Initial in-process implementation of some Mojo primitives.

mojo/public/tests/test_support.cc

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "mojo/public/tests/test_support.h"
+
+#include "base/test/perf_log.h"
+#include "base/time/time.h"
+#include "mojo/system/core_impl.h"
+
+namespace mojo {
+namespace test {
+
+TestBase::TestBase() {
+}
+
+TestBase::~TestBase() {
+}
+
+void TestBase::SetUp() {
+  if (!system::CoreImpl::Get())
+    system::CoreImpl::Init();
+}
+
+void IterateAndReportPerf(const char* test_name,
+                          base::Callback<void()> single_iteration) {
+  // TODO(vtl): These should be specifiable using command-line flags.
+  static const size_t kGranularity = 100;
+  static const double kPerftestTimeSeconds = 3.0;
+
+  const base::TimeTicks start_time = base::TimeTicks::HighResNow();
+  base::TimeTicks end_time;
+  size_t iterations = 0;
+  do {
+    for (size_t i = 0; i < kGranularity; i++)
+      single_iteration.Run();
+    iterations += kGranularity;
+
+    end_time = base::TimeTicks::HighResNow();
+  } while ((end_time - start_time).InSecondsF() < kPerftestTimeSeconds);
+
+  base::LogPerfResult(test_name,
+                      iterations / (end_time - start_time).InSecondsF(),
+                      "iterations/second");
+}
+
+}  // namespace test
+}  // namespace mojo