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/*
* Copyright (c) 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.
*
* 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
* @summary Test MemorySegment::fill
* @run junit TestFill
*/
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import java.lang.foreign.Arena;
import java.lang.foreign.ValueLayout;
import java.util.Arrays;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.atomic.AtomicReference;
import java.util.stream.IntStream;
import java.util.stream.Stream;
import static org.junit.jupiter.api.Assertions.*;
final class TestFill {
// Make sure negative values are treated as expected
private static final byte VALUE = -71;
@ParameterizedTest
@MethodSource("sizes")
void testFill(int len) {
int offset = 16;
int expandedLen = offset + MAX_SIZE + offset;
// Make sure fill only affects the intended region XXXXXX
//
// ................XXXXXX................
// | offset | len | offset |
try (var arena = Arena.ofConfined()) {
var segment = arena.allocate(expandedLen);
var slice = segment.asSlice(offset, len);
slice.fill(VALUE);
var expected = new byte[expandedLen];
Arrays.fill(expected, offset, offset + len, VALUE);
// This checks the actual fill region as well as potential under and overflows
assertArrayEquals(expected, segment.toArray(ValueLayout.JAVA_BYTE));
}
}
@ParameterizedTest
@MethodSource("values")
void testValues(int value) {
int size = 0b1111;
try (var arena = Arena.ofConfined()) {
var segment = arena.allocate(size);
segment.fill((byte) value);
assertTrue(segment.elements(ValueLayout.JAVA_BYTE)
.map(s -> s.get(ValueLayout.JAVA_BYTE, 0))
.allMatch(v -> v == value), "Failed to fill with value " + value);
}
}
@ParameterizedTest
@MethodSource("sizes")
void testReadOnly(int len) {
try (var arena = Arena.ofConfined()) {
var segment = arena.allocate(len).asReadOnly();
assertThrows(IllegalArgumentException.class, () -> segment.fill(VALUE));
}
}
@ParameterizedTest
@MethodSource("sizes")
void testConfinement(int len) {
try (var arena = Arena.ofConfined()) {
var segment = arena.allocate(len);
AtomicReference<RuntimeException> ex = new AtomicReference<>();
CompletableFuture<Void> future = CompletableFuture.runAsync(() -> {
try {
segment.fill(VALUE);
} catch (RuntimeException e) {
ex.set(e);
}
});
future.join();
assertInstanceOf(WrongThreadException.class, ex.get());
}
}
@ParameterizedTest
@MethodSource("sizes")
void testScope(int len) {
var arena = Arena.ofConfined();
var segment = arena.allocate(len);
arena.close();
assertThrows(IllegalStateException.class, () -> segment.fill(VALUE));
}
private static final int MAX_SIZE = 1 << 10;
private static Stream<Arguments> sizes() {
return IntStream.of(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 23, 32, 63, 128, 256, 511, MAX_SIZE)
.boxed()
.map(Arguments::of);
}
private static Stream<Arguments> values() {
return IntStream.rangeClosed(Byte.MIN_VALUE, Byte.MAX_VALUE)
.boxed()
.map(Arguments::of);
}
}
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