tests/benchmark.h

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdint.h>

#include <vector>

namespace testing {

class Benchmark {
 public:
  Benchmark(const char* name, void (*fn)(int)) {
    Register(name, fn, NULL);
  }

  Benchmark(const char* name, void (*fn_range)(int, int)) {
    Register(name, NULL, fn_range);
  }

  Benchmark* Arg(int x);

  const char* Name();

  bool ShouldRun(int argc, char* argv[]);
  void Run();

 private:
  const char* name_;

  void (*fn_)(int);
  void (*fn_range_)(int, int);

  std::vector<int> args_;

  void Register(const char* name, void (*fn)(int), void (*fn_range)(int, int));
  void RunRepeatedlyWithArg(int iterations, int arg);
  void RunWithArg(int arg);
};

}  // namespace testing

void SetBenchmarkBytesProcessed(int64_t);
void StopBenchmarkTiming();
void StartBenchmarkTiming();

#define BENCHMARK(f) \
    static ::testing::Benchmark* _benchmark_##f __attribute__((unused)) = \
        (new ::testing::Benchmark(#f, f))