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/*
* Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*
*/
package sun.jvm.hotspot.livejvm;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.oops.*;
import sun.jvm.hotspot.utilities.*;
class JNIHandleAccessor {
private Address addr;
private ObjectHeap heap;
JNIHandleAccessor(Address addr, ObjectHeap heap) {
this.addr = addr;
this.heap = heap;
}
Oop getValue() {
// Accessing the contents of the JNIHandle is a double dereference
Address handle = addr.getAddressAt(0);
if (handle == null) return null;
return heap.newOop(handle.getOopHandleAt(0));
}
void setValue(Oop value) {
Address handle = addr.getAddressAt(0);
if (Assert.ASSERTS_ENABLED) {
Assert.that(handle != null, "Must have valid global JNI handle for setting");
}
handle.setOopHandleAt(0, value.getHandle());
}
}
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