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/*
* 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;
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