1 /*
   2  * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.net;
  27 
  28 import java.net.SocketException;
  29 import jdk.net.RdmaSocketOptions.PlatformRdmaSocketOptions;
  30 
  31 class LinuxRdmaSocketOptions extends PlatformRdmaSocketOptions {
  32 
  33     private static final UnsupportedOperationException unsupported;
  34 
  35     private static final Void checkSupported() {
  36         if (unsupported != null)
  37             throw new UnsupportedOperationException(unsupported.getMessage(), unsupported);
  38         else
  39             return null;
  40     }
  41 
  42     public LinuxRdmaSocketOptions() {
  43         this(checkSupported());
  44     }
  45 
  46     private LinuxRdmaSocketOptions(Void unused) { }
  47 
  48     @Override native void setSockOpt(int fd, int opt, int value)
  49             throws SocketException;
  50 
  51     @Override native int getSockOpt(int fd, int opt)
  52             throws SocketException;
  53 
  54     @Override native boolean rdmaSocketSupported();
  55 
  56     static {
  57         java.security.AccessController.doPrivileged(
  58             new java.security.PrivilegedAction<>() {
  59                 public Void run() {
  60                     System.loadLibrary("extnet");
  61                     return null;
  62                 }
  63             });
  64         UnsupportedOperationException uoe = null;
  65         try {
  66             init();
  67         } catch (UnsupportedOperationException e) {
  68             uoe = e;
  69         }
  70         unsupported = uoe;
  71     }
  72 
  73     private static native void init() throws UnsupportedOperationException;
  74 }