From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../java/lang/InheritableThreadLocal.java | 98 ++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 libjava/classpath/java/lang/InheritableThreadLocal.java (limited to 'libjava/classpath/java/lang/InheritableThreadLocal.java') diff --git a/libjava/classpath/java/lang/InheritableThreadLocal.java b/libjava/classpath/java/lang/InheritableThreadLocal.java new file mode 100644 index 000000000..07d52b5d0 --- /dev/null +++ b/libjava/classpath/java/lang/InheritableThreadLocal.java @@ -0,0 +1,98 @@ +/* InheritableThreadLocal -- a ThreadLocal which inherits values across threads + Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006 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; + +/** + * A ThreadLocal whose value is inherited by child Threads. The value of the + * InheritableThreadLocal associated with the (parent) Thread is copied to + * the new (child) Thread at the moment of creation. + * + *

It is possible to make the value associated with the child Thread a + * function of the value that is associated with the parent Thread by + * overriding the childValue() method. The utility of this class + * is in transferring items like User ID or Transaction ID across threads + * automatically. + * + * @author Mark Wielaard (mark@klomp.org) + * @author Eric Blake (ebb9@email.byu.edu) + * @author Tom Tromey (tromey@redhat.com) + * @author Andrew John Hughes (gnu_andrew@member.fsf.org) + * @see ThreadLocal + * @since 1.2 + * @status updated to 1.4 + */ +public class InheritableThreadLocal extends ThreadLocal +{ + + /** + * Creates a new InheritableThreadLocal that has no values associated + * with it yet. + */ + public InheritableThreadLocal() + { + } + + /** + * Determines the value associated with a newly created child Thread as a + * function of the value associated with the currently executing (parent) + * Thread. The default implementation just returns the parentValue. + * + * @param parentValue the value of this object in the parent thread at + * the moment of creation of the child + * @return the initial value for the child thread + */ + protected T childValue(T parentValue) + { + return parentValue; + } + + /** + * Generates the childValues of all InheritableThreadLocals + * that are in the heritage of the current Thread for the newly created + * childThread. Should be called from the constructor Thread. + * + * @param childThread the newly created thread, to inherit from this thread + * @see Thread#Thread(ThreadGroup, Runnable, String) + */ + static void newChildThread(Thread childThread) + { + // The currentThread is the parent of the new thread. + Thread parentThread = Thread.currentThread(); + childThread.locals.inherit(parentThread.locals); + } +} -- cgit v1.2.3