usr/klibc/malloc.h

/*
 * malloc.h
 *
 * Internals for the memory allocator
 */

#include <stdint.h>
#include <stddef.h>
#include <klibc/sysconfig.h>

/*
 * This structure should be a power of two.  This becomes the
 * alignment unit.
 */
struct free_arena_header;

struct arena_header {
	size_t type;
	size_t size;
	struct free_arena_header *next, *prev;
};

#ifdef DEBUG_MALLOC
#define ARENA_TYPE_USED 0x64e69c70
#define ARENA_TYPE_FREE 0x012d610a
#define ARENA_TYPE_HEAD 0x971676b5
#define ARENA_TYPE_DEAD 0xeeeeeeee
#else
#define ARENA_TYPE_USED 0
#define ARENA_TYPE_FREE 1
#define ARENA_TYPE_HEAD 2
#endif

#define MALLOC_CHUNK_MASK (_KLIBC_MALLOC_CHUNK_SIZE-1)

#define ARENA_SIZE_MASK (~(sizeof(struct arena_header)-1))

/*
 * This structure should be no more than twice the size of the
 * previous structure.
 */
struct free_arena_header {
	struct arena_header a;
	struct free_arena_header *next_free, *prev_free;
};

/*
 * Internal variable used by brk/sbrk
 */
extern char *__current_brk;
1	niro	532	/*
2			* malloc.h
3			*
4			* Internals for the memory allocator
5			*/
6
7			#include <stdint.h>
8			#include <stddef.h>
9			#include <klibc/sysconfig.h>
10
11			/*
12			* This structure should be a power of two. This becomes the
13			* alignment unit.
14			*/
15			struct free_arena_header;
16
17			struct arena_header {
18			size_t type;
19	niro	815	size_t size;
20	niro	532	struct free_arena_header next, prev;
21			};
22
23			#ifdef DEBUG_MALLOC
24			#define ARENA_TYPE_USED 0x64e69c70
25			#define ARENA_TYPE_FREE 0x012d610a
26			#define ARENA_TYPE_HEAD 0x971676b5
27			#define ARENA_TYPE_DEAD 0xeeeeeeee
28			#else
29			#define ARENA_TYPE_USED 0
30			#define ARENA_TYPE_FREE 1
31			#define ARENA_TYPE_HEAD 2
32			#endif
33
34			#define MALLOC_CHUNK_MASK (_KLIBC_MALLOC_CHUNK_SIZE-1)
35
36			#define ARENA_SIZE_MASK (~(sizeof(struct arena_header)-1))
37
38			/*
39			* This structure should be no more than twice the size of the
40			* previous structure.
41			*/
42			struct free_arena_header {
43			struct arena_header a;
44			struct free_arena_header next_free, prev_free;
45			};
46
47			/*
48			* Internal variable used by brk/sbrk
49			*/
50			extern char *__current_brk;