chunk.h revision 609ae595f0358157b19311b0f9f9591db7cee705 
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(size_t size, size_t alignment, bool base, bool *zero,
47    dss_prec_t dss_prec);
48void	chunk_unmap(void *chunk, size_t size);
49void	chunk_dealloc(void *chunk, size_t size, bool unmap);
50bool	chunk_boot(void);
51void	chunk_prefork(void);
52void	chunk_postfork_parent(void);
53void	chunk_postfork_child(void);
54
55#endif /* JEMALLOC_H_EXTERNS */
56/******************************************************************************/
57#ifdef JEMALLOC_H_INLINES
58
59#endif /* JEMALLOC_H_INLINES */
60/******************************************************************************/
61
62#include "jemalloc/internal/chunk_dss.h"
63#include "jemalloc/internal/chunk_mmap.h"
64