bzr push into mysql-6.0-falcon branch (cpowers:2815 to 2816) Bug#39350

[Christopher Powers]

 2816 Christopher Powers	2008-09-09
      Bug#39350 Falcon: Releasing deferred indexes causes crash
      
      Minor changes per code review
modified:
  storage/falcon/Transaction.cpp

 2815 Christopher Powers	2008-09-09
      Bug#39350 Falcon: Releasing deferred indexes causes crash
      
      - Transactions now bump the reference count for deferred indexes
      - Transaction::releaseDeferredIndexes(Table *) now gets exclusive lock on
syncDeferredIndexes
modified:
  storage/falcon/DeferredIndex.cpp
  storage/falcon/DeferredIndexWalker.cpp
  storage/falcon/StorageTableShare.cpp
  storage/falcon/StorageTableShare.h
  storage/falcon/Transaction.cpp
  storage/falcon/Transaction.h

=== modified file 'storage/falcon/Transaction.cpp'
--- a/storage/falcon/Transaction.cpp	2008-09-10 04:02:07 +0000
+++ b/storage/falcon/Transaction.cpp	2008-09-10 04:37:47 +0000
@@ -1501,14 +1501,8 @@ void Transaction::releaseDeferredIndexes
 	
 	for (DeferredIndex *deferredIndex; (deferredIndex = deferredIndexes);)
 		{
+		ASSERT(deferredIndex->transaction == this);
 		deferredIndexes = deferredIndex->nextInTransaction;
-
-		if (deferredIndex->transaction)
-			{
-			ASSERT(deferredIndex->transaction == this);
-			deferredIndex->detachTransaction();
-			}
-
 		deferredIndex->releaseRef();
 		deferredIndexCount--;
 		}
@@ -1524,8 +1518,7 @@ void Transaction::releaseDeferredIndexes
 		if (deferredIndex->index && (deferredIndex->index->table == table))
 			{
 			*ptr = deferredIndex->nextInTransaction;
-			if (deferredIndex->transaction)
-				deferredIndex->detachTransaction();
+			deferredIndex->detachTransaction();
 			deferredIndex->releaseRef();
 			--deferredIndexCount;
 			}