/*

 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.

 * Copyright 2008, 2009, 2010 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 *

 */

#ifndef CPU_ZERO_ENTRY_ZERO_HPP

#define CPU_ZERO_ENTRY_ZERO_HPP

#include "interpreter/cppInterpreter.hpp"

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 int (*NormalEntryFunc)(Method* method,

                                 intptr_t  base_pc,

                                 TRAPS);

  typedef int (*OSREntryFunc)(Method* method,

                              address   osr_buf,

                              intptr_t  base_pc,

                              TRAPS);

 public:

  void invoke(Method* method, TRAPS) const {

    maybe_deoptimize(

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

      THREAD);

  }

  void invoke_osr(Method* method, address osr_buf, TRAPS) const {

    maybe_deoptimize(

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

      THREAD);

  }

 private:

  static void maybe_deoptimize(int deoptimized_frames, TRAPS) {

    if (deoptimized_frames)

      CppInterpreter::main_loop(deoptimized_frames - 1, THREAD);

  }

 public:

  static ByteSize entry_point_offset() {

    return byte_offset_of(ZeroEntry, _entry_point);

  }

};

#endif // CPU_ZERO_ENTRY_ZERO_HPP