/*

 * 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 jdk.vm.ci.code;

/**

 * Represents a compiled instance of a method. It may have been invalidated or removed in the

 * meantime.

 */

public class InstalledCode {

    /**

     * Raw address address of entity representing this installed code.

     */

    protected long address;

    /**

     * Raw address of entryPoint of this installed code.

     */

    protected long entryPoint;

    /**

     * Counts how often the address field was reassigned.

     */

    protected long version;

    protected final String name;

    public InstalledCode(String name) {

        this.name = name;

    }

    /**

     * @return the address of entity representing this installed code.

     */

        return address;

    }

    /**

     * @return the address of the normal entry point of the installed code.

     */

        return entryPoint;

    }

    /**

     * @return the version number of this installed code

     */

    public final long getVersion() {

        return version;

    }

    /**

     * Returns the name of this installed code.

     */

    public String getName() {

        return name;

    }

    /**

     * Returns the start address of this installed code if it is {@linkplain #isValid() valid}, 0

     * otherwise.

     */

    public long getStart() {

        return 0;

    }

    /**

     * @return true if the code represented by this object is still valid for invocation, false

     *         otherwise (may happen due to deopt, etc.)

     */

    public boolean isValid() {

        return entryPoint != 0;

    }

    /**

     * @return true if the code represented by this object still exists and might have live

     *         activations, false otherwise (may happen due to deopt, etc.)

     */

    public boolean isAlive() {

        return address != 0;

    }

    /**

     * Returns a copy of this installed code if it is {@linkplain #isValid() valid}, null otherwise.

     */

    public byte[] getCode() {

        return null;

    }

    /**

     * Invalidates this installed code such that any subsequent

     * {@linkplain #executeVarargs(Object...) invocation} will throw an

     * {@link InvalidInstalledCodeException} and all existing invocations will be deoptimized.

     */

    public void invalidate() {

        throw new UnsupportedOperationException();

    }

    /**

     * Executes the installed code with a variable number of arguments.

     *

     * @param args the array of object arguments

     * @return the value returned by the executed code

     */

    @SuppressWarnings("unused")

    public Object executeVarargs(Object... args) throws InvalidInstalledCodeException {

        throw new UnsupportedOperationException();

    }

}