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8234049: Implementation of Memory Access API (Incubator)

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Co-authored-by: Vlaidmir Ivanov <vladimir.x.ivanov@oracle.com>
Reviewed-by: alanb, psandoz, chegar, rriggs, plevart, briangoetz, jrose, adinn, vlivanov
This commit is contained in:
Jorn Vernee 2019-12-12 22:59:57 +00:00 • committed by Maurizio Cimadamore
parent 7cdecd8981
commit 8f4f088a12
59 changed files with 7849 additions and 147 deletions
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7
src/java.base/share/classes/java/lang/invoke/X-VarHandleByteArrayView.java.template
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@ -24,6 +24,8 @@
*/
package java.lang.invoke;
import jdk.internal.access.JavaNioAccess;
import jdk.internal.access.SharedSecrets;
import jdk.internal.misc.Unsafe;
import jdk.internal.util.Preconditions;
import jdk.internal.vm.annotation.ForceInline;
@ -38,6 +40,8 @@ import static java.lang.invoke.MethodHandleStatics.UNSAFE;
final class VarHandleByteArrayAs$Type$s extends VarHandleByteArrayBase {
static JavaNioAccess nioAccess = SharedSecrets.getJavaNioAccess();
static final int ALIGN = $BoxType$.BYTES - 1;
#if[floatingPoint]
@ -529,6 +533,7 @@ final class VarHandleByteArrayAs$Type$s extends VarHandleByteArrayBase {
@ForceInline
static int index(ByteBuffer bb, int index) {
nioAccess.checkSegment(bb);
return Preconditions.checkIndex(index, UNSAFE.getInt(bb, BUFFER_LIMIT) - ALIGN, null);
}
@ -536,7 +541,7 @@ final class VarHandleByteArrayAs$Type$s extends VarHandleByteArrayBase {
static int indexRO(ByteBuffer bb, int index) {
if (UNSAFE.getBoolean(bb, BYTE_BUFFER_IS_READ_ONLY))
throw new ReadOnlyBufferException();
return Preconditions.checkIndex(index, UNSAFE.getInt(bb, BUFFER_LIMIT) - ALIGN, null);
return index(bb, index);
}
@ForceInline