Move NetworkMonitor to NetworkStack

Bug: b/112869080
Test: atest FrameworksNetTests NetworkStackTests
Change-Id: I1b8b6a3f4390adbabf92fb9e48da61c47b08b2ec

1 files changed, 83 insertions, 0 deletions

diff --git a/src/android/net/util/Stopwatch.java b/src/android/net/util/Stopwatch.java
new file mode 100644
index 0000000..c316699
--- /dev/null
+++ b/src/android/net/util/Stopwatch.java
@@ -0,0 +1,83 @@
+/*
+ * 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.
+ */
+
+package android.net.util;
+
+import android.os.SystemClock;
+
+
+/**
+ * @hide
+ */
+public class Stopwatch {
+    private long mStartTimeMs;
+    private long mStopTimeMs;
+
+    public boolean isStarted() {
+        return (mStartTimeMs > 0);
+    }
+
+    public boolean isStopped() {
+        return (mStopTimeMs > 0);
+    }
+
+    public boolean isRunning() {
+        return (isStarted() && !isStopped());
+    }
+
+    /**
+     * Start the Stopwatch.
+     */
+    public Stopwatch start() {
+        if (!isStarted()) {
+            mStartTimeMs = SystemClock.elapsedRealtime();
+        }
+        return this;
+    }
+
+    /**
+     * Stop the Stopwatch.
+     * @return the total time recorded, in milliseconds, or 0 if not started.
+     */
+    public long stop() {
+        if (isRunning()) {
+            mStopTimeMs = SystemClock.elapsedRealtime();
+        }
+        // Return either the delta after having stopped, or 0.
+        return (mStopTimeMs - mStartTimeMs);
+    }
+
+    /**
+     * Return the total time recorded to date, in milliseconds.
+     * If the Stopwatch is not running, returns the same value as stop(),
+     * i.e. either the total time recorded before stopping or 0.
+     */
+    public long lap() {
+        if (isRunning()) {
+            return (SystemClock.elapsedRealtime() - mStartTimeMs);
+        } else {
+            return stop();
+        }
+    }
+
+    /**
+     * Reset the Stopwatch. It will be stopped when this method returns.
+     */
+    public void reset() {
+        mStartTimeMs = 0;
+        mStopTimeMs = 0;
+    }
+}