/*
 * Copyright (c) 2013, 2015, 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.
 *
 * 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 org.graalvm.compiler.nodes.memory;

/**
 * Encapsulates properties of a node describing how it accesses the heap.
 */
public interface HeapAccess {

    /**
     * The types of (write/read) barriers attached to stores.
     */
    enum BarrierType {
        /**
         * Primitive stores which do not necessitate barriers.
         */
        NONE,
        /**
         * Array object stores which necessitate precise barriers.
         */
        PRECISE,
        /**
         * Field object stores which necessitate imprecise barriers.
         */
        IMPRECISE
    }

    /**
     * Gets the write barrier type for that particular access.
     */
    BarrierType getBarrierType();
}