56 lines
1.7 KiB
C
56 lines
1.7 KiB
C
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#ifndef JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
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#define JEMALLOC_INTERNAL_TCACHE_STRUCTS_H
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typedef enum {
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tcache_enabled_false = 0, /* Enable cast to/from bool. */
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tcache_enabled_true = 1,
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tcache_enabled_default = 2
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} tcache_enabled_t;
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/*
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* Read-only information associated with each element of tcache_t's tbins array
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* is stored separately, mainly to reduce memory usage.
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*/
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struct tcache_bin_info_s {
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unsigned ncached_max; /* Upper limit on ncached. */
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};
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struct tcache_bin_s {
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tcache_bin_stats_t tstats;
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int low_water; /* Min # cached since last GC. */
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unsigned lg_fill_div; /* Fill (ncached_max >> lg_fill_div). */
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unsigned ncached; /* # of cached objects. */
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/*
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* To make use of adjacent cacheline prefetch, the items in the avail
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* stack goes to higher address for newer allocations. avail points
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* just above the available space, which means that
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* avail[-ncached, ... -1] are available items and the lowest item will
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* be allocated first.
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*/
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void **avail; /* Stack of available objects. */
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};
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struct tcache_s {
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ql_elm(tcache_t) link; /* Used for aggregating stats. */
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uint64_t prof_accumbytes;/* Cleared after arena_prof_accum(). */
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ticker_t gc_ticker; /* Drives incremental GC. */
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szind_t next_gc_bin; /* Next bin to GC. */
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tcache_bin_t tbins[1]; /* Dynamically sized. */
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/*
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* The pointer stacks associated with tbins follow as a contiguous
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* array. During tcache initialization, the avail pointer in each
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* element of tbins is initialized to point to the proper offset within
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* this array.
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*/
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};
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/* Linkage for list of available (previously used) explicit tcache IDs. */
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struct tcaches_s {
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union {
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tcache_t *tcache;
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tcaches_t *next;
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};
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};
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#endif /* JEMALLOC_INTERNAL_TCACHE_STRUCTS_H */
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