fteqw/engine/common/zone.h

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/*
Copyright (C) 1996-1997 Id Software, Inc.
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.
*/
/*
memory allocation
H_??? The hunk manages the entire memory block given to quake. It must be
contiguous. Memory can be allocated from either the low or high end in a
stack fashion. The only way memory is released is by resetting one of the
pointers.
Hunk allocations should be given a name, so the Hunk_Print () function
can display usage.
Hunk allocations are guaranteed to be 16 byte aligned.
The video buffers are allocated high to avoid leaving a hole underneath
server allocations when changing to a higher video mode.
Z_??? Zone memory functions used for small, dynamic allocations like text
strings from command input. There is only about 48K for it, allocated at
the very bottom of the hunk.
Cache_??? Cache memory is for objects that can be dynamically loaded and
can usefully stay persistant between levels. The size of the cache
fluctuates from level to level.
To allocate a cachable object
Temp_??? Temp memory is used for file loading and surface caching. The size
of the cache memory is adjusted so that there is a minimum of 512k remaining
for temp memory.
------ Top of Memory -------
high hunk allocations
<--- high hunk reset point held by vid
video buffer
z buffer
surface cache
<--- high hunk used
cachable memory
<--- low hunk used
client and server low hunk allocations
<-- low hunk reset point held by host
startup hunk allocations
Zone block
----- Bottom of Memory -----
*/
void Memory_Init (void *buf, int size);
void Memory_DeInit(void);
void VARGS Z_Free (void *ptr);
void *Z_Malloc (int size); // returns 0 filled memory
void *ZF_Malloc (int size); // allowed to fail
void *Z_MallocNamed (int size, char *file, int line); // returns 0 filled memory
void *ZF_MallocNamed (int size, char *file, int line); // allowed to fail
//#define Z_Malloc(x) Z_MallocNamed2(x, __FILE__, __LINE__ )
void *VARGS Z_TagMalloc (int size, int tag);
void VARGS Z_TagFree(void *ptr);
void VARGS Z_FreeTags(int tag);
//void *Z_Realloc (void *ptr, int size);
//Big Zone: allowed to fail, doesn't clear. The expectation is a large file, rather than sensative data structures.
//(this is a nicer name for malloc)
void *BZ_Malloc(int size);
void *BZF_Malloc(int size);
void *BZ_MallocNamed (int size, char *file, int line); // returns 0 filled memory
void *BZF_MallocNamed (int size, char *file, int line); // allowed to fail
void *BZ_Realloc(void *ptr, int size);
void *BZ_ReallocNamed(void *data, int newsize, char *file, int line);
void *BZF_Realloc(void *data, int newsize);
void *BZF_ReallocNamed(void *data, int newsize, char *file, int line);
void BZ_Free(void *ptr);
#ifdef USE_MSVCRT_DEBUG
#define BZ_Malloc(size) BZ_MallocNamed(size, __FILE__, __LINE__)
#define Z_Malloc(size) Z_MallocNamed(size, __FILE__, __LINE__)
#define BZ_Realloc(ptr, size) BZ_ReallocNamed(ptr, size, __FILE__, __LINE__)
#define BZF_Malloc(size) BZF_MallocNamed(size, __FILE__, __LINE__)
#define ZF_Malloc(size) ZF_MallocNamed(size, __FILE__, __LINE__)
#define BZF_Realloc(ptr, size) BZF_ReallocNamed(ptr, size, __FILE__, __LINE__)
#endif
void *Hunk_Alloc (int size); // returns 0 filled memory
void *Hunk_AllocName (int size, char *name);
int Hunk_LowMark (void);
void Hunk_FreeToLowMark (int mark);
int Hunk_LowMemAvailable(void);
void *Hunk_TempAlloc (int size);
void *Hunk_TempAllocMore (int size); //Don't clear old temp
void Hunk_Check (void);
typedef struct cache_user_s
{
void *data;
qboolean fake;
} cache_user_t;
void Cache_Flush (void);
void *Cache_Check (cache_user_t *c);
// returns the cached data, and moves to the head of the LRU list
// if present, otherwise returns NULL
void Cache_Free (cache_user_t *c);
void *Cache_Alloc (cache_user_t *c, int size, char *name);
// Returns NULL if all purgable data was tossed and there still
// wasn't enough room.
void Cache_Report (void);