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
17package android.os;
18
19import com.android.layoutlib.bridge.impl.DelegateManager;
20import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
21import 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 */
33public 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