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products/sources/formale Sprachen/Java/Openjdk/test/jdk/java/foreign/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 2 kB

Quelle TestLargeSegmentCopy.java Sprache: JAVA

/*
* Copyright (c) 2022, 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.
*
*  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.
*
*/

/*
* @test
* @enablePreview
* @requires sun.arch.data.model == "64"
* @bug 8292851
* @run testng/othervm -Xmx4G TestLargeSegmentCopy
*/

import org.testng.annotations.Test;

import java.lang.foreign.Arena;
import java.lang.foreign.MemorySegment;

import static java.lang.foreign.ValueLayout.JAVA_LONG;

public class TestLargeSegmentCopy {

    @Test
    public void testLargeSegmentCopy() {
        // Make sure the byte size is bigger than Integer.MAX_VALUE
        final int longArrayLength = Integer.MAX_VALUE / Long.BYTES + 100;
        final long[] array = new long[longArrayLength];

        try (var arena = Arena.openConfined()) {
            var segment = MemorySegment.allocateNative((long) longArrayLength * Long.BYTES, Long.SIZE, arena.scope());
            // Should not throw an exception or error
            MemorySegment.copy(segment, JAVA_LONG, 0, array, 0, longArrayLength);
            // Should not throw an exception or error
            MemorySegment.copy(array,0, segment, JAVA_LONG, 0, longArrayLength);
        }

    }

}

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