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.internal.net.rdma;
  27 
  28 import java.io.FileDescriptor;
  29 import java.io.IOException;
  30 import sun.nio.ch.IOUtil;
  31 
  32 import jdk.internal.access.JavaIOFileDescriptorAccess;
  33 import jdk.internal.access.SharedSecrets;
  34 
  35 public class LinuxRdmaSocketDispatcherImpl {
  36 
  37     static {
  38         java.security.AccessController.doPrivileged(
  39                 new java.security.PrivilegedAction<Void>() {
  40                     public Void run() {
  41                         System.loadLibrary("extnet");
  42                         return null;
  43                     }
  44                 });
  45         IOUtil.load();
  46         init();
  47     }
  48 
  49     private static final JavaIOFileDescriptorAccess fdAccess =
  50             SharedSecrets.getJavaIOFileDescriptorAccess();
  51 
  52         LinuxRdmaSocketDispatcherImpl() {
  53     }
  54 
  55     protected void close(FileDescriptor fd) throws IOException {
  56         fdAccess.close(fd);
  57     }
  58 
  59     // -- Native methods --
  60 
  61     static native int read0(FileDescriptor fd, long address, int len)
  62             throws IOException;
  63 
  64     static native long readv0(FileDescriptor fd, long address, int len)
  65             throws IOException;
  66 
  67     static native int write0(FileDescriptor fd, long address, int len)
  68             throws IOException;
  69 
  70     static native long writev0(FileDescriptor fd, long address, int len)
  71             throws IOException;
  72 
  73     static native void close0(FileDescriptor fd) throws IOException;
  74 
  75     static native void init();
  76 }