Method RefCountIsOne

tensorflow/core/framework/tensor.cc:753–756

Notice that buf_ either points to a regular TensorBuffer or a SubBuffer. For the latter case, we have to make sure that the refcount is one both for the SubBuffer _and_ the underlying TensorBuffer.

// For the latter case, we have to make sure that the refcount is
// one both for the SubBuffer _and_ the underlying TensorBuffer.
bool Tensor::RefCountIsOne() const {
  return buf_ != nullptr && buf_->RefCountIsOne() &&
         buf_->root_buffer()->RefCountIsOne() && buf_->OwnsMemory();
}

// The macro CASES() expands to a switch statement conditioned on
// TYPE_ENUM. Each case expands the STMTS after a typedef for T.