/*
 * Copyright (c) 2012, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
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 * questions.
 */
package com.oracle.truffle.api;

import com.oracle.truffle.api.frame.*;
import com.oracle.truffle.api.nodes.*;

/**
 * Interface representing a Truffle runtime object. The runtime is responsible for creating call
 * targets and performing optimizations for them.
 */
public interface TruffleRuntime {

    /**
     * Name describing this runtime implementation for debugging purposes.
     * 
     * @return the name as a String
     */
    String getName();

    /**
     * Creates a new call target for a given root node.
     * 
     * @param rootNode the root node whose
     *            {@link RootNode#execute(com.oracle.truffle.api.frame.VirtualFrame)} method
     *            represents the entry point
     * @return the new call target object
     */
    CallTarget createCallTarget(RootNode rootNode);

    /**
     * Creates a new assumption object that can be checked and invalidated.
     * 
     * @return the newly created assumption object
     */
    Assumption createAssumption();

    /**
     * Creates a new assumption object with a given name that can be checked and invalidated.
     * 
     * @param name the name for the new assumption
     * @return the newly created assumption object
     */
    Assumption createAssumption(String name);

    /**
     * Creates a new virtual frame object that can be used to store values and is potentially
     * optimizable by the runtime.
     * 
     * @return the newly created virtual frame object
     */
    VirtualFrame createVirtualFrame(PackedFrame caller, Arguments arguments, FrameDescriptor frameDescriptor);

    /**
     * Creates a new materialized frame object that can be used to store values.
     * 
     * @return the newly created materialized frame object
     */
    MaterializedFrame createMaterializedFrame(Arguments arguments);

    /**
     * Creates a new materialized frame object with the given frame descriptor that can be used to
     * store values.
     * 
     * @param frameDescriptor the frame descriptor describing this frame's values
     * @return the newly created materialized frame object
     */
    MaterializedFrame createMaterializedFrame(Arguments arguments, FrameDescriptor frameDescriptor);
}