1/*
2 * Copyright (C) 2007 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 java.lang;
18
19class VMThread {
20    Thread thread;
21    int vmData;
22
23    VMThread(Thread t) {
24        thread = t;
25    }
26
27    native static void create(Thread t, long stackSize);
28
29    static native Thread currentThread();
30    static native boolean interrupted();
31    static native void sleep (long msec, int nsec) throws InterruptedException;
32    static native void yield();
33
34    native void interrupt();
35
36    native boolean isInterrupted();
37
38    /**
39     *  Starts the VMThread (and thus the Java Thread) with the given
40     *  stack size.
41     */
42    void start(long stackSize) {
43        VMThread.create(thread, stackSize);
44    }
45
46    /**
47     * Queries whether this Thread holds a monitor lock on the
48     * given object.
49     */
50    native boolean holdsLock(Object object);
51
52    native void setPriority(int newPriority);
53    native int getStatus();
54
55    /**
56     * Holds a mapping from native Thread statuses to Java one. Required for
57     * translating back the result of getStatus().
58     */
59    static final Thread.State[] STATE_MAP = new Thread.State[] {
60        Thread.State.TERMINATED,     // ZOMBIE
61        Thread.State.RUNNABLE,       // RUNNING
62        Thread.State.TIMED_WAITING,  // TIMED_WAIT
63        Thread.State.BLOCKED,        // MONITOR
64        Thread.State.WAITING,        // WAIT
65        Thread.State.NEW,            // INITIALIZING
66        Thread.State.NEW,            // STARTING
67        Thread.State.RUNNABLE,       // NATIVE
68        Thread.State.WAITING,        // VMWAIT
69        Thread.State.RUNNABLE        // SUSPENDED
70    };
71
72    /**
73     * Tell the VM that the thread's name has changed.  This is useful for
74     * DDMS, which would otherwise be oblivious to Thread.setName calls.
75     */
76    native void nameChanged(String newName);
77}
78