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 */
013package org.vmmagic.pragma;
014
015import java.lang.annotation.Retention;
016import java.lang.annotation.Target;
017import java.lang.annotation.RetentionPolicy;
018import java.lang.annotation.ElementType;
019import org.vmmagic.Pragma;
020
021/**
022 * When applied to class this annotation indicates that the data component
023 * of this field consists of an intrinsically managed chunk of raw memory of
024 * the specified size. This is used as the basic building block for native
025 * width types.<p>
026 *
027 * To construct types larger than those possible with RawStorage, simply
028 * construct an type with multiple (Unboxed) fields.
029 */
030@Retention(RetentionPolicy.RUNTIME)
031@Target({ElementType.TYPE})
032@Pragma
033public @interface RawStorage {
034  boolean lengthInWords();
035  int length();
036}