/*
Copyright (C) 1994-1995  Apogee Software, Ltd.
Copyright (C) 2002-2015  icculus.org, GNU/Linux port
Copyright (C) 2017-2018  Steven LeVesque

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.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef _z_zone_private
#define _z_zone_private

#include "develop.h"

#define MINFRAGMENT     64
#define DPMI_INT  0x31
#define MAXMEMORYSIZE   900000000

#define LEVELZONESIZE   250000

// memory storage data types

#define MEMORYPRETAG   (0x1a2b3c4d)
#define MEMORYPOSTTAG  (0x9f8e7d6b)

typedef struct memblock_s
{
    int     size;   // including the header and possibly tiny fragments
    void    **user; // NULL if a free block
    int     tag;    // purgelevel
    struct memblock_s   *next, *prev;
} memblock_t;

typedef struct
{
    int     size;          // total bytes malloced, including header
    memblock_t  blocklist; // start / end cap for linked list
    memblock_t  *rover;
} memzone_t;

#endif
