chunk.h revision 12141150fdbda57651a53ae2fe0edaea4891d814 
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;
31extern const char	*opt_dss;
32
33/* Protects stats_chunks; currently not used for any other purpose. */
34extern malloc_mutex_t	chunks_mtx;
35/* Chunk statistics. */
36extern chunk_stats_t	stats_chunks;
37
38extern rtree_t		*chunks_rtree;
39
40extern size_t		chunksize;
41extern size_t		chunksize_mask; /* (chunksize - 1). */
42extern size_t		chunk_npages;
43extern size_t		map_bias; /* Number of arena chunk header pages. */
44extern size_t		arena_maxclass; /* Max size class for arenas. */
45
46void	*chunk_alloc_base(size_t size);
47void	*chunk_alloc_arena(chunk_alloc_t *chunk_alloc,
48    chunk_dalloc_t *chunk_dalloc, unsigned arena_ind, size_t size,
49    size_t alignment, bool *zero);
50void	*chunk_alloc_default(size_t size, size_t alignment, bool *zero,
51    unsigned arena_ind);
52void	chunk_unmap(void *chunk, size_t size);
53bool	chunk_dalloc_default(void *chunk, size_t size, unsigned arena_ind);
54bool	chunk_boot(void);
55void	chunk_prefork(void);
56void	chunk_postfork_parent(void);
57void	chunk_postfork_child(void);
58
59#endif /* JEMALLOC_H_EXTERNS */
60/******************************************************************************/
61#ifdef JEMALLOC_H_INLINES
62
63#endif /* JEMALLOC_H_INLINES */
64/******************************************************************************/
65
66#include "jemalloc/internal/chunk_dss.h"
67#include "jemalloc/internal/chunk_mmap.h"
68