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openjfx9/modules/javafx.graphics/src/main/java/com/sun/ReentrantContextProviderTL.java

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   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
  23  * questions.
  24  */
  25 package sun.java2d;

  26 
  27 import java.lang.ref.Reference;
  28 
  29 /**
  30 * This ReentrantContextProvider implementation uses a ThreadLocal to hold
  31  * the first ReentrantContext per thread and a ReentrantContextProviderCLQ to
  32  * store child ReentrantContext instances needed during recursion.
  33  *
  34  * Note: this implementation may keep up to one context in memory per thread.
  35  * Child contexts for recursive uses are stored in the queue using a WEAK
  36  * reference by default unless specified in the 2 argument constructor.
  37  *
  38  * @param <K> ReentrantContext subclass
  39  */
  40 public abstract class ReentrantContextProviderTL<K extends ReentrantContext>
  41     extends ReentrantContextProvider<K>
  42 {
  43     // Thread-local storage:
  44     private final ThreadLocal<Reference<K>> ctxTL
  45         = new ThreadLocal<Reference<K>>();




   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
  23  * questions.
  24  */
  25 
  26 package com.sun;
  27 
  28 import java.lang.ref.Reference;
  29 
  30 /**
  31 * This ReentrantContextProvider implementation uses a ThreadLocal to hold
  32  * the first ReentrantContext per thread and a ReentrantContextProviderCLQ to
  33  * store child ReentrantContext instances needed during recursion.
  34  *
  35  * Note: this implementation may keep up to one context in memory per thread.
  36  * Child contexts for recursive uses are stored in the queue using a WEAK
  37  * reference by default unless specified in the 2 argument constructor.
  38  *
  39  * @param <K> ReentrantContext subclass
  40  */
  41 public abstract class ReentrantContextProviderTL<K extends ReentrantContext>
  42     extends ReentrantContextProvider<K>
  43 {
  44     // Thread-local storage:
  45     private final ThreadLocal<Reference<K>> ctxTL
  46         = new ThreadLocal<Reference<K>>();


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