chunk.h revision eae269036c9f702d9fa9be497a1a2aa1be13a29e 
1/******************************************************************************/
2#ifdef JEMALLOC_H_TYPES
3
4/*
5 * Size and alignment of memory chunks that are allocated by the OS's virtual
6 * memory system.
7 */
8#define	LG_CHUNK_DEFAULT	22
9
10/* Return the chunk address for allocation address a. */
11#define	CHUNK_ADDR2BASE(a)						\
12	((void *)((uintptr_t)(a) & ~chunksize_mask))
13
14/* Return the chunk offset of address a. */
15#define	CHUNK_ADDR2OFFSET(a)						\
16	((size_t)((uintptr_t)(a) & chunksize_mask))
17
18/* Return the smallest chunk multiple that is >= s. */
19#define	CHUNK_CEILING(s)						\
20	(((s) + chunksize_mask) & ~chunksize_mask)
21
22#endif /* JEMALLOC_H_TYPES */
23/******************************************************************************/
24#ifdef JEMALLOC_H_STRUCTS
25
26#endif /* JEMALLOC_H_STRUCTS */
27/******************************************************************************/
28#ifdef JEMALLOC_H_EXTERNS
29
30extern size_t		opt_lg_chunk;
31
32/* Protects stats_chunks; currently not used for any other purpose. */
33extern malloc_mutex_t	chunks_mtx;
34/* Chunk statistics. */
35extern chunk_stats_t	stats_chunks;
36
37extern rtree_t		*chunks_rtree;
38
39extern size_t		chunksize;
40extern size_t		chunksize_mask; /* (chunksize - 1). */
41extern size_t		chunk_npages;
42extern size_t		map_bias; /* Number of arena chunk header pages. */
43extern size_t		arena_maxclass; /* Max size class for arenas. */
44
45void	*chunk_alloc(size_t size, size_t alignment, bool base, bool *zero);
46void	chunk_dealloc(void *chunk, size_t size, bool unmap);
47bool	chunk_boot0(void);
48bool	chunk_boot1(void);
49
50#endif /* JEMALLOC_H_EXTERNS */
51/******************************************************************************/
52#ifdef JEMALLOC_H_INLINES
53
54#endif /* JEMALLOC_H_INLINES */
55/******************************************************************************/
56
57#include "jemalloc/internal/chunk_dss.h"
58#include "jemalloc/internal/chunk_mmap.h"
59