001    /*
002     *  This file is part of the Jikes RVM project (http://jikesrvm.org).
003     *
004     *  This file is licensed to You under the Eclipse Public License (EPL);
005     *  You may not use this file except in compliance with the License. You
006     *  may obtain a copy of the License at
007     *
008     *      http://www.opensource.org/licenses/eclipse-1.0.php
009     *
010     *  See the COPYRIGHT.txt file distributed with this work for information
011     *  regarding copyright ownership.
012     */
013    package org.vmmagic.pragma;
014    
015    import java.lang.annotation.Retention;
016    import java.lang.annotation.RetentionPolicy;
017    import java.lang.annotation.Target;
018    import java.lang.annotation.ElementType;
019    import org.vmmagic.Pragma;
020    
021    /**
022     * Methods of a class that implements this interface are treated specially
023     * by the compilers:
024     * <ul>
025     *  <li>They are only called from C or C++ program</li>
026     *  <li>The compiler will generate the necessary prolog to insert a glue stack
027     *   frame to map from the native stack/register convention to RVM's convention</li>
028     *  <li>It is an error to call these methods from Java</li>
029     * </ul>
030     */
031    @Retention(RetentionPolicy.RUNTIME)
032    @Target(ElementType.TYPE)
033    @Pragma
034    public @interface NativeBridge { }