/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (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.mozilla.org/NPL/
 *
 * 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.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

package com.netscape.nativejsengine;

public class JSRuntime
{
    public static final String NATIVE_LIBRARY_NAME     = "nativejsengine";
    public static final String NATIVE_JSD_LIBRARY_NAME = "jsd";

    public static final boolean ENABLE_DEBUGGING = true;
    public static final boolean NO_DEBUGGING     = false;

    private JSRuntime() {
        // empty
    }
    public static JSRuntime newRuntime(boolean enableDebugging) {
        JSRuntime runtime = new JSRuntime();
        if(enableDebugging && ! _jsdNativesLoaded) {
            System.loadLibrary(NATIVE_JSD_LIBRARY_NAME);
            _jsdNativesLoaded = true;
        }
        if(! runtime._init(enableDebugging))
            return null;
        return runtime;
    }

    static {
        System.loadLibrary(NATIVE_LIBRARY_NAME);
    }

    public boolean isValid() {
        return _nativeRuntime != 0;
    }

    // finalization not guaranteed to happen in right order - trust programmer
    public void destroy() {
        _exit();
        _nativeRuntime = 0;
    }

    long    getNativeRuntime() {return _nativeRuntime;}
    long    getNativeDebugSupport() {return _nativeDebugSupport;}

    private native boolean _init(boolean enableDebugging);
    private native void _exit();

    private long    _nativeRuntime;
    private long    _nativeDebugSupport;

    private static boolean _jsdNativesLoaded = false;
}