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8151163: All Buffer implementations should leverage Unsafe unaligned accessors

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Reviewed-by: shade, aph
This commit is contained in:
Paul Sandoz 2016-07-15 12:36:15 +02:00
parent f7c908cebd
commit 2446e48a5f
3 changed files with 33 additions and 515 deletions
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17
jdk/src/java.base/share/classes/java/nio/Direct-X-Buffer-bin.java.template
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2000, 2003, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2000, 2016, 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
@ -32,11 +32,8 @@ class XXX {
#if[rw]
private $type$ get$Type$(long a) {
if (unaligned) {
$memtype$ x = unsafe.get$Memtype$(a);
return $fromBits$(nativeByteOrder ? x : Bits.swap(x));
}
return Bits.get$Type$(a, bigEndian);
$memtype$ x = unsafe.get$Memtype$Unaligned(null, a, bigEndian);
return $fromBits$(x);
}
public $type$ get$Type$() {
@ -51,12 +48,8 @@ class XXX {
private ByteBuffer put$Type$(long a, $type$ x) {
#if[rw]
if (unaligned) {
$memtype$ y = $toBits$(x);
unsafe.put$Memtype$(a, (nativeByteOrder ? y : Bits.swap(y)));
} else {
Bits.put$Type$(a, x, bigEndian);
}
$memtype$ y = $toBits$(x);
unsafe.put$Memtype$Unaligned(null, a, y, bigEndian);
return this;
#else[rw]
throw new ReadOnlyBufferException();