diff -r ca8a1b6995f6 -r 52e343bb8f80 memspy/Driver/Kernel/Source/MemSpyDriverObjectIx.cpp
--- a/memspy/Driver/Kernel/Source/MemSpyDriverObjectIx.cpp	Tue Aug 31 16:45:49 2010 +0300
+++ b/memspy/Driver/Kernel/Source/MemSpyDriverObjectIx.cpp	Wed Sep 01 12:37:10 2010 +0100
@@ -55,30 +55,6 @@
 	{ Kern::Fault("DOBJECT",aPanic); }
 	
 
-TBool MemSpyObjectIx::Find(DObject* aObj)
-	{
-	//Check preconditions(debug build only)
-	__ASSERT_CRITICAL;
-	__ASSERT_NO_FAST_MUTEX;
-
-	// I don't like the implementation of At() that was here before, it wasn't safe at all without HandleMutex. So I'm replacing it with a simpler
-	// version based on operator[] that only does what we need and does it safely.
-
-	TBool found = EFalse;
-	MemSpyObjectIx_HandleLookupLock();
-	const TInt count = Count();
-	for (TInt i = 0; i < count; i++)
-		{
-		if ((*this)[i] == aObj)
-			{
-			found = ETrue;
-			break;
-			}
-		}
-	MemSpyObjectIx_HandleLookupUnlock();
-	return found;
-	}
-
 #if MCL_ROBJECTIX_DUPLICATION
 
 #define asserta(x)	do { if (!(x)) { __crash(); } } while(0)
@@ -89,18 +65,17 @@
     }
 
 
-/*
 void RMemSpyObjectIx::Wait()
 	{
-	Kern::MutexWait(*HandleMutex);
+//	Kern::MutexWait(*HandleMutex);
 	} // RObjectIx::Wait
 
 
 void RMemSpyObjectIx::Signal()
 	{
-	Kern::MutexSignal(*HandleMutex);
+//	Kern::MutexSignal(*HandleMutex);
 	} // RObjectIx::Signal
-*/
+
 
 DObject* RMemSpyObjectIx::operator[](TInt aIndex)
 	{
@@ -114,19 +89,73 @@
 	} // RObjectIx::operator[]
 
 
+TInt RMemSpyObjectIx::At(DObject* aObj)
+	{
+	//Check preconditions(debug build only)
+	__ASSERT_CRITICAL;
+	__ASSERT_NO_FAST_MUTEX;
+	//__ASSERT_MUTEX(HandleMutex);
+
+	if (iState==ETerminated)
+		{
+		return KErrNotFound;
+		}
+
+	TInt h = KErrNotFound;
+	AcquireWriteLock();
+	iState = (TUint8)ESearching;		// enable monitoring of new handles
+	iModList.iMonitor.iObj = aObj;		// object to check for
+	iModList.iMonitor.iBoundary = 0;	// will change if aObj is added to a slot before this point
+	TInt pos = 0;
+	while (pos<iCount && iActiveCount)	// stop if index empty
+		{
+		TInt limit = pos + EMaxLockedIter;
+		if (limit>iCount)
+			{
+			limit = iCount;
+			}
+		while (pos<limit)
+			{
+			SSlot* slot = iSlots + pos;
+			if (Occupant(slot) == aObj)
+				{
+				// found it, finish
+				h = MakeHandle(pos, slot->iUsed.iAttr);
+				break;
+				}
+			pos++;
+			}
+		if (h>0)
+			{
+			break;	// found it, finish
+			}
+		iModList.iMonitor.iBoundary = pos;	// will change if aObj is added to a slot already checked
+		ReleaseWriteLock();	// let other threads in
+		AcquireWriteLock();
+		pos = iModList.iMonitor.iBoundary;	// next position to check
+		}
+	iState = (TUint8)ENormal;
+	ReleaseWriteLock();
+	return h;
+	} // RObjectIx::At
+
+
+
+
+
+
 #elif MCL_DOBJECTIX_DUPLICATION
 
-/*
-void DMemSpyObjectIx::Wait( DMemSpyObjectIx* aObjectIndex )
+void DMemSpyObjectIx::Wait( DMemSpyObjectIx* /*aObjectIndex*/ )
 	{
 //	Kern::MutexWait(*aObjectIndex->HandleMutex);
 	}
 
-void DMemSpyObjectIx::Signal( DMemSpyObjectIx* aObjectIndex )
+void DMemSpyObjectIx::Signal( DMemSpyObjectIx* /*aObjectIndex*/ )
 	{
 //	Kern::MutexSignal(*aObjectIndex->HandleMutex);
 	}
-*/
+
 
 /** Counts the number of times an object appears in this index.
 
@@ -208,6 +237,42 @@
 	return pS->obj;
 	}
 
+
+
+/**	Looks up an object in the index by object pointer.
+
+	Returns a handle to the object.
+
+	@param	aObj	Pointer to the object to look up.
+	
+	@return	Handle to object (always >0);
+	        KErrNotFound, if object not present in index.
+
+    @pre    Calling thread must be in a critical section.
+    @pre    No fast mutex can be held.
+	@pre	Call in a thread context.
+	@pre	DObject::HandleMutex held.
+ */
+TInt DMemSpyObjectIx::At(DObject* aObj)
+	{
+	//Check preconditions(debug build only)
+	__ASSERT_CRITICAL;
+	__ASSERT_NO_FAST_MUTEX;
+
+	if (iCount)
+		{
+		SDObjectIxRec* pS=iObjects;
+		SDObjectIxRec* pE=pS+iCount;
+		TInt i=0;
+		while(pS<pE && pS->obj!=aObj)
+			pS++, i++;
+		if (pS<pE)
+			return(makeHandle(i,pS->str.instance));
+		}
+	return KErrNotFound;
+	}
+
+
 /** Finds the object at a specific position in the index array.
 
 	@param	aIndex	Index into array.