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 #include <Rsocket.h>
  27 #include "jni_util.h"
  28 #include "jvm.h"
  29 #include "nio.h"
  30 #include "jdk_internal_net_rdma_RdmaPollSelectorImpl.h"
  31 
  32 JNIEXPORT void JNICALL
  33 Java_jdk_internal_net_rdma_RdmaPollSelectorImpl_init(JNIEnv *env,
  34         jclass clazz) {
  35     loadRdmaFuncs(env);
  36 }
  37 
  38 JNIEXPORT jint JNICALL
  39 Java_jdk_internal_net_rdma_RdmaPollSelectorImpl_poll0(JNIEnv *env,
  40         jclass clazz, jlong address, jint numfds, jint timeout) {
  41     struct pollfd *a;
  42     int res;
  43 
  44     a = (struct pollfd *) jlong_to_ptr(address);
  45     res = rs_poll(a, numfds, timeout);
  46     if (res < 0) {
  47         if (errno == EINTR) {
  48             return IOS_INTERRUPTED;
  49         } else {
  50             JNU_ThrowIOExceptionWithLastError(env, "poll failed");
  51             return IOS_THROWN;
  52         }
  53     }
  54     return (jint) res;
  55 }