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.
24 // LordHavoc: this is pointless with a good C library
27 #define POOLNAMESIZE 128
29 // give malloc padding so we can't waste most of a page at the end
30 #define MEMCLUMPSIZE (65536 - 1536)
31 // smallest unit we care about is this many bytes
33 #define MEMBITS (MEMCLUMPSIZE / MEMUNIT)
34 #define MEMBITINTS (MEMBITS / 32)
35 #define MEMCLUMP_SENTINEL 0xABADCAFE
38 #define MEMHEADER_SENTINEL1 0xDEADF00D
39 #define MEMHEADER_SENTINEL2 0xDF
41 typedef struct memheader_s
43 // next memheader in chain belonging to pool
44 struct memheader_s *chain;
45 // pool this memheader belongs to
46 struct mempool_s *pool;
48 // clump this memheader lives in, NULL if not in a clump
49 struct memclump_s *clump;
51 // size of the memory after the header (excluding header and sentinel2)
53 // file name and line where Mem_Alloc was called
56 // should always be MEMHEADER_SENTINEL1
58 // immediately followed by data, which is followed by a MEMHEADER_SENTINEL2 byte
63 typedef struct memclump_s
65 // contents of the clump
66 qbyte block[MEMCLUMPSIZE];
67 // should always be MEMCLUMP_SENTINEL
69 // if a bit is on, it means that the MEMUNIT bytes it represents are
70 // allocated, otherwise free
72 // should always be MEMCLUMP_SENTINEL
74 // if this drops to 0, the clump is freed
76 // largest block of memory available (this is reset to an optimistic
77 // number when anything is freed, and updated when alloc fails the clump)
79 // next clump in the chain
80 struct memclump_s *chain;
85 typedef struct mempool_s
87 // chain of individual memory allocations
88 struct memheader_s *chain;
90 // chain of clumps (if any)
91 struct memclump_s *clumpchain;
93 // total memory allocated in this pool (inside memheaders)
95 // total memory allocated in this pool (actual malloc total)
97 // updated each time the pool is displayed by memlist, shows change from previous time (unless pool was freed)
100 char name[POOLNAMESIZE];
101 // linked into global mempool list
102 struct mempool_s *next;
106 #define Mem_Alloc(pool,size) _Mem_Alloc(pool, size, __FILE__, __LINE__)
107 #define Mem_Free(mem) _Mem_Free(mem, __FILE__, __LINE__)
108 #define Mem_CheckSentinels(data) _Mem_CheckSentinels(data, __FILE__, __LINE__)
109 #define Mem_CheckSentinelsGlobal() _Mem_CheckSentinelsGlobal(__FILE__, __LINE__)
110 #define Mem_AllocPool(name) _Mem_AllocPool(name, __FILE__, __LINE__)
111 #define Mem_FreePool(pool) _Mem_FreePool(pool, __FILE__, __LINE__)
112 #define Mem_EmptyPool(pool) _Mem_EmptyPool(pool, __FILE__, __LINE__)
114 void *_Mem_Alloc(mempool_t *pool, int size, char *filename, int fileline);
115 void _Mem_Free(void *data, char *filename, int fileline);
116 mempool_t *_Mem_AllocPool(char *name, char *filename, int fileline);
117 void _Mem_FreePool(mempool_t **pool, char *filename, int fileline);
118 void _Mem_EmptyPool(mempool_t *pool, char *filename, int fileline);
119 void _Mem_CheckSentinels(void *data, char *filename, int fileline);
120 void _Mem_CheckSentinelsGlobal(char *filename, int fileline);
122 // used for temporary allocations
123 mempool_t *tempmempool;
125 void Memory_Init (void);
126 void Memory_Init_Commands (void);
128 extern mempool_t *zonemempool;
129 #define Z_Malloc(size) Mem_Alloc(zonemempool,size)
130 #define Z_Free(data) Mem_Free(data)