1 /*
   2  * Copyright (c) 2011, 2016, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
















  23 
  24 
  25 package jdk.internal.vm.compiler.word;
  26 
  27 // JaCoCo Exclude
  28 
  29 /**
  30  * Marker interface for location identities. A different location identity of two memory accesses
  31  * guarantees that the two accesses do not interfere.
  32  * <p>
  33  * Clients of {@link LocationIdentity} must use {@link #equals(Object)}, not {@code ==}, when
  34  * comparing two {@link LocationIdentity} values for equality. Likewise, they must not use
  35  * {@link java.util.IdentityHashMap}s with {@link LocationIdentity} values as keys.
  36  *
  37  * @since 1.0
  38  */
  39 public abstract class LocationIdentity {
  40 
  41     private static final class AnyLocationIdentity extends LocationIdentity {
  42         @Override

   1 /*
   2  * Copyright (c) 2011, 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 
  25 
  26 
  27 
  28 
  29 
  30 
  31 
  32 
  33 
  34 
  35 
  36 
  37 
  38 
  39 
  40 
  41 package jdk.internal.vm.compiler.word;
  42 
  43 // JaCoCo Exclude
  44 
  45 /**
  46  * Marker interface for location identities. A different location identity of two memory accesses
  47  * guarantees that the two accesses do not interfere.
  48  * <p>
  49  * Clients of {@link LocationIdentity} must use {@link #equals(Object)}, not {@code ==}, when
  50  * comparing two {@link LocationIdentity} values for equality. Likewise, they must not use
  51  * {@link java.util.IdentityHashMap}s with {@link LocationIdentity} values as keys.
  52  *
  53  * @since 1.0
  54  */
  55 public abstract class LocationIdentity {
  56 
  57     private static final class AnyLocationIdentity extends LocationIdentity {
  58         @Override