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8295044: Implementation of Foreign Function and Memory API (Second Preview)

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Co-authored-by: Jorn Vernee <jvernee@openjdk.org>
Co-authored-by: Per Minborg <pminborg@openjdk.org>
Co-authored-by: Maurizio Cimadamore <mcimadamore@openjdk.org>
Reviewed-by: jvernee, pminborg, psandoz, alanb, sundar
This commit is contained in:
Maurizio Cimadamore 2022-12-05 13:49:53 +00:00
parent bd381886e0
commit 73baadceb6
252 changed files with 9221 additions and 7889 deletions
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64
src/java.base/share/classes/java/lang/foreign/PaddingLayout.java
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@ -25,76 +25,30 @@
*/
package java.lang.foreign;
import java.util.Objects;
import java.util.Optional;
import jdk.internal.foreign.layout.PaddingLayoutImpl;
import jdk.internal.javac.PreviewFeature;
/**
* A padding layout. A padding layout specifies the size of extra space which is typically not accessed by applications,
* and is typically used for aligning member layouts around word boundaries.
*
* @implSpec
* This class is immutable, thread-safe and <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>.
* Implementing classes are immutable, thread-safe and <a href="{@docRoot}/java.base/java/lang/doc-files/ValueBased.html">value-based</a>.
*
* @since 20
*/
/* package-private */ final class PaddingLayout extends AbstractLayout implements MemoryLayout {
PaddingLayout(long size) {
this(size, 1, Optional.empty());
}
PaddingLayout(long size, long alignment, Optional<String> name) {
super(size, alignment, name);
}
@Override
public String toString() {
return decorateLayoutString("x" + bitSize());
}
@Override
public boolean equals(Object other) {
if (this == other) {
return true;
}
if (!super.equals(other)) {
return false;
}
if (!(other instanceof PaddingLayout p)) {
return false;
}
return bitSize() == p.bitSize();
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), bitSize());
}
@Override
PaddingLayout dup(long alignment, Optional<String> name) {
return new PaddingLayout(bitSize(), alignment, name);
}
@Override
public boolean hasNaturalAlignment() {
return true;
}
//hack: the declarations below are to make javadoc happy; we could have used generics in AbstractLayout
//but that causes issues with javadoc, see JDK-8224052
@PreviewFeature(feature=PreviewFeature.Feature.FOREIGN)
public sealed interface PaddingLayout extends MemoryLayout permits PaddingLayoutImpl {
/**
* {@inheritDoc}
*/
@Override
public PaddingLayout withName(String name) {
return (PaddingLayout)super.withName(name);
}
PaddingLayout withName(String name);
/**
* {@inheritDoc}
*/
@Override
public PaddingLayout withBitAlignment(long alignmentBits) {
return (PaddingLayout)super.withBitAlignment(alignmentBits);
}
PaddingLayout withBitAlignment(long bitAlignment);
}