--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/java/nio/Direct-X-Buffer.java.template Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,516 @@
+/*
+ * 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#warn This file is preprocessed before being compiled
+
+package java.nio;
+
+import java.io.FileDescriptor;
+import jdk.internal.misc.Unsafe;
+import jdk.internal.misc.VM;
+import jdk.internal.ref.Cleaner;
+import sun.nio.ch.DirectBuffer;
+
+
+class Direct$Type$Buffer$RW$$BO$
+#if[rw]
+ extends {#if[byte]?Mapped$Type$Buffer:$Type$Buffer}
+#else[rw]
+ extends Direct$Type$Buffer$BO$
+#end[rw]
+ implements DirectBuffer
+{
+
+#if[rw]
+
+ // Cached unsafe-access object
+ protected static final Unsafe unsafe = Bits.unsafe();
+
+ // Cached array base offset
+ private static final long arrayBaseOffset = (long)unsafe.arrayBaseOffset($type$[].class);
+
+ // Cached unaligned-access capability
+ protected static final boolean unaligned = Bits.unaligned();
+
+ // Base address, used in all indexing calculations
+ // NOTE: moved up to Buffer.java for speed in JNI GetDirectBufferAddress
+ // protected long address;
+
+ // An object attached to this buffer. If this buffer is a view of another
+ // buffer then we use this field to keep a reference to that buffer to
+ // ensure that its memory isn't freed before we are done with it.
+ private final Object att;
+
+ public Object attachment() {
+ return att;
+ }
+
+#if[byte]
+
+ private static class Deallocator
+ implements Runnable
+ {
+
+ private static Unsafe unsafe = Unsafe.getUnsafe();
+
+ private long address;
+ private long size;
+ private int capacity;
+
+ private Deallocator(long address, long size, int capacity) {
+ assert (address != 0);
+ this.address = address;
+ this.size = size;
+ this.capacity = capacity;
+ }
+
+ public void run() {
+ if (address == 0) {
+ // Paranoia
+ return;
+ }
+ unsafe.freeMemory(address);
+ address = 0;
+ Bits.unreserveMemory(size, capacity);
+ }
+
+ }
+
+ private final Cleaner cleaner;
+
+ public Cleaner cleaner() { return cleaner; }
+
+#else[byte]
+
+ public Cleaner cleaner() { return null; }
+
+#end[byte]
+
+#end[rw]
+
+#if[byte]
+
+ // Primary constructor
+ //
+ Direct$Type$Buffer$RW$(int cap) { // package-private
+#if[rw]
+ super(-1, 0, cap, cap);
+ boolean pa = VM.isDirectMemoryPageAligned();
+ int ps = Bits.pageSize();
+ long size = Math.max(1L, (long)cap + (pa ? ps : 0));
+ Bits.reserveMemory(size, cap);
+
+ long base = 0;
+ try {
+ base = unsafe.allocateMemory(size);
+ } catch (OutOfMemoryError x) {
+ Bits.unreserveMemory(size, cap);
+ throw x;
+ }
+ unsafe.setMemory(base, size, (byte) 0);
+ if (pa && (base % ps != 0)) {
+ // Round up to page boundary
+ address = base + ps - (base & (ps - 1));
+ } else {
+ address = base;
+ }
+ cleaner = Cleaner.create(this, new Deallocator(base, size, cap));
+ att = null;
+#else[rw]
+ super(cap);
+ this.isReadOnly = true;
+#end[rw]
+ }
+
+#if[rw]
+
+ // Invoked to construct a direct ByteBuffer referring to the block of
+ // memory. A given arbitrary object may also be attached to the buffer.
+ //
+ Direct$Type$Buffer(long addr, int cap, Object ob) {
+ super(-1, 0, cap, cap);
+ address = addr;
+ cleaner = null;
+ att = ob;
+ }
+
+
+ // Invoked only by JNI: NewDirectByteBuffer(void*, long)
+ //
+ private Direct$Type$Buffer(long addr, int cap) {
+ super(-1, 0, cap, cap);
+ address = addr;
+ cleaner = null;
+ att = null;
+ }
+
+#end[rw]
+
+ // For memory-mapped buffers -- invoked by FileChannelImpl via reflection
+ //
+ protected Direct$Type$Buffer$RW$(int cap, long addr,
+ FileDescriptor fd,
+ Runnable unmapper)
+ {
+#if[rw]
+ super(-1, 0, cap, cap, fd);
+ address = addr;
+ cleaner = Cleaner.create(this, unmapper);
+ att = null;
+#else[rw]
+ super(cap, addr, fd, unmapper);
+ this.isReadOnly = true;
+#end[rw]
+ }
+
+#end[byte]
+
+ // For duplicates and slices
+ //
+ Direct$Type$Buffer$RW$$BO$(DirectBuffer db, // package-private
+ int mark, int pos, int lim, int cap,
+ int off)
+ {
+#if[rw]
+ super(mark, pos, lim, cap);
+ address = db.address() + off;
+#if[byte]
+ cleaner = null;
+#end[byte]
+ att = db;
+#else[rw]
+ super(db, mark, pos, lim, cap, off);
+ this.isReadOnly = true;
+#end[rw]
+ }
+
+ public $Type$Buffer slice() {
+ int pos = this.position();
+ int lim = this.limit();
+ assert (pos <= lim);
+ int rem = (pos <= lim ? lim - pos : 0);
+ int off = (pos << $LG_BYTES_PER_VALUE$);
+ assert (off >= 0);
+ return new Direct$Type$Buffer$RW$$BO$(this, -1, 0, rem, rem, off);
+ }
+
+#if[byte]
+ public $Type$Buffer slice(int pos, int lim) {
+ assert (pos >= 0);
+ assert (pos <= lim);
+ int rem = lim - pos;
+ return new Direct$Type$Buffer$RW$$BO$(this, -1, 0, rem, rem, pos);
+ }
+#end[byte]
+
+ public $Type$Buffer duplicate() {
+ return new Direct$Type$Buffer$RW$$BO$(this,
+ this.markValue(),
+ this.position(),
+ this.limit(),
+ this.capacity(),
+ 0);
+ }
+
+ public $Type$Buffer asReadOnlyBuffer() {
+#if[rw]
+ return new Direct$Type$BufferR$BO$(this,
+ this.markValue(),
+ this.position(),
+ this.limit(),
+ this.capacity(),
+ 0);
+#else[rw]
+ return duplicate();
+#end[rw]
+ }
+
+#if[rw]
+
+ public long address() {
+ return address;
+ }
+
+ private long ix(int i) {
+ return address + ((long)i << $LG_BYTES_PER_VALUE$);
+ }
+
+ public $type$ get() {
+ return $fromBits$($swap$(unsafe.get$Swaptype$(ix(nextGetIndex()))));
+ }
+
+ public $type$ get(int i) {
+ return $fromBits$($swap$(unsafe.get$Swaptype$(ix(checkIndex(i)))));
+ }
+
+#if[streamableType]
+ $type$ getUnchecked(int i) {
+ return $fromBits$($swap$(unsafe.get$Swaptype$(ix(i))));
+ }
+#end[streamableType]
+
+ public $Type$Buffer get($type$[] dst, int offset, int length) {
+#if[rw]
+ if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_TO_ARRAY_THRESHOLD) {
+ checkBounds(offset, length, dst.length);
+ int pos = position();
+ int lim = limit();
+ assert (pos <= lim);
+ int rem = (pos <= lim ? lim - pos : 0);
+ if (length > rem)
+ throw new BufferUnderflowException();
+
+ long dstOffset = arrayBaseOffset + ((long)offset << $LG_BYTES_PER_VALUE$);
+#if[!byte]
+ if (order() != ByteOrder.nativeOrder())
+ unsafe.copySwapMemory(null,
+ ix(pos),
+ dst,
+ dstOffset,
+ (long)length << $LG_BYTES_PER_VALUE$,
+ (long)1 << $LG_BYTES_PER_VALUE$);
+ else
+#end[!byte]
+ unsafe.copyMemory(null,
+ ix(pos),
+ dst,
+ dstOffset,
+ (long)length << $LG_BYTES_PER_VALUE$);
+ position(pos + length);
+ } else {
+ super.get(dst, offset, length);
+ }
+ return this;
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+#end[rw]
+
+ public $Type$Buffer put($type$ x) {
+#if[rw]
+ unsafe.put$Swaptype$(ix(nextPutIndex()), $swap$($toBits$(x)));
+ return this;
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+ public $Type$Buffer put(int i, $type$ x) {
+#if[rw]
+ unsafe.put$Swaptype$(ix(checkIndex(i)), $swap$($toBits$(x)));
+ return this;
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+ public $Type$Buffer put($Type$Buffer src) {
+#if[rw]
+ if (src instanceof Direct$Type$Buffer$BO$) {
+ if (src == this)
+ throw createSameBufferException();
+ Direct$Type$Buffer$RW$$BO$ sb = (Direct$Type$Buffer$RW$$BO$)src;
+
+ int spos = sb.position();
+ int slim = sb.limit();
+ assert (spos <= slim);
+ int srem = (spos <= slim ? slim - spos : 0);
+
+ int pos = position();
+ int lim = limit();
+ assert (pos <= lim);
+ int rem = (pos <= lim ? lim - pos : 0);
+
+ if (srem > rem)
+ throw new BufferOverflowException();
+ unsafe.copyMemory(sb.ix(spos), ix(pos), (long)srem << $LG_BYTES_PER_VALUE$);
+ sb.position(spos + srem);
+ position(pos + srem);
+ } else if (src.hb != null) {
+
+ int spos = src.position();
+ int slim = src.limit();
+ assert (spos <= slim);
+ int srem = (spos <= slim ? slim - spos : 0);
+
+ put(src.hb, src.offset + spos, srem);
+ src.position(spos + srem);
+
+ } else {
+ super.put(src);
+ }
+ return this;
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+ public $Type$Buffer put($type$[] src, int offset, int length) {
+#if[rw]
+ if (((long)length << $LG_BYTES_PER_VALUE$) > Bits.JNI_COPY_FROM_ARRAY_THRESHOLD) {
+ checkBounds(offset, length, src.length);
+ int pos = position();
+ int lim = limit();
+ assert (pos <= lim);
+ int rem = (pos <= lim ? lim - pos : 0);
+ if (length > rem)
+ throw new BufferOverflowException();
+
+ long srcOffset = arrayBaseOffset + ((long)offset << $LG_BYTES_PER_VALUE$);
+#if[!byte]
+ if (order() != ByteOrder.nativeOrder())
+ unsafe.copySwapMemory(src,
+ srcOffset,
+ null,
+ ix(pos),
+ (long)length << $LG_BYTES_PER_VALUE$,
+ (long)1 << $LG_BYTES_PER_VALUE$);
+ else
+#end[!byte]
+ unsafe.copyMemory(src,
+ srcOffset,
+ null,
+ ix(pos),
+ (long)length << $LG_BYTES_PER_VALUE$);
+ position(pos + length);
+ } else {
+ super.put(src, offset, length);
+ }
+ return this;
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+ public $Type$Buffer compact() {
+#if[rw]
+ int pos = position();
+ int lim = limit();
+ assert (pos <= lim);
+ int rem = (pos <= lim ? lim - pos : 0);
+
+ unsafe.copyMemory(ix(pos), ix(0), (long)rem << $LG_BYTES_PER_VALUE$);
+ position(rem);
+ limit(capacity());
+ discardMark();
+ return this;
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+ public boolean isDirect() {
+ return true;
+ }
+
+ public boolean isReadOnly() {
+ return {#if[rw]?false:true};
+ }
+
+
+#if[char]
+
+ public String toString(int start, int end) {
+ if ((end > limit()) || (start > end))
+ throw new IndexOutOfBoundsException();
+ try {
+ int len = end - start;
+ char[] ca = new char[len];
+ CharBuffer cb = CharBuffer.wrap(ca);
+ CharBuffer db = this.duplicate();
+ db.position(start);
+ db.limit(end);
+ cb.put(db);
+ return new String(ca);
+ } catch (StringIndexOutOfBoundsException x) {
+ throw new IndexOutOfBoundsException();
+ }
+ }
+
+
+ // --- Methods to support CharSequence ---
+
+ public CharBuffer subSequence(int start, int end) {
+ int pos = position();
+ int lim = limit();
+ assert (pos <= lim);
+ pos = (pos <= lim ? pos : lim);
+ int len = lim - pos;
+
+ if ((start < 0) || (end > len) || (start > end))
+ throw new IndexOutOfBoundsException();
+ return new DirectCharBuffer$RW$$BO$(this,
+ -1,
+ pos + start,
+ pos + end,
+ capacity(),
+ offset);
+ }
+
+#end[char]
+
+
+
+#if[!byte]
+
+ public ByteOrder order() {
+#if[boS]
+ return ((ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN)
+ ? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
+#end[boS]
+#if[boU]
+ return ((ByteOrder.nativeOrder() != ByteOrder.BIG_ENDIAN)
+ ? ByteOrder.LITTLE_ENDIAN : ByteOrder.BIG_ENDIAN);
+#end[boU]
+ }
+
+#end[!byte]
+
+
+
+#if[byte]
+
+ byte _get(int i) { // package-private
+ return unsafe.getByte(address + i);
+ }
+
+ void _put(int i, byte b) { // package-private
+#if[rw]
+ unsafe.putByte(address + i, b);
+#else[rw]
+ throw new ReadOnlyBufferException();
+#end[rw]
+ }
+
+ // #BIN
+ //
+ // Binary-data access methods for short, char, int, long, float,
+ // and double will be inserted here
+
+#end[byte]
+
+}