6 void *__mmap(void *, size_t, int, int, int, off_t);
7 int __munmap(void *, size_t);
8 void *__mremap(void *, size_t, size_t, int, ...);
9 int __madvise(void *, size_t, int);
11 void *__expand_heap(size_t *);
13 void __malloc_donate(char *, char *);
17 struct chunk *next, *prev;
26 #define SIZE_ALIGN (4*sizeof(size_t))
27 #define SIZE_MASK (-SIZE_ALIGN)
28 #define OVERHEAD (2*sizeof(size_t))
29 #define MMAP_THRESHOLD (0x1c00*SIZE_ALIGN)
31 #define RECLAIM 163840
33 #define CHUNK_SIZE(c) ((c)->csize & -2)
34 #define CHUNK_PSIZE(c) ((c)->psize & -2)
35 #define PREV_CHUNK(c) ((struct chunk *)((char *)(c) - CHUNK_PSIZE(c)))
36 #define NEXT_CHUNK(c) ((struct chunk *)((char *)(c) + CHUNK_SIZE(c)))
37 #define MEM_TO_CHUNK(p) (struct chunk *)((char *)(p) - OVERHEAD)
38 #define CHUNK_TO_MEM(c) (void *)((char *)(c) + OVERHEAD)
39 #define BIN_TO_CHUNK(i) (MEM_TO_CHUNK(&mal.bins[i].head))
41 #define C_INUSE ((size_t)1)
43 #define IS_MMAPPED(c) !((c)->csize & (C_INUSE))
45 hidden void __bin_chunk(struct chunk *);
47 hidden extern int __malloc_replaced;