Add the ability to run each test in isolation.
This adds a new gtest main that will run each test in its own forked
process. This can avoid problems where some tests do not clean up after
themselves, or a test modifies global state that can change the behavior
of another test.
This is only supported on device and linux.
Test: Passes extensive unit tests.
Change-Id: Iab29bf60b9f5cd9c1af67e85f502ada7efe24b18
diff --git a/NanoTime.h b/NanoTime.h
new file mode 100644
index 0000000..836af99
--- /dev/null
+++ b/NanoTime.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2017 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.
+ */
+
+#pragma once
+
+#include <stdint.h>
+
+namespace android {
+namespace gtest_extras {
+
+constexpr uint64_t kNsPerMs = 1000000;
+constexpr uint64_t kNsPerS = kNsPerMs * 1000;
+
+uint64_t NanoTime();
+
+} // namespace gtest_extras
+} // namespace android