/*
 * Copyright (c) 2007, 2018, 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 rdma.ch;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.SocketException;
import java.net.InetAddress;
import java.net.SocketImpl;
import sun.net.ext.RdmaSocketOptions;
import rdma.ch.RdmaSocketImpl.PlatformRdmaSocketImpl;

class LinuxRdmaSocketImpl extends PlatformRdmaSocketImpl
{
    static {
        java.security.AccessController.doPrivileged(
            new java.security.PrivilegedAction<>() {
                public Void run() {
                    System.loadLibrary("net");
                    System.loadLibrary("extnet");
                    return null;
                }
            });
        initProto();
    }

    public LinuxRdmaSocketImpl() { }

    static final RdmaSocketOptions rdmaOptions =
            RdmaSocketOptions.getInstance();

    private static volatile boolean checkedRdma;
    private static volatile boolean isRdmaAvailable;

    boolean isRdmaAvailable() {
        if (!checkedRdma) {
            isRdmaAvailable = isRdmaAvailable0();
            checkedRdma = true;
        }
        return isRdmaAvailable;
    }

    protected synchronized RdmaSocketInputStream getRdmaInputStream(
            RdmaSocketImpl impl) throws IOException {
        return new RdmaSocketInputStream(impl);
    }

    protected synchronized RdmaSocketOutputStream getRdmaOutputStream(
            RdmaSocketImpl impl) throws IOException {
        return new RdmaSocketOutputStream(impl);
    }

    protected void rdmaSocketShutdownInput(int howto, RdmaSocketImpl impl,
            InputStream socketInputStream) throws IOException {
        rdmaSocketShutdown(howto, impl);
        if (socketInputStream != null) {
            ((RdmaSocketInputStream)socketInputStream).setEOF(true);
        }
    }

    static native void initProto();

    private static native boolean isRdmaAvailable0();

    native void rdmaSocketCreate(boolean isServer, RdmaSocketImpl impl) throws IOException;

    native void rdmaSocketConnect(RdmaSocketImpl impl, InetAddress address, int port, int timeout)
        throws IOException;

    native void rdmaSocketBind(RdmaSocketImpl impl, InetAddress address, int port)
        throws IOException;

    native void rdmaSocketListen(RdmaSocketImpl impl, int count) throws IOException;

    native void rdmaSocketAccept(SocketImpl impl, RdmaSocketImpl s) throws IOException;

    native int rdmaSocketAvailable(RdmaSocketImpl impl) throws IOException;

    native void rdmaSocketClose(boolean useDeferredClose, RdmaSocketImpl impl) throws IOException;

    native void rdmaSocketShutdown(int howto, RdmaSocketImpl impl) throws IOException;

    native void rdmaSocketSetOption(RdmaSocketImpl impl, int cmd, boolean on, Object value)
        throws SocketException;

    native int rdmaSocketGetOption(RdmaSocketImpl impl, int opt, Object iaContainerObj) throws SocketException;

    native void rdmaSocketSendUrgentData(RdmaSocketImpl impl, int data) throws IOException;
}