1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
218 ThreadGroup tg = Thread.currentThread().getThreadGroup();
219 for (ThreadGroup tgn = tg;
220 tgn != null;
221 tg = tgn, tgn = tg.getParent());
222 Thread handler = new ReferenceHandler(tg, "Reference Handler");
223 /* If there were a special system-only priority greater than
224 * MAX_PRIORITY, it would be used here
225 */
226 handler.setPriority(Thread.MAX_PRIORITY);
227 handler.setDaemon(true);
228 handler.start();
229
230 // provide access in SharedSecrets
231 SharedSecrets.setJavaLangRefAccess(new JavaLangRefAccess() {
232 @Override
233 public boolean waitForReferenceProcessing()
234 throws InterruptedException
235 {
236 return Reference.waitForReferenceProcessing();
237 }
238 });
239 }
240
241 /* -- Referent accessor and setters -- */
242
243 /**
244 * Returns this reference object's referent. If this reference object has
245 * been cleared, either by the program or by the garbage collector, then
246 * this method returns <code>null</code>.
247 *
248 * @return The object to which this reference refers, or
249 * <code>null</code> if this reference object has been cleared
250 */
251 @HotSpotIntrinsicCandidate
252 public T get() {
253 return this.referent;
254 }
255
256 /**
257 * Clears this reference object. Invoking this method will not cause this
|
1 /*
2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
218 ThreadGroup tg = Thread.currentThread().getThreadGroup();
219 for (ThreadGroup tgn = tg;
220 tgn != null;
221 tg = tgn, tgn = tg.getParent());
222 Thread handler = new ReferenceHandler(tg, "Reference Handler");
223 /* If there were a special system-only priority greater than
224 * MAX_PRIORITY, it would be used here
225 */
226 handler.setPriority(Thread.MAX_PRIORITY);
227 handler.setDaemon(true);
228 handler.start();
229
230 // provide access in SharedSecrets
231 SharedSecrets.setJavaLangRefAccess(new JavaLangRefAccess() {
232 @Override
233 public boolean waitForReferenceProcessing()
234 throws InterruptedException
235 {
236 return Reference.waitForReferenceProcessing();
237 }
238
239 @Override
240 public void runFinalization() {
241 Finalizer.runFinalization();
242 }
243 });
244 }
245
246 /* -- Referent accessor and setters -- */
247
248 /**
249 * Returns this reference object's referent. If this reference object has
250 * been cleared, either by the program or by the garbage collector, then
251 * this method returns <code>null</code>.
252 *
253 * @return The object to which this reference refers, or
254 * <code>null</code> if this reference object has been cleared
255 */
256 @HotSpotIntrinsicCandidate
257 public T get() {
258 return this.referent;
259 }
260
261 /**
262 * Clears this reference object. Invoking this method will not cause this
|