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8243491: Implementation of Foreign-Memory Access API (Second Incubator)

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Upstream latest changes of the Foreign-Memory Access API

Co-authored-by: Jorn Vernee <jorn.vernee@oracle.com>
Co-authored-by: Mandy Chung <mandy.chung@oracle.com>
Co-authored-by: Paul Sandoz <paul.sandoz@oracle.com>
Co-authored-by: Peter Levart <peter.levart@gmail.com>
Reviewed-by: chegar, psandoz
This commit is contained in:
Chris Hegarty 2020-05-25 10:54:39 +01:00 • committed by Maurizio Cimadamore
parent 9b94b9d1a1
commit f3eb44a94d
94 changed files with 7496 additions and 1388 deletions
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40
src/java.base/share/classes/java/nio/Buffer.java
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@ -29,10 +29,12 @@ import jdk.internal.HotSpotIntrinsicCandidate;
import jdk.internal.access.JavaNioAccess;
import jdk.internal.access.SharedSecrets;
import jdk.internal.access.foreign.MemorySegmentProxy;
import jdk.internal.access.foreign.UnmapperProxy;
import jdk.internal.misc.Unsafe;
import jdk.internal.misc.VM.BufferPool;
import jdk.internal.vm.annotation.ForceInline;
import java.io.FileDescriptor;
import java.util.Spliterator;
/**
@ -768,6 +770,11 @@ public abstract class Buffer {
return new DirectByteBuffer(addr, cap, obj, segment);
}
@Override
public ByteBuffer newMappedByteBuffer(UnmapperProxy unmapperProxy, long address, int cap, Object obj, MemorySegmentProxy segment) {
return new DirectByteBuffer(address, cap, obj, unmapperProxy.fileDescriptor(), unmapperProxy.isSync(), segment);
}
@Override
public ByteBuffer newHeapByteBuffer(byte[] hb, int offset, int capacity, MemorySegmentProxy segment) {
return new HeapByteBuffer(hb, offset, capacity, segment);
@ -784,8 +791,37 @@ public abstract class Buffer {
}
@Override
public void checkSegment(Buffer buffer) {
buffer.checkSegment();
public UnmapperProxy unmapper(ByteBuffer bb) {
if (bb instanceof MappedByteBuffer) {
return ((MappedByteBuffer)bb).unmapper();
} else {
return null;
}
}
@Override
public MemorySegmentProxy bufferSegment(Buffer buffer) {
return buffer.segment;
}
@Override
public void force(FileDescriptor fd, long address, boolean isSync, long offset, long size) {
MappedMemoryUtils.force(fd, address, isSync, offset, size);
}
@Override
public void load(long address, boolean isSync, long size) {
MappedMemoryUtils.load(address, isSync, size);
}
@Override
public void unload(long address, boolean isSync, long size) {
MappedMemoryUtils.unload(address, isSync, size);
}
@Override
public boolean isLoaded(long address, boolean isSync, long size) {
return MappedMemoryUtils.isLoaded(address, isSync, size);
}
});
}