From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libjava/java/nio/DirectByteBufferImpl.java | 429 +++++++++++++++++++++++++++++ 1 file changed, 429 insertions(+) create mode 100644 libjava/java/nio/DirectByteBufferImpl.java (limited to 'libjava/java/nio/DirectByteBufferImpl.java') diff --git a/libjava/java/nio/DirectByteBufferImpl.java b/libjava/java/nio/DirectByteBufferImpl.java new file mode 100644 index 000000000..dd40d5a41 --- /dev/null +++ b/libjava/java/nio/DirectByteBufferImpl.java @@ -0,0 +1,429 @@ +/* DirectByteBufferImpl.java -- + Copyright (C) 2003, 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package java.nio; + +import gnu.gcj.RawData; + +abstract class DirectByteBufferImpl extends ByteBuffer +{ + /** + * The owner is used to keep alive the object that actually owns the + * memory. There are three possibilities: + * 1) owner == this: We allocated the memory and we should free it, + * but *only* in finalize (if we've been sliced + * other objects will also have access to the + * memory). + * 2) owner == null: The byte buffer was created thru + * JNI.NewDirectByteBuffer. The JNI code is + * responsible for freeing the memory. + * 3) owner == some other object: The other object allocated the + * memory and should free it. + */ + private final Object owner; + + static final class ReadOnly extends DirectByteBufferImpl + { + ReadOnly(Object owner, RawData address, + int capacity, int limit, + int position) + { + super(owner, address, capacity, limit, position); + } + + public ByteBuffer put(byte value) + { + throw new ReadOnlyBufferException (); + } + + public ByteBuffer put(int index, byte value) + { + throw new ReadOnlyBufferException (); + } + + public boolean isReadOnly() + { + return true; + } + } + + static final class ReadWrite extends DirectByteBufferImpl + { + ReadWrite(int capacity) + { + super(capacity); + } + + ReadWrite(RawData address, int capacity) + { + super(address, capacity); + } + + ReadWrite(Object owner, RawData address, + int capacity, int limit, + int position) + { + super(owner, address, capacity, limit, position); + } + + public boolean isReadOnly() + { + return false; + } + } + + DirectByteBufferImpl(int capacity) + { + super(capacity, capacity, 0, -1, + VMDirectByteBuffer.allocate(capacity), null, 0); + this.owner = this; + } + + DirectByteBufferImpl(RawData address, int capacity) + { + super(capacity, capacity, 0, -1, address, null, 0); + this.owner = null; + } + + DirectByteBufferImpl(Object owner, RawData address, + int capacity, int limit, + int position) + { + super(capacity, limit, position, -1, address, null, 0); + this.owner = owner; + } + + /** + * Allocates a new direct byte buffer. + */ + public static ByteBuffer allocate(int capacity) + { + return new DirectByteBufferImpl.ReadWrite(capacity); + } + + protected void finalize() throws Throwable + { + if (owner == this) + VMDirectByteBuffer.free(address); + } + + public byte get() + { + checkForUnderflow(); + + int pos = position(); + byte result = VMDirectByteBuffer.get(address, pos); + position(pos + 1); + return result; + } + + public byte get(int index) + { + checkIndex(index); + + return VMDirectByteBuffer.get(address, index); + } + + public ByteBuffer get(byte[] dst, int offset, int length) + { + checkArraySize(dst.length, offset, length); + checkForUnderflow(length); + + int index = position(); + VMDirectByteBuffer.get(address, index, dst, offset, length); + position(index+length); + + return this; + } + + public ByteBuffer put(byte value) + { + checkForOverflow(); + + int pos = position(); + VMDirectByteBuffer.put(address, pos, value); + position(pos + 1); + return this; + } + + public ByteBuffer put(int index, byte value) + { + checkIndex(index); + + VMDirectByteBuffer.put(address, index, value); + return this; + } + + void shiftDown(int dst_offset, int src_offset, int count) + { + VMDirectByteBuffer.shiftDown(address, dst_offset, src_offset, count); + } + + public ByteBuffer compact() + { + checkIfReadOnly(); + mark = -1; + int pos = position(); + if (pos > 0) + { + int count = remaining(); + VMDirectByteBuffer.shiftDown(address, 0, pos, count); + position(count); + limit(capacity()); + } + else + { + position(limit()); + limit(capacity()); + } + return this; + } + + public ByteBuffer slice() + { + int rem = remaining(); + if (isReadOnly()) + return new DirectByteBufferImpl.ReadOnly + (owner, VMDirectByteBuffer.adjustAddress(address, position()), + rem, rem, 0); + else + return new DirectByteBufferImpl.ReadWrite + (owner, VMDirectByteBuffer.adjustAddress(address, position()), + rem, rem, 0); + } + + private ByteBuffer duplicate(boolean readOnly) + { + int pos = position(); + reset(); + int mark = position(); + position(pos); + DirectByteBufferImpl result; + if (readOnly) + result = new DirectByteBufferImpl.ReadOnly(owner, address, capacity(), + limit(), pos); + else + result = new DirectByteBufferImpl.ReadWrite(owner, address, capacity(), + limit(), pos); + + if (mark != pos) + { + result.position(mark); + result.mark(); + result.position(pos); + } + return result; + } + + public ByteBuffer duplicate() + { + return duplicate(isReadOnly()); + } + + public ByteBuffer asReadOnlyBuffer() + { + return duplicate(true); + } + + public boolean isDirect() + { + return true; + } + + public CharBuffer asCharBuffer() + { + return new CharViewBufferImpl(this, remaining() >> 1); + } + + public ShortBuffer asShortBuffer() + { + return new ShortViewBufferImpl(this, remaining() >> 1); + } + + public IntBuffer asIntBuffer() + { + return new IntViewBufferImpl(this, remaining() >> 2); + } + + public LongBuffer asLongBuffer() + { + return new LongViewBufferImpl(this, remaining() >> 3); + } + + public FloatBuffer asFloatBuffer() + { + return new FloatViewBufferImpl(this, remaining() >> 2); + } + + public DoubleBuffer asDoubleBuffer() + { + return new DoubleViewBufferImpl(this, remaining() >> 3); + } + + public char getChar() + { + return ByteBufferHelper.getChar(this, order()); + } + + public ByteBuffer putChar(char value) + { + ByteBufferHelper.putChar(this, value, order()); + return this; + } + + public char getChar(int index) + { + return ByteBufferHelper.getChar(this, index, order()); + } + + public ByteBuffer putChar(int index, char value) + { + ByteBufferHelper.putChar(this, index, value, order()); + return this; + } + + public short getShort() + { + return ByteBufferHelper.getShort(this, order()); + } + + public ByteBuffer putShort(short value) + { + ByteBufferHelper.putShort(this, value, order()); + return this; + } + + public short getShort(int index) + { + return ByteBufferHelper.getShort(this, index, order()); + } + + public ByteBuffer putShort(int index, short value) + { + ByteBufferHelper.putShort(this, index, value, order()); + return this; + } + + public int getInt() + { + return ByteBufferHelper.getInt(this, order()); + } + + public ByteBuffer putInt(int value) + { + ByteBufferHelper.putInt(this, value, order()); + return this; + } + + public int getInt(int index) + { + return ByteBufferHelper.getInt(this, index, order()); + } + + public ByteBuffer putInt(int index, int value) + { + ByteBufferHelper.putInt(this, index, value, order()); + return this; + } + + public long getLong() + { + return ByteBufferHelper.getLong(this, order()); + } + + public ByteBuffer putLong(long value) + { + ByteBufferHelper.putLong(this, value, order()); + return this; + } + + public long getLong(int index) + { + return ByteBufferHelper.getLong(this, index, order()); + } + + public ByteBuffer putLong(int index, long value) + { + ByteBufferHelper.putLong(this, index, value, order()); + return this; + } + + public float getFloat() + { + return ByteBufferHelper.getFloat(this, order()); + } + + public ByteBuffer putFloat(float value) + { + ByteBufferHelper.putFloat(this, value, order()); + return this; + } + + public float getFloat(int index) + { + return ByteBufferHelper.getFloat(this, index, order()); + } + + public ByteBuffer putFloat(int index, float value) + { + ByteBufferHelper.putFloat(this, index, value, order()); + return this; + } + + public double getDouble() + { + return ByteBufferHelper.getDouble(this, order()); + } + + public ByteBuffer putDouble(double value) + { + ByteBufferHelper.putDouble(this, value, order()); + return this; + } + + public double getDouble(int index) + { + return ByteBufferHelper.getDouble(this, index, order()); + } + + public ByteBuffer putDouble(int index, double value) + { + ByteBufferHelper.putDouble(this, index, value, order()); + return this; + } +} -- cgit v1.2.3