src/share/classes/sun/nio/ch/FileDispatcher.java

*** 1,7 ****
  /*
!  * Copyright (c) 2007, 2010, 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
--- 1,7 ----
  /*
!  * Copyright (c) 2007, 2018, 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
*** 38,47 ****
--- 38,49 ----
  
      abstract int force(FileDescriptor fd, boolean metaData) throws IOException;
  
      abstract int truncate(FileDescriptor fd, long size) throws IOException;
  
+     abstract int allocate(FileDescriptor fd, long size) throws IOException;
+ 
      abstract long size(FileDescriptor fd) throws IOException;
  
      abstract int lock(FileDescriptor fd, boolean blocking, long pos, long size,
                         boolean shared) throws IOException;