1#ifndef JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
2#define JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
3
4#include "jemalloc/internal/cache_bin.h"
5#include "jemalloc/internal/ql.h"
6#include "jemalloc/internal/sc.h"
7#include "jemalloc/internal/ticker.h"
8#include "jemalloc/internal/tsd_types.h"
9
10/* Various uses of this struct need it to be a named type. */
11typedef ql_elm(tsd_t) tsd_link_t;
12
13struct tcache_s {
14	/*
15	 * To minimize our cache-footprint, we put the frequently accessed data
16	 * together at the start of this struct.
17	 */
18
19	/* Cleared after arena_prof_accum(). */
20	uint64_t	prof_accumbytes;
21	/* Drives incremental GC. */
22	ticker_t	gc_ticker;
23	/*
24	 * The pointer stacks associated with bins follow as a contiguous array.
25	 * During tcache initialization, the avail pointer in each element of
26	 * tbins is initialized to point to the proper offset within this array.
27	 */
28	cache_bin_t	bins_small[SC_NBINS];
29
30	/*
31	 * This data is less hot; we can be a little less careful with our
32	 * footprint here.
33	 */
34	/* Lets us track all the tcaches in an arena. */
35	ql_elm(tcache_t) link;
36
37	/* Logically scoped to tsd, but put here for cache layout reasons. */
38	ql_elm(tsd_t) tsd_link;
39	bool in_hook;
40
41	/*
42	 * The descriptor lets the arena find our cache bins without seeing the
43	 * tcache definition.  This enables arenas to aggregate stats across
44	 * tcaches without having a tcache dependency.
45	 */
46	cache_bin_array_descriptor_t cache_bin_array_descriptor;
47
48	/* The arena this tcache is associated with. */
49	arena_t		*arena;
50	/* Next bin to GC. */
51	szind_t		next_gc_bin;
52	/* For small bins, fill (ncached_max >> lg_fill_div). */
53	uint8_t		lg_fill_div[SC_NBINS];
54	/*
55	 * We put the cache bins for large size classes at the end of the
56	 * struct, since some of them might not get used.  This might end up
57	 * letting us avoid touching an extra page if we don't have to.
58	 */
59	cache_bin_t	bins_large[SC_NSIZES-SC_NBINS];
60};
61
62/* Linkage for list of available (previously used) explicit tcache IDs. */
63struct tcaches_s {
64	union {
65		tcache_t	*tcache;
66		tcaches_t	*next;
67	};
68};
69
70#endif /* JEMALLOC_INTERNAL_TCACHE_STRUCTS_H */
71