/*

 * Copyright (c) 2016, 2018, 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

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 */

#ifndef SHARE_VM_JFR_WRITERS_JFRPOSITION_HPP

#define SHARE_VM_JFR_WRITERS_JFRPOSITION_HPP

#include "utilities/debug.hpp"

#include "utilities/globalDefinitions.hpp"

template <typename AP> // AllocationPolicy

class Position : public AP {

 private:

  const u1* _start_pos; // logical start

  u1* _current_pos;

  const u1* _end_pos;

 protected:

  const u1* start_pos() const;

  void set_start_pos(const u1* position);

  u1* current_pos();

  void set_current_pos(const u1* new_position);

  void set_current_pos(size_t size);

  const u1* end_pos() const;

  void set_end_pos(const u1* position);

  Position(const u1* start_pos, size_t size);

  Position();

 public:

  size_t available_size() const;

  intptr_t used_offset() const;

  intptr_t current_offset() const;

  size_t used_size() const;

  void reset();

};

#endif // SHARE_VM_JFR_WRITERS_JFRPOSITION_HPP