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/***** BEGIN LICENSE BLOCK *****
 * Version: CPL 1.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Common Public
 * License Version 1.0 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.eclipse.org/legal/cpl-v10.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * Copyright (C) 2010 Wayne Meissner
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
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package org.jruby.cext;

import org.jruby.RubyString;

/**
 * An {@link RString} is an object tied to a {@link RubyString} for synchronization
 * of the string value between C and Ruby.
 */
public final class RString extends Cleaner {
    
    private final long address;
    
    private RString(RubyString str, long address) {
        super(str);
        this.address = address;
    }

    static RString newRString(RubyString str, long address) {
        RString rstring = new RString(str, address);
        Cleaner.register(rstring);

        return rstring;
    }

    static RString valueOf(RubyString str) {
        RString rstring = str.getRString();
        if (rstring != null) {
            return rstring;
        }
        str.setRString(rstring = RString.newRString(str, Native.newRString()));

        return rstring;
    }

    final long address() {
        return address;
    }

    @Override
    void dispose() {
        Native.freeRString(address);
    }
}




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