Function AsGpuEvent

tensorflow/stream_executor/cuda/cuda_gpu_executor.cc:86–89

std::function<string(const string &)> g_cubinate;

static GpuEvent* AsGpuEvent(Event* event) {
  DCHECK(event != nullptr);
  return static_cast<GpuEvent*>(event->implementation());
}

// Given a platform-independent timer datatype, returns the internal CUDA
// platform implementation pointer.