1 /* 2 * Copyright (c) 2000, 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 rdma.ch; 27 28 import java.io.FileDescriptor; 29 import java.io.IOException; 30 import sun.nio.ch.IOUtil; 31 32 import jdk.internal.misc.JavaIOFileDescriptorAccess; 33 import jdk.internal.misc.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 protected void preClose(FileDescriptor fd) throws IOException { 60 preClose0(fd); 61 } 62 63 // -- Native methods -- 64 65 static native int read0(FileDescriptor fd, long address, int len) 66 throws IOException; 67 68 static native long readv0(FileDescriptor fd, long address, int len) 69 throws IOException; 70 71 static native int write0(FileDescriptor fd, long address, int len) 72 throws IOException; 73 74 static native long writev0(FileDescriptor fd, long address, int len) 75 throws IOException; 76 77 static native void close0(FileDescriptor fd) throws IOException; 78 79 static native void preClose0(FileDescriptor fd) throws IOException; 80 81 static native void init(); 82 }