/*

 * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.

 * Copyright 2008, 2009 Red Hat, Inc.

 * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 *

 */

class ZeroEntry {

 public:

  ZeroEntry() {

    ShouldNotCallThis();

  }

 private:

  address _entry_point;

 public:

  address entry_point() const {

    return _entry_point;

  }

  void set_entry_point(address entry_point) {

    _entry_point = entry_point;

  }

 private:

  typedef void (*NormalEntryFunc)(methodOop method,

                                  intptr_t  base_pc,

                                  TRAPS);

  typedef void (*OSREntryFunc)(methodOop method,

                               address   osr_buf,

                               intptr_t  base_pc,

                               TRAPS);

 public:

  void invoke(methodOop method, TRAPS) const {

    ((NormalEntryFunc) entry_point())(method, (intptr_t) this, THREAD);

  }

  void invoke_osr(methodOop method, address osr_buf, TRAPS) const {

    ((OSREntryFunc) entry_point())(method, osr_buf, (intptr_t) this, THREAD);

  }

 public:

  static ByteSize entry_point_offset() {

    return byte_offset_of(ZeroEntry, _entry_point);

  }

};