Include RE2 library

third_party/re2/util/benchmark.h

+// Copyright 2009 The RE2 Authors.  All Rights Reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef RE2_UTIL_BENCHMARK_H__
+#define RE2_UTIL_BENCHMARK_H__
+
+namespace testing {
+struct Benchmark {
+  const char* name;
+  void (*fn)(int);
+  void (*fnr)(int, int);
+  int lo;
+  int hi;
+  int threadlo;
+  int threadhi;
+  
+  void Register();
+  Benchmark(const char* name, void (*f)(int)) { Clear(name); fn = f; Register(); }
+  Benchmark(const char* name, void (*f)(int, int), int l, int h) { Clear(name); fnr = f; lo = l; hi = h; Register(); }
+  void Clear(const char* n) { name = n; fn = 0; fnr = 0; lo = 0; hi = 0; threadlo = 0; threadhi = 0; }
+  Benchmark* ThreadRange(int lo, int hi) { threadlo = lo; threadhi = hi; return this; }
+};
+}  // namespace testing
+
+void SetBenchmarkBytesProcessed(long long);
+void StopBenchmarkTiming();
+void StartBenchmarkTiming();
+void BenchmarkMemoryUsage();
+void SetBenchmarkItemsProcessed(int);
+
+int NumCPUs();
+
+#define BENCHMARK(f) \
+        ::testing::Benchmark* _benchmark_##f = (new ::testing::Benchmark(#f, f))
+
+#define BENCHMARK_RANGE(f, lo, hi) \
+        ::testing::Benchmark* _benchmark_##f = \
+        (new ::testing::Benchmark(#f, f, lo, hi))
+
+#endif  // RE2_UTIL_BENCHMARK_H__