mmlr + bonefish:

Add ObjectCache::ObjectAtIndex().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43086 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/system/kernel/slab/ObjectCache.cpp

@@ -141,7 +141,7 @@ ObjectCache::InitSlab(slab* slab, void* pages, size_t byteCount, uint32 flags)
 
 	CREATE_PARANOIA_CHECK_SET(slab, "slab");
 
-	
+
 	for (size_t i = 0; i < slab->size; i++) {
 		status_t status = B_OK;
 		if (constructor)
@@ -245,6 +245,13 @@ ObjectCache::ReturnObjectToSlab(slab* source, void* object, uint32 flags)
 }
 
 
+void*
+ObjectCache::ObjectAtIndex(slab* source, int32 index) const
+{
+	return (uint8*)source->pages + source->offset + index * object_size;
+}
+
+
 #if PARANOID_KERNEL_FREE
 
 bool

src/system/kernel/slab/ObjectCache.h

@@ -106,6 +106,7 @@ public:
 
 			void				ReturnObjectToSlab(slab* source, void* object,
 									uint32 flags);
+			void*				ObjectAtIndex(slab* source, int32 index) const;
 
 			bool				Lock()	{ return mutex_lock(&lock) == B_OK; }
 			void				Unlock()	{ mutex_unlock(&lock); }