/*

 * 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

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package jdk.internal.net.rdma;

import java.io.IOException;

import java.nio.channels.spi.SelectorProvider;

import sun.nio.ch.PollSelectorImpl;

import sun.nio.ch.IOUtil;

/**

 * Selector implementation based on poll

 */

public class RdmaPollSelectorImpl extends PollSelectorImpl {

    private static final UnsupportedOperationException unsupported;

    private static final SelectorProvider checkSupported(SelectorProvider sp) {

        if (unsupported != null)

            throw new UnsupportedOperationException(unsupported.getMessage(),

                    unsupported);

        else

            return sp;

    }

    protected RdmaPollSelectorImpl(SelectorProvider sp) throws IOException {

        super(checkSupported(sp));

    }

    protected int poll(long pollAddress, int numfds, int timeout) {

        return poll0(pollAddress, numfds, timeout);

    }

    private static native int poll0(long pollAddress, int numfds, int timeout);

    static {

        java.security.AccessController.doPrivileged(

            new java.security.PrivilegedAction<>() {

                public Void run() {

                    System.loadLibrary("extnet");

                    return null;

                }

            });

        IOUtil.load();

        UnsupportedOperationException uoe = null;

        try {

            init();

        } catch (UnsupportedOperationException e) {

            uoe = e;

        }

        unsupported = uoe;

    }

    private static native void init() throws UnsupportedOperationException;

}