chunk.h revision 12a488782681cbd740a5f54e0b7e74ea84858e21 
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#ifdef JEMALLOC_SWAP
32extern bool		opt_overcommit;
33#endif
34
35#if (defined(JEMALLOC_STATS) || defined(JEMALLOC_PROF))
36/* Protects stats_chunks; currently not used for any other purpose. */
37extern malloc_mutex_t	chunks_mtx;
38/* Chunk statistics. */
39extern chunk_stats_t	stats_chunks;
40#endif
41
42#ifdef JEMALLOC_IVSALLOC
43extern rtree_t		*chunks_rtree;
44#endif
45
46extern size_t		chunksize;
47extern size_t		chunksize_mask; /* (chunksize - 1). */
48extern size_t		chunk_npages;
49extern size_t		map_bias; /* Number of arena chunk header pages. */
50extern size_t		arena_maxclass; /* Max size class for arenas. */
51
52void	*chunk_alloc(size_t size, bool base, bool *zero);
53void	chunk_dealloc(void *chunk, size_t size, bool unmap);
54bool	chunk_boot(void);
55
56#endif /* JEMALLOC_H_EXTERNS */
57/******************************************************************************/
58#ifdef JEMALLOC_H_INLINES
59
60#endif /* JEMALLOC_H_INLINES */
61/******************************************************************************/
62
63#include "jemalloc/internal/chunk_swap.h"
64#include "jemalloc/internal/chunk_dss.h"
65#include "jemalloc/internal/chunk_mmap.h"
66