segment.h

Go to the documentation of this file.

// See the end of this file for license information.

#ifndef TORSION_SEGMENT_H
#define TORSION_SEGMENT_H

#include "addrmap.h"
#include "array.h"
#include "blockmap.h"


class Segment_map : public Address_map {
public:
  void
  set_pages_count(unsigned segment, Size pages_count);

  Size
  get_pages_count(unsigned segment);

  bool
  is_segment_free(unsigned segment);
};


class Segment_header {
public:
  inline void*
  get_page_address(unsigned page_index) {
    return (void*)((unsigned*)this)[page_index];
  }

  inline void
  set_page_address(unsigned page_index, void* page_address) {
    ((unsigned*)this)[page_index] = (unsigned)page_address;
  }
};


class Segment {
public:
  Segment_header* header;   
  void* buffer;       
  unsigned first_block;     
  unsigned curr_page_block;   
  Size pages_count;     
  unsigned index;     

  void
  init(unsigned first_block, unsigned index);

  void
  alloc_buffers(Size segment_size_without_header);

  void
  free_buffers();

  void
  print();
};

#endif

/* Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 * 
 * This program 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 for more details (in the COPYING file).
 * 
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

---

Torsion Operating System, Copyright (C) 2000-2004 Dan Helfman