| /* |
| * Copyright (C) 2018 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.server.timedetector; |
| |
| import android.annotation.NonNull; |
| import android.app.AlarmManager; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.os.PowerManager; |
| import android.os.SystemClock; |
| import android.os.SystemProperties; |
| import android.provider.Settings; |
| import android.util.Slog; |
| |
| import java.util.Objects; |
| |
| /** |
| * The real implementation of {@link TimeDetectorStrategy.Callback} used on device. |
| */ |
| public final class TimeDetectorStrategyCallbackImpl implements TimeDetectorStrategy.Callback { |
| |
| private final static String TAG = "timedetector.TimeDetectorStrategyCallbackImpl"; |
| |
| private static final int SYSTEM_CLOCK_UPDATE_THRESHOLD_MILLIS_DEFAULT = 2 * 1000; |
| |
| /** |
| * If a newly calculated system clock time and the current system clock time differs by this or |
| * more the system clock will actually be updated. Used to prevent the system clock being set |
| * for only minor differences. |
| */ |
| private final int mSystemClockUpdateThresholdMillis; |
| |
| @NonNull private final Context mContext; |
| @NonNull private final ContentResolver mContentResolver; |
| @NonNull private final PowerManager.WakeLock mWakeLock; |
| @NonNull private final AlarmManager mAlarmManager; |
| |
| public TimeDetectorStrategyCallbackImpl(@NonNull Context context) { |
| mContext = Objects.requireNonNull(context); |
| mContentResolver = Objects.requireNonNull(context.getContentResolver()); |
| |
| PowerManager powerManager = context.getSystemService(PowerManager.class); |
| mWakeLock = Objects.requireNonNull( |
| powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG)); |
| |
| mAlarmManager = Objects.requireNonNull(context.getSystemService(AlarmManager.class)); |
| |
| mSystemClockUpdateThresholdMillis = |
| SystemProperties.getInt("ro.sys.time_detector_update_diff", |
| SYSTEM_CLOCK_UPDATE_THRESHOLD_MILLIS_DEFAULT); |
| } |
| |
| @Override |
| public int systemClockUpdateThresholdMillis() { |
| return mSystemClockUpdateThresholdMillis; |
| } |
| |
| @Override |
| public boolean isAutoTimeDetectionEnabled() { |
| try { |
| return Settings.Global.getInt(mContentResolver, Settings.Global.AUTO_TIME) != 0; |
| } catch (Settings.SettingNotFoundException snfe) { |
| return true; |
| } |
| } |
| |
| @Override |
| public void acquireWakeLock() { |
| if (mWakeLock.isHeld()) { |
| Slog.wtf(TAG, "WakeLock " + mWakeLock + " already held"); |
| } |
| mWakeLock.acquire(); |
| } |
| |
| @Override |
| public long elapsedRealtimeMillis() { |
| checkWakeLockHeld(); |
| return SystemClock.elapsedRealtime(); |
| } |
| |
| @Override |
| public long systemClockMillis() { |
| checkWakeLockHeld(); |
| return System.currentTimeMillis(); |
| } |
| |
| @Override |
| public void setSystemClock(long newTimeMillis) { |
| checkWakeLockHeld(); |
| mAlarmManager.setTime(newTimeMillis); |
| } |
| |
| @Override |
| public void releaseWakeLock() { |
| checkWakeLockHeld(); |
| mWakeLock.release(); |
| } |
| |
| private void checkWakeLockHeld() { |
| if (!mWakeLock.isHeld()) { |
| Slog.wtf(TAG, "WakeLock " + mWakeLock + " not held"); |
| } |
| } |
| } |