src/java.base/windows/native/libnet/TwoStacksPlainDatagramSocketImpl.c

rev 11363 : [mq]: 8072466-Deadlock-when-starting-MulticastSocket-and-DatagramSocket

*** 1,7 ****
  /*
!  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
--- 1,7 ----
  /*
!  * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
*** 2561,2565 ****
--- 2561,2606 ----
  Java_java_net_TwoStacksPlainDatagramSocketImpl_leave(JNIEnv *env, jobject this,
                                              jobject iaObj, jobject niObj)
  {
      mcast_join_leave (env, this, iaObj, niObj, JNI_FALSE);
  }
+ 
+ /*
+  * Class:     java_net_TwoStacksPlainDatagramSocketImpl
+  * Method:    dataAvailable
+  * Signature: ()I
+  */
+ JNIEXPORT jint JNICALL Java_java_net_TwoStacksPlainDatagramSocketImpl_dataAvailable
+ (JNIEnv *env, jobject this) {
+     SOCKET fd;
+     SOCKET fd1;
+     int  rv = -1, rv1 = -1;
+     jobject fdObj = (*env)->GetObjectField(env, this, pdsi_fdID);
+     jobject fd1Obj;
+ 
+     if (!IS_NULL(fdObj)) {
+         int retval = 0;
+         fd = (SOCKET)(*env)->GetIntField(env, fdObj, IO_fd_fdID);
+         rv = ioctlsocket(fd, FIONREAD, &retval);
+         if (retval > 0) {
+             return retval;
+         }
+     }
+ 
+     fd1Obj = (*env)->GetObjectField(env, this, pdsi_fd1ID);
+     if (!IS_NULL(fd1Obj)) {
+         int retval = 0;
+         fd1 = (SOCKET)(*env)->GetIntField(env, fd1Obj, IO_fd_fdID);
+         rv1 = ioctlsocket(fd1, FIONREAD, &retval);
+         if (retval > 0) {
+             return retval;
+         }
+     }
+ 
+     if (rv < 0 && rv1 < 0) {
+         JNU_ThrowByName(env, JNU_JAVANETPKG "SocketException",
+                             "Socket closed");
+         return -1;
+     }
+ 
+     return 0;
+ }