+
+ Seekable.Lock _lockFile(Seekable s, RandomAccessFile r, long pos, long size, boolean shared) throws IOException {
+ FileLock flock;
+ try {
+ flock = pos == 0 && size == 0 ? r.getChannel().lock() :
+ r.getChannel().tryLock(pos, size, shared);
+ } catch (OverlappingFileLockException e) { flock = null; }
+ if (flock == null) return null; // region already locked
+ return new Jdk14FileLock(s, flock);
+ }
+ }
+
+ private static final class Jdk14FileLock extends Seekable.Lock {
+ private final Seekable s;
+ private final FileLock l;
+
+ Jdk14FileLock(Seekable sk, FileLock flock) { s = sk; l = flock; }
+ public Seekable seekable() { return s; }
+ public boolean isShared() { return l.isShared(); }
+ public boolean isValid() { return l.isValid(); }
+ public void release() throws IOException { l.release(); }
+ public long position() { return l.position(); }
+ public long size() { return l.size(); }
+ public String toString() { return l.toString(); }