[NETD-BPF#1] Move libnetdutils to frameworks/libs/net/...
libnetdutils is referenced by netd.c and TrafficController.cpp, which
are going to be mainlined. Therefore, move libnetdutils to a common
place where both mainline module and platform code (Netd) can refer to.
Bug: 202086915
Test: build; flash; cd system/netd; atest
Ignore-AOSP-First: the netd change(same topic) would not automerge from
aosp.
No-Typo-Check: Clean code move with no other changes.
BYPASS_INCLUSIVE_LANGUAGE_REASON=Clean code move with no other changes.
Change-Id: I645bfe35f6543149c9a9f894cd4158d27a481abe
diff --git a/staticlibs/netd/libnetdutils/include/netdutils/Stopwatch.h b/staticlibs/netd/libnetdutils/include/netdutils/Stopwatch.h
new file mode 100644
index 0000000..e7b4326
--- /dev/null
+++ b/staticlibs/netd/libnetdutils/include/netdutils/Stopwatch.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2016 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 NETDUTILS_STOPWATCH_H
+#define NETDUTILS_STOPWATCH_H
+
+#include <chrono>
+
+namespace android {
+namespace netdutils {
+
+class Stopwatch {
+ private:
+ using clock = std::chrono::steady_clock;
+ using time_point = std::chrono::time_point<clock>;
+
+ public:
+ Stopwatch() : mStart(clock::now()) {}
+ virtual ~Stopwatch() = default;
+
+ int64_t timeTakenUs() const { return getElapsedUs(clock::now()); }
+ int64_t getTimeAndResetUs() {
+ const auto& now = clock::now();
+ int64_t elapsed = getElapsedUs(now);
+ mStart = now;
+ return elapsed;
+ }
+
+ private:
+ time_point mStart;
+
+ int64_t getElapsedUs(const time_point& now) const {
+ return (std::chrono::duration_cast<std::chrono::microseconds>(now - mStart)).count();
+ }
+};
+
+} // namespace netdutils
+} // namespace android
+
+#endif // NETDUTILS_STOPWATCH_H