--- /dev/null
+/* FileChannelImpl.java --
+ Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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 gnu.java.nio;
+
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+
+/**
+ * @author Michael Koch
+ */
+public class FileLockImpl extends FileLock
+{
+ public FileLockImpl (FileChannel channel, long position, long size,
+ boolean shared)
+ {
+ super (channel, position, size, shared);
+ }
+
+ public boolean isValid ()
+ {
+ throw new Error ("Not implemented");
+ }
+
+ public void release ()
+ {
+ throw new Error ("Not implemented");
+ }
+}
--- /dev/null
+/* FileLock.java --
+ Copyright (C) 2002 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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.channels;
+
+import java.io.IOException;
+
+/**
+ * @since 1.4
+ */
+public abstract class FileLock
+{
+ FileChannel channel;
+ long position;
+ long size;
+ boolean shared;
+
+ /**
+ * Initializes the file lock.
+ *
+ * @exception IllegalArgumentException If the preconditions on the parameters do not hold
+ */
+ protected FileLock (FileChannel channel, long position, long size,
+ boolean shared)
+ {
+ if (position < 0 ||
+ size < 0)
+ throw new IllegalArgumentException ();
+
+ this.channel = channel;
+ this.position = position;
+ this.size = size;
+ this.shared = shared;
+ }
+
+ /**
+ * Tells whether or not this lock is valid.
+ */
+ public abstract boolean isValid();
+
+ /**
+ * Releases this lock.
+ *
+ * @exception IOException If an error occurs
+ * @exception ClosedChannelException If the locked channel is no longer open.
+ */
+ public abstract void release () throws IOException;
+
+ /**
+ * Returns the file channel upon whose file this lock is held.
+ */
+ public final FileChannel channel ()
+ {
+ return channel;
+ }
+
+ /**
+ * Tells whether this lock is shared.
+ */
+ public final boolean isShared ()
+ {
+ return shared;
+ }
+
+ /**
+ * Tells whether or not this lock overlaps the given lock range.
+ */
+ public final boolean overlaps (long position, long size)
+ {
+ if (position > this.position +this.size)
+ return false;
+
+ if (position + size < this.position)
+ return false;
+
+ return true;
+ }
+
+ /**
+ * Returns the position within the file of the first byte of the
+ * locked region.
+ */
+ public final long position ()
+ {
+ return position;
+ }
+
+ /**
+ * Returns the size of the locked region in bytes.
+ */
+ public final long size ()
+ {
+ return size;
+ }
+
+ /**
+ * Returns a string describing the range, type, and validity of this lock.
+ */
+ public final String toString ()
+ {
+ return "file-lock:pos=" + position + "size=" + size;
+ }
+}
projects / gcc.git / commitdiff