Implemented missing native methods for Loom support

src/java.base/solaris/classes/sun/nio/ch/DefaultPollerProvider.java

@@ -34,11 +34,11 @@ class DefaultPollerProvider extends PollerProvider {
 
     @Override
     Poller readPoller() throws IOException {
-        return new DevPollPoller(true);
+        return new SolarisEventPortPoller(true);
     }
 
     @Override
     Poller writePoller() throws IOException {
-        return new DevPollPoller(false);
+        return new SolarisEventPortPoller(false);
     }
 }

src/java.base/solaris/classes/sun/nio/ch/SolarisEventPort.java

@@ -63,6 +63,10 @@ private static int dependsArch(int value32, int value64) {
     static final short PORT_SOURCE_USER     = 3;
     static final short PORT_SOURCE_FD       = 4;
 
+    // events (sys/poll.h)
+    static final int POLLIN  = 0x0001;
+    static final int POLLOUT = 0x0004;
+
     // file descriptor to event port.
     private final int port;
 
@@ -246,7 +250,8 @@ static native boolean port_dissociate(int port, int source, long object)
     static native int port_get(int port, long address) throws IOException;
 
     /**
-     * Retrieves at most {@code max} events from a port.
+     * Retrieves at most {@code max} events from a port. A time-out of {@code < 0} means
+     * never time-out.
      */
     static native int port_getn(int port, long address, int max, long timeout)
         throws IOException;

src/java.base/solaris/classes/sun/nio/ch/SolarisEventPortPoller.java

@@ -0,0 +1,103 @@
+/*
+* Copyright (c) 2008, 2020, 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
+* particular file as subject to the "Classpath" exception as provided
+* by Oracle in the LICENSE file that accompanied this code.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+* or visit www.oracle.com if you need additional information or have any
+* questions.
+*/
+
+package sun.nio.ch;
+
+import java.io.IOException;
+import jdk.internal.misc.Unsafe;
+
+import static sun.nio.ch.SolarisEventPort.OFFSETOF_OBJECT;
+import static sun.nio.ch.SolarisEventPort.POLLIN;
+import static sun.nio.ch.SolarisEventPort.POLLOUT;
+import static sun.nio.ch.SolarisEventPort.PORT_SOURCE_FD;
+import static sun.nio.ch.SolarisEventPort.SIZEOF_PORT_EVENT;
+
+class SolarisEventPortPoller extends Poller {
+
+    private static final Unsafe unsafe = Unsafe.getUnsafe();
+
+    private static final int MAX_EVENTS = 512;
+
+    // File descriptor to event port.
+    private final int epid;
+    private final int event;
+
+    // the poll array (populated by port_getn)
+    private final long pollArrayAddress;
+    private final AllocatedNativeObject pollArray;
+
+    SolarisEventPortPoller(boolean read) throws IOException {
+        super(read);
+        this.epid = SolarisEventPort.port_create();
+        this.event = (read) ? POLLIN : POLLOUT;
+
+        int allocationSize = MAX_EVENTS * SIZEOF_PORT_EVENT;
+        this.pollArray = new AllocatedNativeObject(allocationSize, false);
+        this.pollArrayAddress = pollArray.address();
+    }
+
+    @Override
+    int fdVal() {
+        return epid;
+    }
+
+    @Override
+    void implRegister(int fdVal) throws IOException {
+        boolean result = SolarisEventPort.port_associate(epid, PORT_SOURCE_FD, fdVal, event);
+        // 'SolarisEventPort.c' will already throw an IOException if the native 'port_associate' method returns
+        // an error code which is not 'EBADFD'.
+        if (!result) {
+            throw new IOException("Event ports 'port_associate' call failed. Error code: " + result);
+        }
+    }
+
+    @Override
+    void implDeregister(int fdVal) {
+        try{
+            SolarisEventPort.port_dissociate(epid, PORT_SOURCE_FD, fdVal);
+        } catch (IOException e) {
+            // Ignore.
+        }
+    }
+
+    @Override
+    int poll(int timeout) throws IOException {
+        int numEvents = SolarisEventPort.port_getn(epid, pollArrayAddress, MAX_EVENTS, timeout);
+        if (numEvents < 0) {
+            throw new IOException("Event ports 'port_getn' call failed. Error code: " + numEvents);
+        }
+
+        int i = 0;
+        while (i < numEvents) {
+            long eventAddress = pollArrayAddress + (SIZEOF_PORT_EVENT * i);
+            // pe->portev_object is file descriptor
+            int fdVal = (int)unsafe.getAddress(eventAddress + OFFSETOF_OBJECT);
+            polled(fdVal);
+            i++;
+        }
+
+        return numEvents;
+    }
+}