| /* VMObject.java -- Reference implementation for VM hooks used by Object |
| Copyright (C) 1998, 2002, 2005 Free Software Foundation |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package java.lang; |
| |
| /** |
| * Object is the ultimate superclass of every class (excepting interfaces). |
| * As such, it needs help from the VM. |
| * |
| * @author John Keiser |
| * @author Eric Blake (ebb9@email.byu.edu) |
| */ |
| final class VMObject |
| { |
| /** |
| * Returns the runtime {@link Class} of a given Object. |
| * |
| * @param obj the object to return the class for. |
| * |
| * @return the class of the Object. |
| */ |
| static native Class getClass(Object obj); |
| |
| /** |
| * The VM is expected to make a field-for-field shallow copy of the |
| * argument. Thus, the copy has the same runtime type as the argument. |
| * Note, however, that the cloned object must still be finalizable, even |
| * if the original has already had finalize() invoked on it. |
| * |
| * @param c the Cloneable to clone |
| * @return the clone |
| */ |
| static native Object clone(Cloneable c); |
| |
| /** |
| * Wakes up one of the threads that is waiting on this Object's monitor. |
| * Only the owner of a lock on the Object may call this method. The Thread |
| * to wake up is chosen arbitrarily. |
| * |
| * @param o the object doing the notify |
| * @throw IllegalMonitorStateException if this Thread does not own the |
| * lock on the Object |
| */ |
| static native void notify(Object o) throws IllegalMonitorStateException; |
| |
| /** |
| * Wakes up all of the threads waiting on this Object's monitor. Only |
| * the owner of the lock on this Object may call this method. |
| * |
| * @param o the object doing the notifyAll |
| * @throws IllegalMonitorStateException if this Thread does not own the |
| * lock on the Object |
| */ |
| static native void notifyAll(Object o) throws IllegalMonitorStateException; |
| |
| /** |
| * Waits a specified amount of time for notify() or notifyAll() to be |
| * called on this Object. The VM does not have to pay attention to the |
| * ns argument, if it does not have that much granularity. |
| * |
| * @param o the object to suspend on |
| * @param ms milliseconds to wait (1,000 milliseconds = 1 second) |
| * @param ns nanoseconds to wait beyond ms (1,000,000 nanoseconds |
| * == 1 millisecond) |
| * @throws IllegalMonitorStateException if this Thread does not own the |
| * lock on the Object |
| * @throws InterruptedException if some other Thread interrupts this Thread |
| */ |
| static native void wait(Object o, long ms, int ns) |
| throws IllegalMonitorStateException, InterruptedException; |
| } |