--- a/jdk/src/jdk.runtime/share/classes/sun/tracing/dtrace/Activation.java Thu Feb 19 11:24:00 2015 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,107 +0,0 @@
-/*
- * Copyright (c) 2008, 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. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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.tracing.dtrace;
-
-import java.lang.ref.WeakReference;
-import java.lang.ref.ReferenceQueue;
-import java.security.Permission;
-import java.util.HashSet;
-
-class Activation {
- private SystemResource resource;
- private int referenceCount;
-
- Activation(String moduleName, DTraceProvider[] providers) {
- SecurityManager security = System.getSecurityManager();
- if (security != null) {
- Permission perm =
- new RuntimePermission("com.sun.tracing.dtrace.createProvider");
- security.checkPermission(perm);
- }
- referenceCount = providers.length;
- for (DTraceProvider p : providers) {
- p.setActivation(this);
- }
- resource = new SystemResource(
- this, JVM.activate(moduleName, providers));
- }
-
- void disposeProvider(DTraceProvider p) {
- if (--referenceCount == 0) {
- resource.dispose();
- }
- }
-}
-
-/**
- * The native resource part of an Activation.
- *
- * This holds the native handle.
- *
- * If the user loses a reference to a set of Providers without disposing them,
- * and GC determines the Activation is unreachable, then the next
- * activation or flush call will automatically dispose the unreachable objects
- *
- * The SystemResource instances are creating during activation, and
- * unattached during disposal. When created, they always have a
- * strong reference to them via the {@code resources} static member. Explicit
- * {@code dispose} calls will unregister the native resource and remove
- * references to the SystemResource object. Absent an explicit dispose,
- * when their associated Activation object becomes garbage, the SystemResource
- * object will be enqueued on the reference queue and disposed at the
- * next call to {@code flush}.
- */
-class SystemResource extends WeakReference<Activation> {
-
- private long handle;
-
- private static ReferenceQueue<Activation> referenceQueue =
- referenceQueue = new ReferenceQueue<Activation>();
- static HashSet<SystemResource> resources = new HashSet<SystemResource>();
-
- SystemResource(Activation activation, long handle) {
- super(activation, referenceQueue);
- this.handle = handle;
- flush();
- resources.add(this);
- }
-
- void dispose() {
- JVM.dispose(handle);
- resources.remove(this);
- handle = 0;
- }
-
- static void flush() {
- SystemResource resource = null;
- while ((resource = (SystemResource)referenceQueue.poll()) != null) {
- if (resource.handle != 0) {
- resource.dispose();
- }
- }
- }
-}
-