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8234049: Implementation of Memory Access API (Incubator)
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
Maurizio Cimadamore
parent
7cdecd8981
commit
8f4f088a12
59 changed files with 7849 additions and 147 deletions
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@ -30,6 +30,7 @@ package java.nio;
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import java.io.FileDescriptor;
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import java.lang.ref.Reference;
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import java.util.Objects;
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import jdk.internal.access.foreign.MemorySegmentProxy;
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import jdk.internal.misc.VM;
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import jdk.internal.ref.Cleaner;
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import sun.nio.ch.DirectBuffer;
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@ -112,7 +113,7 @@ class Direct$Type$Buffer$RW$$BO$
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//
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Direct$Type$Buffer$RW$(int cap) { // package-private
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#if[rw]
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super(-1, 0, cap, cap);
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super(-1, 0, cap, cap, null);
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boolean pa = VM.isDirectMemoryPageAligned();
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int ps = Bits.pageSize();
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long size = Math.max(1L, (long)cap + (pa ? ps : 0));
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@ -145,8 +146,8 @@ class Direct$Type$Buffer$RW$$BO$
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// Invoked to construct a direct ByteBuffer referring to the block of
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// memory. A given arbitrary object may also be attached to the buffer.
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//
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Direct$Type$Buffer(long addr, int cap, Object ob) {
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super(-1, 0, cap, cap);
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Direct$Type$Buffer(long addr, int cap, Object ob, MemorySegmentProxy segment) {
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super(-1, 0, cap, cap, segment);
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address = addr;
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cleaner = null;
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att = ob;
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@ -156,7 +157,7 @@ class Direct$Type$Buffer$RW$$BO$
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// Invoked only by JNI: NewDirectByteBuffer(void*, long)
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//
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private Direct$Type$Buffer(long addr, int cap) {
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super(-1, 0, cap, cap);
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super(-1, 0, cap, cap, null);
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address = addr;
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cleaner = null;
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att = null;
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@ -169,15 +170,15 @@ class Direct$Type$Buffer$RW$$BO$
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protected Direct$Type$Buffer$RW$(int cap, long addr,
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FileDescriptor fd,
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Runnable unmapper,
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boolean isSync)
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boolean isSync, MemorySegmentProxy segment)
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{
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#if[rw]
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super(-1, 0, cap, cap, fd, isSync);
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super(-1, 0, cap, cap, fd, isSync, segment);
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address = addr;
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cleaner = Cleaner.create(this, unmapper);
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att = null;
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#else[rw]
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super(cap, addr, fd, unmapper, isSync);
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super(cap, addr, fd, unmapper, isSync, segment);
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this.isReadOnly = true;
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#end[rw]
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}
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@ -188,10 +189,10 @@ class Direct$Type$Buffer$RW$$BO$
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//
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Direct$Type$Buffer$RW$$BO$(DirectBuffer db, // package-private
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int mark, int pos, int lim, int cap,
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int off)
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int off, MemorySegmentProxy segment)
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{
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#if[rw]
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super(mark, pos, lim, cap);
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super(mark, pos, lim, cap, segment);
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address = db.address() + off;
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#if[byte]
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cleaner = null;
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@ -199,7 +200,7 @@ class Direct$Type$Buffer$RW$$BO$
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Object attachment = db.attachment();
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att = (attachment == null ? db : attachment);
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#else[rw]
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super(db, mark, pos, lim, cap, off);
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super(db, mark, pos, lim, cap, off, segment);
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this.isReadOnly = true;
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#end[rw]
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}
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@ -216,7 +217,7 @@ class Direct$Type$Buffer$RW$$BO$
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int rem = (pos <= lim ? lim - pos : 0);
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int off = (pos << $LG_BYTES_PER_VALUE$);
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assert (off >= 0);
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return new Direct$Type$Buffer$RW$$BO$(this, -1, 0, rem, rem, off);
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return new Direct$Type$Buffer$RW$$BO$(this, -1, 0, rem, rem, off, segment);
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}
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@Override
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@ -227,7 +228,7 @@ class Direct$Type$Buffer$RW$$BO$
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0,
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length,
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length,
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index);
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index, segment);
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}
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public $Type$Buffer duplicate() {
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@ -236,7 +237,7 @@ class Direct$Type$Buffer$RW$$BO$
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this.position(),
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this.limit(),
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this.capacity(),
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0);
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0, segment);
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}
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public $Type$Buffer asReadOnlyBuffer() {
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@ -246,7 +247,7 @@ class Direct$Type$Buffer$RW$$BO$
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this.position(),
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this.limit(),
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this.capacity(),
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0);
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0, segment);
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#else[rw]
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return duplicate();
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#end[rw]
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@ -264,6 +265,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $type$ get() {
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try {
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checkSegment();
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return $fromBits$($swap$(UNSAFE.get$Swaptype$(ix(nextGetIndex()))));
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} finally {
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Reference.reachabilityFence(this);
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@ -272,6 +274,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $type$ get(int i) {
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try {
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checkSegment();
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return $fromBits$($swap$(UNSAFE.get$Swaptype$(ix(checkIndex(i)))));
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} finally {
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Reference.reachabilityFence(this);
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@ -290,6 +293,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer get($type$[] dst, int offset, int length) {
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#if[rw]
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checkSegment();
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if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) {
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Objects.checkFromIndexSize(offset, length, dst.length);
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int pos = position();
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@ -331,6 +335,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer get(int index, $type$[] dst, int offset, int length) {
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#if[rw]
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checkSegment();
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if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) {
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Objects.checkFromIndexSize(index, length, limit());
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Objects.checkFromIndexSize(offset, length, dst.length);
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@ -368,6 +373,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer put($type$ x) {
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#if[rw]
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try {
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checkSegment();
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UNSAFE.put$Swaptype$(ix(nextPutIndex()), $swap$($toBits$(x)));
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} finally {
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Reference.reachabilityFence(this);
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@ -381,6 +387,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer put(int i, $type$ x) {
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#if[rw]
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try {
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checkSegment();
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UNSAFE.put$Swaptype$(ix(checkIndex(i)), $swap$($toBits$(x)));
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} finally {
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Reference.reachabilityFence(this);
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@ -393,6 +400,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer put($Type$Buffer src) {
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#if[rw]
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checkSegment();
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if (src instanceof Direct$Type$Buffer$BO$) {
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if (src == this)
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throw createSameBufferException();
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@ -439,6 +447,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer put($type$[] src, int offset, int length) {
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#if[rw]
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checkSegment();
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if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_FROM_ARRAY_THRESHOLD) {
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Objects.checkFromIndexSize(offset, length, src.length);
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int pos = position();
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@ -480,6 +489,7 @@ class Direct$Type$Buffer$RW$$BO$
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public $Type$Buffer put(int index, $type$[] src, int offset, int length) {
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#if[rw]
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checkSegment();
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if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_FROM_ARRAY_THRESHOLD) {
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Objects.checkFromIndexSize(index, length, limit());
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Objects.checkFromIndexSize(offset, length, src.length);
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@ -577,7 +587,7 @@ class Direct$Type$Buffer$RW$$BO$
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pos + start,
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pos + end,
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capacity(),
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offset);
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offset, segment);
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}
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#end[char]
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