1 /* PipeImpl.java --
2    Copyright (C) 2002, 2003, 2004, 2005  Free Software Foundation, Inc.
3 
4 This file is part of GNU Classpath.
5 
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10 
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 General Public License for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING.  If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA.
20 
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library.  Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25 
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module.  An independent module is a module which is not derived from
33 or based on this library.  If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so.  If you do not wish to do so, delete this
36 exception statement from your version. */
37 
38 package gnu.java.nio;
39 
40 
41 import java.io.IOException;
42 import java.nio.ByteBuffer;
43 import java.nio.channels.Pipe;
44 import java.nio.channels.spi.SelectorProvider;
45 
46 class PipeImpl extends Pipe
47 {
48   public static final class SourceChannelImpl extends Pipe.SourceChannel
49   {
50     private int native_fd;
51     private VMChannel vmch;
52 
SourceChannelImpl(SelectorProvider selectorProvider, int native_fd)53     public SourceChannelImpl (SelectorProvider selectorProvider,
54                               int native_fd)
55     {
56       super (selectorProvider);
57       this.native_fd = native_fd;
58       vmch = VMChannel.getVMChannel(this);
59     }
60 
implCloseSelectableChannel()61     protected final void implCloseSelectableChannel()
62       throws IOException
63     {
64       throw new Error ("Not implemented");
65     }
66 
implConfigureBlocking(boolean blocking)67     protected void implConfigureBlocking (boolean blocking)
68       throws IOException
69     {
70       vmch.setBlocking(blocking);
71     }
72 
read(ByteBuffer src)73     public final int read (ByteBuffer src)
74       throws IOException
75     {
76       return vmch.read(src);
77     }
78 
read(ByteBuffer[] srcs)79     public final long read (ByteBuffer[] srcs)
80       throws IOException
81     {
82       return vmch.readScattering(srcs, 0, srcs.length);
83     }
84 
read(ByteBuffer[] srcs, int offset, int len)85     public final synchronized long read (ByteBuffer[] srcs, int offset,
86 					 int len)
87       throws IOException
88     {
89       if (offset < 0
90 	  || offset > srcs.length
91 	  || len < 0
92 	  || len > srcs.length - offset)
93 	throw new IndexOutOfBoundsException();
94 
95       return vmch.readScattering(srcs, offset, len);
96     }
97 
getNativeFD()98     public final int getNativeFD()
99     {
100       return native_fd;
101     }
102   }
103 
104   public static final class SinkChannelImpl extends Pipe.SinkChannel
105   {
106     private int native_fd;
107     private VMChannel vmch;
108 
SinkChannelImpl(SelectorProvider selectorProvider, int native_fd)109     public SinkChannelImpl (SelectorProvider selectorProvider,
110                             int native_fd)
111     {
112       super (selectorProvider);
113       this.native_fd = native_fd;
114       vmch = VMChannel.getVMChannel(this);
115     }
116 
implCloseSelectableChannel()117     protected final void implCloseSelectableChannel()
118       throws IOException
119     {
120       throw new Error ("Not implemented");
121     }
122 
implConfigureBlocking(boolean blocking)123     protected final void implConfigureBlocking (boolean blocking)
124       throws IOException
125     {
126       vmch.setBlocking(blocking);
127     }
128 
write(ByteBuffer dst)129     public final int write (ByteBuffer dst)
130       throws IOException
131     {
132       return vmch.write(dst);
133     }
134 
write(ByteBuffer[] srcs)135     public final long write (ByteBuffer[] srcs)
136       throws IOException
137     {
138       return vmch.writeGathering(srcs, 0, srcs.length);
139     }
140 
write(ByteBuffer[] srcs, int offset, int len)141     public final synchronized long write (ByteBuffer[] srcs, int offset, int len)
142       throws IOException
143     {
144       if (offset < 0
145 	  || offset > srcs.length
146 	  || len < 0
147 	  || len > srcs.length - offset)
148 	throw new IndexOutOfBoundsException();
149 
150       return vmch.writeGathering(srcs, offset, len);
151     }
152 
getNativeFD()153     public final int getNativeFD()
154     {
155       return native_fd;
156     }
157   }
158 
159   private SinkChannelImpl sink;
160   private SourceChannelImpl source;
161 
PipeImpl(SelectorProvider provider)162   public PipeImpl (SelectorProvider provider)
163     throws IOException
164   {
165     super();
166     VMPipe.init (this, provider);
167   }
168 
sink()169   public Pipe.SinkChannel sink()
170   {
171     return sink;
172   }
173 
source()174   public Pipe.SourceChannel source()
175   {
176     return source;
177   }
178 }
179