Connection that caused SQLITE_LOCKED */
sqlite3 *pUnlockConnection; /* Connection to watch for unlock */