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#pragma once

#include <cuda_runtime.h>

struct GPU_Clock
{
  GPU_Clock() {
    cudaEventCreate(&start_);
    cudaEventCreate(&stop_);
    cudaEventRecord(start_);
  }

  ~GPU_Clock() {
    cudaEventDestroy(start_);
    cudaEventDestroy(stop_);
  }

  void start() {
    cudaEventRecord(start_);
  }

  float milliseconds() {
    cudaEventRecord(stop_);
    cudaEventSynchronize(stop_);
    float time;
    cudaEventElapsedTime(&time, start_, stop_);
    return time;
  }

  float seconds() {
    return milliseconds() * float(1e-3);
  }

 private:
  cudaEvent_t start_, stop_;
};
