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5029431: (bf) Add absolute bulk put and get methods

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Reviewed-by: alanb, darcy, chegar, rriggs
This commit is contained in:
Brian Burkhalter 2019-02-20 10:57:22 -08:00
parent 2ee61b353b
commit 315b7d0399
12 changed files with 804 additions and 29 deletions
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73
src/java.base/share/classes/java/nio/Direct-X-Buffer.java.template
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -29,6 +29,7 @@ package java.nio;
import java.io.FileDescriptor;
import java.lang.ref.Reference;
import java.util.Objects;
import jdk.internal.misc.VM;
import jdk.internal.ref.Cleaner;
import sun.nio.ch.DirectBuffer;
@ -325,6 +326,40 @@ class Direct$Type$Buffer$RW$$BO$
#end[rw]
}
public $Type$Buffer get(int index, $type$[] dst, int offset, int length) {
#if[rw]
if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) {
Objects.checkFromIndexSize(index, length, limit());
Objects.checkFromIndexSize(offset, length, dst.length);
long dstOffset = ARRAY_BASE_OFFSET + ((long)offset << $LG_BYTES_PER_VALUE$);
try {
#if[!byte]
if (order() != ByteOrder.nativeOrder())
UNSAFE.copySwapMemory(null,
ix(index),
dst,
dstOffset,
(long)length << $LG_BYTES_PER_VALUE$,
(long)1 << $LG_BYTES_PER_VALUE$);
else
#end[!byte]
UNSAFE.copyMemory(null,
ix(index),
dst,
dstOffset,
(long)length << $LG_BYTES_PER_VALUE$);
} finally {
Reference.reachabilityFence(this);
}
} else {
super.get(index, dst, offset, length);
}
return this;
#else[rw]
throw new ReadOnlyBufferException();
#end[rw]
}
#end[rw]
public $Type$Buffer put($type$ x) {
@ -440,6 +475,42 @@ class Direct$Type$Buffer$RW$$BO$
#end[rw]
}
public $Type$Buffer put(int index, $type$[] src, int offset, int length) {
#if[rw]
if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_FROM_ARRAY_THRESHOLD) {
Objects.checkFromIndexSize(index, length, limit());
Objects.checkFromIndexSize(offset, length, src.length);
long srcOffset = ARRAY_BASE_OFFSET + ((long)offset << $LG_BYTES_PER_VALUE$);
try {
#if[!byte]
if (order() != ByteOrder.nativeOrder())
UNSAFE.copySwapMemory(src,
srcOffset,
null,
ix(index),
(long)length << $LG_BYTES_PER_VALUE$,
(long)1 << $LG_BYTES_PER_VALUE$);
else
#end[!byte]
UNSAFE.copyMemory(src,
srcOffset,
null,
ix(index),
(long)length << $LG_BYTES_PER_VALUE$);
} finally {
Reference.reachabilityFence(this);
}
} else {
super.put(index, src, offset, length);
}
return this;
#else[rw]
throw new ReadOnlyBufferException();
#end[rw]
}
public $Type$Buffer compact() {
#if[rw]
int pos = position();