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8234049: Implementation of Memory Access API (Incubator)

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Co-authored-by: Vlaidmir Ivanov <vladimir.x.ivanov@oracle.com>
Reviewed-by: alanb, psandoz, chegar, rriggs, plevart, briangoetz, jrose, adinn, vlivanov
This commit is contained in:
Jorn Vernee 2019-12-12 22:59:57 +00:00 • committed by Maurizio Cimadamore
parent 7cdecd8981
commit 8f4f088a12
59 changed files with 7849 additions and 147 deletions
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27
src/java.base/share/classes/java/nio/ByteBufferAs-X-Buffer.java.template
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@ -28,6 +28,7 @@
package java.nio;
import java.util.Objects;
import jdk.internal.access.foreign.MemorySegmentProxy;
import jdk.internal.misc.Unsafe;
class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
@ -40,11 +41,11 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
#end[rw]
ByteBufferAs$Type$Buffer$RW$$BO$(ByteBuffer bb) { // package-private
ByteBufferAs$Type$Buffer$RW$$BO$(ByteBuffer bb, MemorySegmentProxy segment) { // package-private
#if[rw]
super(-1, 0,
bb.remaining() >> $LG_BYTES_PER_VALUE$,
bb.remaining() >> $LG_BYTES_PER_VALUE$);
bb.remaining() >> $LG_BYTES_PER_VALUE$, segment);
this.bb = bb;
// enforce limit == capacity
int cap = this.capacity();
@ -53,21 +54,21 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
assert (pos <= cap);
address = bb.address;
#else[rw]
super(bb);
super(bb, segment);
#end[rw]
}
ByteBufferAs$Type$Buffer$RW$$BO$(ByteBuffer bb,
int mark, int pos, int lim, int cap,
long addr)
long addr, MemorySegmentProxy segment)
{
#if[rw]
super(mark, pos, lim, cap);
super(mark, pos, lim, cap, segment);
this.bb = bb;
address = addr;
assert address >= bb.address;
#else[rw]
super(bb, mark, pos, lim, cap, addr);
super(bb, mark, pos, lim, cap, addr, segment);
#end[rw]
}
@ -82,7 +83,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
assert (pos <= lim);
int rem = (pos <= lim ? lim - pos : 0);
long addr = byteOffset(pos);
return new ByteBufferAs$Type$Buffer$RW$$BO$(bb, -1, 0, rem, rem, addr);
return new ByteBufferAs$Type$Buffer$RW$$BO$(bb, -1, 0, rem, rem, addr, segment);
}
@Override
@ -93,7 +94,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
0,
length,
length,
byteOffset(index));
byteOffset(index), segment);
}
public $Type$Buffer duplicate() {
@ -102,7 +103,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
this.position(),
this.limit(),
this.capacity(),
address);
address, segment);
}
public $Type$Buffer asReadOnlyBuffer() {
@ -112,7 +113,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
this.position(),
this.limit(),
this.capacity(),
address);
address, segment);
#else[rw]
return duplicate();
#end[rw]
@ -130,12 +131,14 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
}
public $type$ get() {
checkSegment();
$memtype$ x = UNSAFE.get$Memtype$Unaligned(bb.hb, byteOffset(nextGetIndex()),
{#if[boB]?true:false});
return $fromBits$(x);
}
public $type$ get(int i) {
checkSegment();
$memtype$ x = UNSAFE.get$Memtype$Unaligned(bb.hb, byteOffset(checkIndex(i)),
{#if[boB]?true:false});
return $fromBits$(x);
@ -153,6 +156,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
public $Type$Buffer put($type$ x) {
#if[rw]
checkSegment();
$memtype$ y = $toBits$(x);
UNSAFE.put$Memtype$Unaligned(bb.hb, byteOffset(nextPutIndex()), y,
{#if[boB]?true:false});
@ -164,6 +168,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
public $Type$Buffer put(int i, $type$ x) {
#if[rw]
checkSegment();
$memtype$ y = $toBits$(x);
UNSAFE.put$Memtype$Unaligned(bb.hb, byteOffset(checkIndex(i)), y,
{#if[boB]?true:false});
@ -237,7 +242,7 @@ class ByteBufferAs$Type$Buffer$RW$$BO$ // package-private
pos + start,
pos + end,
capacity(),
address);
address, segment);
}
#end[char]