| /* |
| * Copyright (c) 2000, 2011, 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 sun.misc.Cleaner; |
| import sun.misc.Unsafe; |
| import sun.misc.VM; |
| 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); |
| #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); |
| #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); |
| #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$$BO$(this, -1, 0, rem, rem, off); |
| } |
| |
| public $Type$Buffer duplicate() { |
| return new Direct$Type$Buffer$RW$$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 + (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))))); |
| } |
| |
| public $Type$Buffer get($type$[] dst, int offset, int length) { |
| #if[rw] |
| if ((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(); |
| |
| #if[!byte] |
| if (order() != ByteOrder.nativeOrder()) |
| Bits.copyTo$Memtype$Array(ix(pos), dst, |
| offset << $LG_BYTES_PER_VALUE$, |
| length << $LG_BYTES_PER_VALUE$); |
| else |
| #end[!byte] |
| Bits.copyToArray(ix(pos), dst, arrayBaseOffset, |
| offset << $LG_BYTES_PER_VALUE$, |
| 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 new IllegalArgumentException(); |
| 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), 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 ((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(); |
| |
| #if[!byte] |
| if (order() != ByteOrder.nativeOrder()) |
| Bits.copyFrom$Memtype$Array(src, offset << $LG_BYTES_PER_VALUE$, |
| ix(pos), length << $LG_BYTES_PER_VALUE$); |
| else |
| #end[!byte] |
| Bits.copyFromArray(src, arrayBaseOffset, offset << $LG_BYTES_PER_VALUE$, |
| ix(pos), 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), 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] |
| |
| } |
