hg: jdk/jdk: 8246050: Improve scalability of MemoryScope

[maurizio.cimadamore at oracle.com]

Changeset: 41651bcb6923
Author:    mcimadamore
Date:      2020-05-29 12:12 +0100
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/41651bcb6923

8246050: Improve scalability of MemoryScope
Summary: Reiplement memory scope using StampedLock
Reviewed-by: psandoz
Contributed-by: peter.levart at gmail.com

! src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/AbstractMemorySegmentImpl.java
! src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/HeapMemorySegmentImpl.java
! src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/MappedMemorySegmentImpl.java
! src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/MemoryScope.java
! src/jdk.incubator.foreign/share/classes/jdk/internal/foreign/NativeMemorySegmentImpl.java
! test/jdk/java/foreign/TestByteBuffer.java