mirror of git://gcc.gnu.org/git/gcc.git
109 lines
4.2 KiB
Java
109 lines
4.2 KiB
Java
/* VMObject.java -- Reference implementation for VM hooks used by Object
|
|
Copyright (C) 1998, 2002, 2005, 2010 Free Software Foundation, Inc.
|
|
|
|
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
|
|
{
|
|
|
|
private VMObject() {} // Prohibits instantiation.
|
|
|
|
/**
|
|
* 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;
|
|
}
|