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/*
* mpl.h
*
* $Id: mpl.h,v 1.1.1.1 2006/04/11 17:56:16 source Exp $
*
* Mempory Pool Primitives
* Derived from obstack
*
* This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
* project.
*
* Copyright (C) 1998-2006 OpenLink Software
*
* This project 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; only version 2 of the License, dated June 1991.
*
* 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.
*
* 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*
*/
#ifndef _MPL_H
#define _MPL_H
/*
* Since DOS has segmented memory, we use normalized
* character pointers in some critical parts. (mpl_..)
* These pointers are memptr_t type.
*/
#if !defined(__COMPACT__) && !defined(__LARGE__) && !defined(__HUGE__)
typedef char *memptr_t;
#else
typedef char huge *memptr_t;
#endif
typedef ptr_long memdf_t; /* Type for pointer difference */
typedef ptr_ulong memsz_t; /* Type for memory size */
#define MPL_CHUNK_SIZE 4096
typedef struct mpc /* Lives at front of each chunk. */
{
struct mpc *mc_prev; /* address of prior chunk or NULL */
memptr_t mc_limit; /* size of chunk */
} MPC;
typedef struct /* control current object in current chunk */
{
MPC *mp_chunk; /* address of current MPL_chunk */
memptr_t mp_base; /* address of object we are building */
memptr_t mp_next; /* where to add next char to current object */
memptr_t mp_limit; /* address of char after current chunk */
} MPL;
#define mpl_1grow(mp, c) \
((((mp)->mp_next >= (mp)->mp_limit) ? (mpl_newchunk(mp, 1), 0) : 0),\
*((mp)->mp_next)++ = (c))
BEGIN_CPLUSPLUS
memptr_t getcore (memsz_t size);
void freecore (memptr_t mem);
void mpl_newchunk (MPL * mp, memsz_t length);
void mpl_init (MPL * mp);
void mpl_destroy (MPL * mp);
void mpl_free (MPL * mp, memptr_t ptr);
memsz_t mpl_object_size (MPL * mp);
memptr_t mpl_alloc (MPL * mp, memsz_t size);
memptr_t mpl_finish (MPL * mp);
memptr_t mpl_finish2 (MPL * mp, memsz_t *size);
memptr_t mpl_getmem (MPL * mp, memsz_t size);
memptr_t mpl_grow (MPL * mp, memptr_t addr, memsz_t len);
END_CPLUSPLUS
#endif
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