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Cleanups, simplifications, and small bugfixes.
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34 changes: 34 additions & 0 deletions
34
...rc/com.oracle.svm.core/src/com/oracle/svm/core/collections/UninterruptibleComparable.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| /* | ||
| * Copyright (c) 2024, 2024, 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 com.oracle.svm.core.collections; | ||
|
|
||
| import static com.oracle.svm.core.Uninterruptible.CALLED_FROM_UNINTERRUPTIBLE_CODE; | ||
|
|
||
| import com.oracle.svm.core.Uninterruptible; | ||
|
|
||
| public interface UninterruptibleComparable { | ||
| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| int compareTo(UninterruptibleComparable other); | ||
| } |
106 changes: 106 additions & 0 deletions
106
...rc/com.oracle.svm.core/src/com/oracle/svm/core/collections/UninterruptibleLinkedList.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| /* | ||
| * Copyright (c) 2024, 2024, 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 com.oracle.svm.core.collections; | ||
|
|
||
| import static com.oracle.svm.core.Uninterruptible.CALLED_FROM_UNINTERRUPTIBLE_CODE; | ||
|
|
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| import com.oracle.svm.core.Uninterruptible; | ||
| import com.oracle.svm.core.util.VMError; | ||
|
|
||
| /** An uninterruptible singly linked list. */ | ||
| public final class UninterruptibleLinkedList { | ||
| private Element head; | ||
| private Element tail; | ||
|
|
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| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| public Element getHead() { | ||
| return head; | ||
| } | ||
|
|
||
| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| public void append(Element sample) { | ||
| assert sample != null; | ||
| assert sample.getNext() == null; | ||
|
|
||
| if (tail == null || head == null) { | ||
| assert tail == head; | ||
| tail = sample; | ||
| head = sample; | ||
| } else { | ||
| tail.setNext(sample); | ||
| tail = sample; | ||
| } | ||
| } | ||
|
|
||
| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| public void remove(Element sample) { | ||
| assert sample != null; | ||
|
|
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| Element prev = findPrevious(sample); | ||
| if (prev == null) { | ||
| head = sample.getNext(); | ||
| } else { | ||
| prev.setNext(sample.getNext()); | ||
| } | ||
|
|
||
| if (tail == sample) { | ||
| tail = prev; | ||
| } | ||
| sample.setNext(null); | ||
| } | ||
|
|
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| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| private Element findPrevious(Element sample) { | ||
| Element prev = null; | ||
| Element cur = head; | ||
| while (cur != null) { | ||
| if (cur == sample) { | ||
| break; | ||
| } | ||
| prev = cur; | ||
| cur = cur.getNext(); | ||
| } | ||
| VMError.guarantee(cur != null, "obj must be in the list"); | ||
| return prev; | ||
| } | ||
|
|
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| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| public Element pop() { | ||
| Element result = head; | ||
| if (result != null) { | ||
| remove(result); | ||
| } | ||
| return result; | ||
| } | ||
|
|
||
| public interface Element { | ||
| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| Element getNext(); | ||
|
|
||
| @Uninterruptible(reason = CALLED_FROM_UNINTERRUPTIBLE_CODE, mayBeInlined = true) | ||
| void setNext(Element element); | ||
| } | ||
| } |
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