1 files changed, 80 insertions, 0 deletions
diff --git a/common/src/com/android/tv/common/util/DurationTimer.java b/common/src/com/android/tv/common/util/DurationTimer.java
new file mode 100644
index 00000000..91581ad5
--- /dev/null
+++ b/common/src/com/android/tv/common/util/DurationTimer.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2015 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 com.android.tv.common.util;
+
+import android.os.SystemClock;
+import android.util.Log;
+import com.android.tv.common.BuildConfig;
+
+/** Times a duration. */
+public final class DurationTimer {
+    private static final String TAG = "DurationTimer";
+    public static final long TIME_NOT_SET = -1;
+
+    private long mStartTimeMs = TIME_NOT_SET;
+    private String mTag = TAG;
+    private boolean mLogEngOnly;
+
+    public DurationTimer() {}
+
+    public DurationTimer(String tag, boolean logEngOnly) {
+        mTag = tag;
+        mLogEngOnly = logEngOnly;
+    }
+
+    /** Returns true if the timer is running. */
+    public boolean isRunning() {
+        return mStartTimeMs != TIME_NOT_SET;
+    }
+
+    /** Start the timer. */
+    public void start() {
+        mStartTimeMs = SystemClock.elapsedRealtime();
+    }
+
+    /** Returns true if timer is started. */
+    public boolean isStarted() {
+        return mStartTimeMs != TIME_NOT_SET;
+    }
+
+    /**
+     * Returns the current duration in milliseconds or {@link #TIME_NOT_SET} if the timer is not
+     * running.
+     */
+    public long getDuration() {
+        return isRunning() ? SystemClock.elapsedRealtime() - mStartTimeMs : TIME_NOT_SET;
+    }
+
+    /**
+     * Stops the timer and resets its value to {@link #TIME_NOT_SET}.
+     *
+     * @return the current duration in milliseconds or {@link #TIME_NOT_SET} if the timer is not
+     *     running.
+     */
+    public long reset() {
+        long duration = getDuration();
+        mStartTimeMs = TIME_NOT_SET;
+        return duration;
+    }
+
+    /** Adds information and duration time to the log. */
+    public void log(String message) {
+        if (isRunning() && (!mLogEngOnly || BuildConfig.ENG)) {
+            Log.i(mTag, message + " : " + getDuration() + "ms");
+        }
+    }
+}