Method AllocatesOpaqueHandle

tensorflow/core/framework/allocator.h:165–165

Returns true if this allocator allocates an opaque handle rather than the requested number of bytes. This method returns false for most allocators, but may be used by special-case allocators that track tensor usage. If this method returns true, AllocateRaw() should be invoked for all values of `num_bytes`, including 0. NOTE: It is the caller's responsibility to track whether an allocated object

  // destructors for complex objects, since there is no backing store for the
  // tensor in which to place their outputs.
  virtual bool AllocatesOpaqueHandle() const { return false; }

  // Returns the user-requested size of the data allocated at
  // 'ptr'.  Note that the actual buffer allocated might be larger