1#ifndef JEMALLOC_INTERNAL_TCACHE_TYPES_H
2#define JEMALLOC_INTERNAL_TCACHE_TYPES_H
3
4#include "jemalloc/internal/sc.h"
5
6typedef struct tcache_s tcache_t;
7typedef struct tcaches_s tcaches_t;
8
9/*
10 * tcache pointers close to NULL are used to encode state information that is
11 * used for two purposes: preventing thread caching on a per thread basis and
12 * cleaning up during thread shutdown.
13 */
14#define TCACHE_STATE_DISABLED ((tcache_t *)(uintptr_t)1)
15#define TCACHE_STATE_REINCARNATED ((tcache_t *)(uintptr_t)2)
16#define TCACHE_STATE_PURGATORY ((tcache_t *)(uintptr_t)3)
17#define TCACHE_STATE_MAX TCACHE_STATE_PURGATORY
18
19/*
20 * Absolute minimum number of cache slots for each small bin.
21 */
22#define TCACHE_NSLOTS_SMALL_MIN 20
23
24/*
25 * Absolute maximum number of cache slots for each small bin in the thread
26 * cache. This is an additional constraint beyond that imposed as: twice the
27 * number of regions per slab for this size class.
28 *
29 * This constant must be an even number.
30 */
31#define TCACHE_NSLOTS_SMALL_MAX 200
32
33/* Number of cache slots for large size classes. */
34#define TCACHE_NSLOTS_LARGE 20
35
36/* (1U << opt_lg_tcache_max) is used to compute tcache_maxclass. */
37#define LG_TCACHE_MAXCLASS_DEFAULT 15
38
39/*
40 * TCACHE_GC_SWEEP is the approximate number of allocation events between
41 * full GC sweeps. Integer rounding may cause the actual number to be
42 * slightly higher, since GC is performed incrementally.
43 */
44#define TCACHE_GC_SWEEP 8192
45
46/* Number of tcache allocation/deallocation events between incremental GCs. */
47#define TCACHE_GC_INCR \
48 ((TCACHE_GC_SWEEP / SC_NBINS) + ((TCACHE_GC_SWEEP / SC_NBINS == 0) ? 0 : 1))
49
50/* Used in TSD static initializer only. Real init in tcache_data_init(). */
51#define TCACHE_ZERO_INITIALIZER {0}
52
53/* Used in TSD static initializer only. Will be initialized to opt_tcache. */
54#define TCACHE_ENABLED_ZERO_INITIALIZER false
55
56/* Used for explicit tcache only. Means flushed but not destroyed. */
57#define TCACHES_ELM_NEED_REINIT ((tcache_t *)(uintptr_t)1)
58
59#endif /* JEMALLOC_INTERNAL_TCACHE_TYPES_H */
60