diff --git a/benchmarks/benchmark/Benchmark.h b/benchmarks/benchmark/Benchmark.h
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+++ b/benchmarks/benchmark/Benchmark.h
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+/*
+ * 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.
+ */
+
+#ifndef BENCHMARKS_BENCHMARK_H_
+#define BENCHMARKS_BENCHMARK_H_
+
+#include <regex.h>
+#include <stdint.h>
+
+#include <string>
+#include <vector>
+
+namespace testing {
+
+class Benchmark {
+public:
+  Benchmark() {
+    List().push_back(this);
+  }
+  virtual ~Benchmark() {}
+
+  virtual std::string Name() = 0;
+
+  virtual void RunAll() = 0;
+
+  bool ShouldRun(std::vector<regex_t*>&);
+
+  void SetBenchmarkBytesProcessed(uint64_t bytes) { bytes_processed_ += bytes; }
+  void StopBenchmarkTiming();
+  void StartBenchmarkTiming();
+
+  // Run all of the benchmarks that have registered.
+  static bool RunAll(std::vector<regex_t*>&);
+
+  static std::vector<Benchmark*>& List();
+
+  static size_t MaxNameColumnWidth();
+
+protected:
+  virtual size_t NameColumnWidth() = 0;
+
+  uint64_t bytes_processed_;
+  uint64_t total_time_ns_;
+  uint64_t start_time_ns_;
+};
+
+template <typename T>
+class BenchmarkT : public Benchmark {
+public:
+  BenchmarkT() {}
+  virtual ~BenchmarkT() {}
+
+protected:
+  void RunWithArg(T arg);
+  virtual void RunIterations(int, T) = 0;
+  virtual std::string GetNameStr(T) = 0;
+};
+
+class BenchmarkWithoutArg : public BenchmarkT<void*> {
+public:
+  BenchmarkWithoutArg() {}
+  virtual ~BenchmarkWithoutArg() {}
+
+protected:
+  virtual void RunAll() override {
+    RunWithArg(nullptr);
+  }
+
+  virtual void RunIterations(int iters, void*) override {
+    Run(iters);
+  }
+
+  virtual void Run(int) = 0;
+
+  virtual size_t NameColumnWidth() override {
+    return Name().size();
+  }
+
+  virtual std::string GetNameStr(void *) override;
+};
+
+template<typename T>
+class BenchmarkWithArg : public BenchmarkT<T> {
+public:
+  BenchmarkWithArg() {}
+  virtual ~BenchmarkWithArg() {}
+
+  BenchmarkWithArg* Arg(T arg) {
+    args_.push_back(arg);
+    return this;
+  }
+
+protected:
+  virtual size_t NameColumnWidth() override {
+    size_t max = 0;
+    for (const auto arg : args_) {
+      max = std::max(max, GetNameStr(arg).size());
+    }
+    return max;
+  }
+
+  std::string GetNameStr(T arg) override;
+
+  virtual void RunAll() override {
+    for (T arg : args_) {
+      BenchmarkT<T>::RunWithArg(arg);
+    }
+  }
+
+  virtual void RunIterations(int iters, T arg) override {
+    Run(iters, arg);
+  }
+
+  virtual void Run(int iters, T arg) = 0;
+
+private:
+  std::vector<T> args_;
+};
+
+}  // namespace testing
+
+#define BENCHMARK_START(f, super_class) \
+  class f : public super_class { \
+  public: \
+    f() {} \
+    virtual ~f() {} \
+    virtual std::string Name() override { return #f; } \
+
+#define BENCHMARK_NO_ARG(f) \
+  BENCHMARK_START(f, ::testing::BenchmarkWithoutArg) \
+    virtual void Run(int) override; \
+  }; \
+  static ::testing::Benchmark* __benchmark_##f = new f()
+
+#define BENCHMARK_WITH_ARG(f, arg_type) \
+  BENCHMARK_START(f, ::testing::BenchmarkWithArg<arg_type>) \
+    virtual void Run(int, arg_type) override; \
+  }; \
+  static ::testing::BenchmarkWithArg<arg_type>* __benchmark_##f = (new f())
+
+#endif  // BENCHMARKS_BENCHMARK_H_