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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.os;
     18 
     19 import com.android.layoutlib.bridge.impl.DelegateManager;
     20 import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
     21 import com.android.tools.layoutlib.java.System_Delegate;
     22 
     23 /**
     24  * Delegate implementing the native methods of android.os.SystemClock
     25  *
     26  * Through the layoutlib_create tool, the original native methods of SystemClock have been replaced
     27  * by calls to methods of the same name in this delegate class.
     28  *
     29  * Because it's a stateless class to start with, there's no need to keep a {@link DelegateManager}
     30  * around to map int to instance of the delegate.
     31  *
     32  */
     33 public class SystemClock_Delegate {
     34     /**
     35      * Returns milliseconds since boot, not counting time spent in deep sleep.
     36      * <b>Note:</b> This value may get reset occasionally (before it would
     37      * otherwise wrap around).
     38      *
     39      * @return milliseconds of non-sleep uptime since boot.
     40      */
     41     @LayoutlibDelegate
     42     /*package*/ static long uptimeMillis() {
     43         return System_Delegate.currentTimeMillis() - System_Delegate.bootTimeMillis();
     44     }
     45 
     46     /**
     47      * Returns milliseconds since boot, including time spent in sleep.
     48      *
     49      * @return elapsed milliseconds since boot.
     50      */
     51     @LayoutlibDelegate
     52     /*package*/ static long elapsedRealtime() {
     53         return System_Delegate.currentTimeMillis() - System_Delegate.bootTimeMillis();
     54     }
     55 
     56     /**
     57      * Returns nanoseconds since boot, including time spent in sleep.
     58      *
     59      * @return elapsed nanoseconds since boot.
     60      */
     61     @LayoutlibDelegate
     62     /*package*/ static long elapsedRealtimeNanos() {
     63         return System_Delegate.nanoTime() - System_Delegate.bootTime();
     64     }
     65 
     66     /**
     67      * Returns milliseconds running in the current thread.
     68      *
     69      * @return elapsed milliseconds in the thread
     70      */
     71     @LayoutlibDelegate
     72     /*package*/ static long currentThreadTimeMillis() {
     73         return System_Delegate.currentTimeMillis();
     74     }
     75 
     76     /**
     77      * Returns microseconds running in the current thread.
     78      *
     79      * @return elapsed microseconds in the thread
     80      *
     81      * @hide
     82      */
     83     @LayoutlibDelegate
     84     /*package*/ static long currentThreadTimeMicro() {
     85         return System_Delegate.currentTimeMillis() * 1000;
     86     }
     87 
     88     /**
     89      * Returns current wall time in  microseconds.
     90      *
     91      * @return elapsed microseconds in wall time
     92      *
     93      * @hide
     94      */
     95     @LayoutlibDelegate
     96     /*package*/ static long currentTimeMicro() {
     97         return elapsedRealtime() * 1000;
     98     }
     99 }
    100