2 Copyright (C) 1996-1997 Id Software, Inc.
4 This program is free software; you can redistribute it and/or
5 modify it under the terms of the GNU General Public License
6 as published by the Free Software Foundation; either version 2
7 of the License, or (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 See the GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #define POOLNAMESIZE 128
22 // give malloc padding so we can't waste most of a page at the end
23 #define MEMCLUMPSIZE (65536 - 1536)
24 // smallest unit we care about is this many bytes
26 #define MEMBITS (MEMCLUMPSIZE / MEMUNIT)
27 #define MEMBITINTS (MEMBITS / 32)
29 #define MEMHEADER_SENTINEL 0xABADCAFE
30 #define MEMCLUMP_SENTINEL 0xDEADF00D
32 typedef struct memheader_s
34 // next memheader in chain belonging to pool
35 struct memheader_s *chain;
36 // pool this memheader belongs to
37 struct mempool_s *pool;
38 // clump this memheader lives in, NULL if not in a clump
39 struct memclump_s *clump;
40 // size of the memory after the header (excluding header and sentinel2)
42 // file name and line where Mem_Alloc was called
45 // should always be MEMHEADER_SENTINEL
47 // immediately followed by data, which is followed by another MEMHEADER_SENTINEL
51 typedef struct memclump_s
53 // contents of the clump
54 byte block[MEMCLUMPSIZE];
55 // should always be MEMCLUMP_SENTINEL
57 // if a bit is on, it means that the MEMUNIT bytes it represents are
58 // allocated, otherwise free
60 // should always be MEMCLUMP_SENTINEL
62 // if this drops to 0, the clump is freed
64 // largest block of memory available (this is reset to an optimistic
65 // number when anything is freed, and updated when alloc fails the clump)
67 // next clump in the chain
68 struct memclump_s *chain;
72 typedef struct mempool_s
74 // chain of individual memory allocations
75 struct memheader_s *chain;
76 // chain of clumps (if any)
77 struct memclump_s *clumpchain;
78 // total memory allocated in this pool (inside memheaders)
80 // total memory allocated in this pool (actual malloc total)
82 // updated each time the pool is displayed by memlist, shows change from previous time (unless pool was freed)
85 char name[POOLNAMESIZE];
86 // linked into global mempool list
87 struct mempool_s *next;
91 #define Mem_Alloc(pool,size) _Mem_Alloc(pool, size, __FILE__, __LINE__)
92 #define Mem_CheckSentinels(data) _Mem_CheckSentinels(data, __FILE__, __LINE__)
93 #define Mem_CheckSentinelsGlobal() _Mem_CheckSentinelsGlobal(__FILE__, __LINE__)
95 void *_Mem_Alloc(mempool_t *pool, int size, char *filename, int fileline);
96 void Mem_Free(void *data);
97 mempool_t *Mem_AllocPool(char *name);
98 void Mem_FreePool(mempool_t **pool);
99 void Mem_EmptyPool(mempool_t *pool);
100 void _Mem_CheckSentinels(void *data, char *filename, int fileline);
101 void _Mem_CheckSentinelsGlobal(char *filename, int fileline);
102 void Mem_PrintStats(void);
103 void Mem_PrintList(void);
105 // used for temporary allocations
106 mempool_t *tempmempool;
108 void Memory_Init (void);
109 void Memory_Init_Commands (void);
111 extern mempool_t *zonemempool;
112 #define Z_Malloc(size) Mem_Alloc(zonemempool,size)
113 #define Z_Free(data) Mem_Free(data)