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8318421: AbstractPipeline.sourceStageSpliterator() chases pointers needlessly

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Reviewed-by: psandoz
This commit is contained in:
Viktor Klang 2023-10-20 16:32:11 +00:00 committed by Paul Sandoz
parent 200b5a27d4
commit 21215753c0
1 changed files with 10 additions and 9 deletions
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19
src/java.base/share/classes/java/util/stream/AbstractPipeline.java
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@ -262,8 +262,9 @@ abstract class AbstractPipeline<E_IN, E_OUT, S extends BaseStream<E_OUT, S>>
* @throws IllegalStateException if this pipeline stage is not the source
* stage.
*/
@SuppressWarnings("unchecked")
final Spliterator<E_OUT> sourceStageSpliterator() {
// Ensures that this method is only ever called on the sourceStage
if (this != sourceStage)
throw new IllegalStateException();
@ -271,16 +272,16 @@ abstract class AbstractPipeline<E_IN, E_OUT, S extends BaseStream<E_OUT, S>>
throw new IllegalStateException(MSG_STREAM_LINKED);
linkedOrConsumed = true;
if (sourceStage.sourceSpliterator != null) {
if (sourceSpliterator != null) {
@SuppressWarnings("unchecked")
Spliterator<E_OUT> s = sourceStage.sourceSpliterator;
sourceStage.sourceSpliterator = null;
Spliterator<E_OUT> s = (Spliterator<E_OUT>)sourceSpliterator;
sourceSpliterator = null;
return s;
}
else if (sourceStage.sourceSupplier != null) {
else if (sourceSupplier != null) {
@SuppressWarnings("unchecked")
Spliterator<E_OUT> s = (Spliterator<E_OUT>) sourceStage.sourceSupplier.get();
sourceStage.sourceSupplier = null;
Spliterator<E_OUT> s = (Spliterator<E_OUT>)sourceSupplier.get();
sourceSupplier = null;
return s;
}
else {
@ -309,8 +310,8 @@ abstract class AbstractPipeline<E_IN, E_OUT, S extends BaseStream<E_OUT, S>>
linkedOrConsumed = true;
sourceSupplier = null;
sourceSpliterator = null;
if (sourceStage.sourceCloseAction != null) {
Runnable closeAction = sourceStage.sourceCloseAction;
Runnable closeAction = sourceStage.sourceCloseAction;
if (closeAction != null) {
sourceStage.sourceCloseAction = null;
closeAction.run();
}