[Hacky prototype] Create a shared-memory high-performance reporting service.

services/blamer/heap_object_types.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef SERVICES_BLAMER_HEAP_OBJECT_TYPES_H_
+#define SERVICES_BLAMER_HEAP_OBJECT_TYPES_H_
+
+namespace blamer {
+
+// An enumeration of all object types allowed to be used with a
+// SharedMemoryHeap. Definitions of these objects are found in the heap_objects
+// directory.
+enum HeapObjectType : uint32_t {
+  // A special object type used to indicate freed memory that is to be reused.
+  FREED,
+
+  // A blame node object describes a blame node, its parents, its equivalences,
+  // etc. The collection of all blame nodes implicitly describes the entire
+  // tree.
+  BLAME_NODE,
+
+  // A blame data object houses actual aggregation of resource consumption data
+  // that can be attributed to a blame node and its associated tree.
+  BLAME_DATA,
+};
+
+}  // namespace blamer
+
+#endif  // SERVICES_BLAMER_HEAP_OBJECT_TYPES_H_