Аллокатор в OGRE

enum MemoryCategory
{
  MEMCATEGORY_GENERAL = 0,
  MEMCATEGORY_GEOMETRY = 1, 
  MEMCATEGORY_ANIMATION = 2, 
  MEMCATEGORY_SCENE_CONTROL = 3,
  MEMCATEGORY_SCENE_OBJECTS = 4,
  MEMCATEGORY_RESOURCE = 5,
  MEMCATEGORY_SCRIPTING = 6,
  MEMCATEGORY_RENDERSYS = 7,

  MEMCATEGORY_COUNT = 8
};

template <MemoryCategory Cat> 
class CategorisedAllocPolicy : public StdAllocPolicy // StdAllocPolicy - класс аллокатор
{};

typedef CategorisedAllocPolicy<MEMCATEGORY_GENERAL> GeneralAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_GEOMETRY> GeometryAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_ANIMATION> AnimationAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_SCENE_CONTROL> SceneCtlAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_SCENE_OBJECTS> SceneObjAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_RESOURCE> ResourceAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_SCRIPTING> ScriptingAllocPolicy;
typedef CategorisedAllocPolicy<MEMCATEGORY_RENDERSYS> RenderSysAllocPolicy;

// AllocatedObject - аллокатор
typedef AllocatedObject<GeneralAllocPolicy> GeneralAllocatedObject;
typedef AllocatedObject<GeometryAllocPolicy> GeometryAllocatedObject;
typedef AllocatedObject<AnimationAllocPolicy> AnimationAllocatedObject;
typedef AllocatedObject<SceneCtlAllocPolicy> SceneCtlAllocatedObject;
typedef AllocatedObject<SceneObjAllocPolicy> SceneObjAllocatedObject;
typedef AllocatedObject<ResourceAllocPolicy> ResourceAllocatedObject;
typedef AllocatedObject<ScriptingAllocPolicy> ScriptingAllocatedObject;
typedef AllocatedObject<RenderSysAllocPolicy> RenderSysAllocatedObject;