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 package jdk.internal.net.rdma; 26 27 import java.io.IOException; 28 import java.nio.channels.spi.SelectorProvider; 29 import sun.nio.ch.PollSelectorImpl; 30 import sun.nio.ch.IOUtil; 31 32 /** 33 * Selector implementation based on poll 34 */ 35 36 public class RdmaPollSelectorImpl extends PollSelectorImpl { 37 38 private static final UnsupportedOperationException unsupported; 39 40 private static final SelectorProvider checkSupported(SelectorProvider sp) { 41 if (unsupported != null) 42 throw new UnsupportedOperationException(unsupported.getMessage(), unsupported); 43 else 44 return sp; 45 } 46 47 protected RdmaPollSelectorImpl(SelectorProvider sp) throws IOException { 48 super(checkSupported(sp)); 49 } 50 51 protected int poll(long pollAddress, int numfds, int timeout) { 52 return poll0(pollAddress, numfds, timeout); 53 } 54 55 private static native int poll0(long pollAddress, int numfds, int timeout); 56 57 static { 58 java.security.AccessController.doPrivileged( 59 new java.security.PrivilegedAction<>() { 60 public Void run() { 61 System.loadLibrary("extnet"); 62 return null; 63 } 64 }); 65 IOUtil.load(); 66 UnsupportedOperationException uoe = null; 67 try { 68 init(); 69 } catch (UnsupportedOperationException e) { 70 uoe = e; 71 } 72 unsupported = uoe; 73 } 74 75 private static native void init() throws UnsupportedOperationException; 76 }