67 lines
1.2 KiB
C
67 lines
1.2 KiB
C
/*
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* malloc.h
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*
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* Internals for the memory allocator
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*/
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// #include <stdint.h>
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#include <stddef.h>
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// #include <klibc/sysconfig.h>
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#define _KLIBC_MALLOC_CHUNK_SIZE 65536
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* This structure should be a power of two. This becomes the
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* alignment unit.
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*/
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struct free_arena_header;
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struct arena_header {
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size_t type;
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size_t size;
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struct free_arena_header *next, *prev;
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};
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#ifdef DEBUG_MALLOC
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#define ARENA_TYPE_USED 0x64e69c70
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#define ARENA_TYPE_FREE 0x012d610a
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#define ARENA_TYPE_HEAD 0x971676b5
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#define ARENA_TYPE_DEAD 0xeeeeeeee
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#else
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#define ARENA_TYPE_USED 0
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#define ARENA_TYPE_FREE 1
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#define ARENA_TYPE_HEAD 2
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#endif
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#define MALLOC_CHUNK_MASK (_KLIBC_MALLOC_CHUNK_SIZE-1)
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#define ARENA_SIZE_MASK (~(sizeof(struct arena_header)-1))
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/*
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* This structure should be no more than twice the size of the
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* previous structure.
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*/
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struct free_arena_header {
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struct arena_header a;
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struct free_arena_header *next_free, *prev_free;
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};
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extern char heap_low, heap_top; // Take the addresses of these.
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void malloc_add(void *p,size_t size);
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void *malloc(size_t);
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void free(void *m);
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#ifdef __cplusplus
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}
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#endif
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/*
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* Internal variable used by brk/sbrk
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*/
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// extern char *__current_brk;
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