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// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id: z_zone.h 119 2005-09-22 12:58:46Z fraggle $
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// 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.
//
// 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.
//
// DESCRIPTION:
// Zone Memory Allocation, perhaps NeXT ObjectiveC inspired.
// Remark: this was the only stuff that, according
// to John Carmack, might have been useful for
// Quake.
//
//---------------------------------------------------------------------
#ifndef __Z_ZONE__
#define __Z_ZONE__
#include <stdio.h>
//
// ZONE MEMORY
// PU - purge tags.
// Tags < 100 are not overwritten until freed.
#define PU_STATIC 1 /* static entire execution time */
#define PU_SOUND 2 /* static while playing */
#define PU_MUSIC 3 /* static while playing */
#define PU_DAVE 4 /* anything else Dave wants static */
#define PU_FREE 5 /* a free block */
#define PU_LEVEL 50 /* static until level exited */
#define PU_LEVSPEC 51 /* a special thinker in a level */
// Tags >= 100 are purgable whenever needed.
#define PU_PURGELEVEL 100
#define PU_CACHE 101
void Z_Init (void);
void* Z_Malloc (int size, int tag, void *ptr);
void Z_Free (void *ptr);
void Z_FreeTags (int lowtag, int hightag);
void Z_DumpHeap (int lowtag, int hightag);
void Z_FileDumpHeap (FILE *f);
void Z_CheckHeap (void);
void Z_ChangeTag2 (void *ptr, int tag);
int Z_FreeMemory (void);
typedef struct memblock_s
{
int size; // including the header and possibly tiny fragments
void** user;
int tag; // PU_FREE if this is free
int id; // should be ZONEID
struct memblock_s* next;
struct memblock_s* prev;
} memblock_t;
//
// This is used to get the local FILE:LINE info from CPP
// prior to really call the function in question.
//
#define Z_ChangeTag(p,t) \
{ \
if (( (memblock_t *)( (byte *)(p) - sizeof(memblock_t)))->id!=0x1d4a11) \
I_Error("Z_CT at "__FILE__":%i",__LINE__); \
Z_ChangeTag2(p,t); \
};
#endif
//-----------------------------------------------------------------------------
//
// $Log$
// Revision 1.3 2005/09/22 12:58:46 fraggle
// Use a new PU_FREE tag to mark free blocks, rather than the 'user' field
// (avoids using magic numbers to mark allocated blocks with no user)
//
// Revision 1.2 2005/07/23 16:44:57 fraggle
// Update copyright to GNU GPL
//
// Revision 1.1.1.1 2005/07/23 16:19:55 fraggle
// Initial import
//
//
//-----------------------------------------------------------------------------
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