57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
#ifndef JEMALLOC_INTERNAL_EDATA_CACHE_H
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#define JEMALLOC_INTERNAL_EDATA_CACHE_H
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#include "jemalloc/internal/base.h"
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/*
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* A cache of edata_t structures allocated via base_alloc_edata (as opposed to
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* the underlying extents they describe). The contents of returned edata_t
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* objects are garbage and cannot be relied upon.
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*/
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typedef struct edata_cache_s edata_cache_t;
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struct edata_cache_s {
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edata_tree_t avail;
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atomic_zu_t count;
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malloc_mutex_t mtx;
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base_t *base;
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};
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bool edata_cache_init(edata_cache_t *edata_cache, base_t *base);
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edata_t *edata_cache_get(tsdn_t *tsdn, edata_cache_t *edata_cache);
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void edata_cache_put(tsdn_t *tsdn, edata_cache_t *edata_cache, edata_t *edata);
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void edata_cache_prefork(tsdn_t *tsdn, edata_cache_t *edata_cache);
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void edata_cache_postfork_parent(tsdn_t *tsdn, edata_cache_t *edata_cache);
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void edata_cache_postfork_child(tsdn_t *tsdn, edata_cache_t *edata_cache);
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typedef struct edata_cache_small_s edata_cache_small_t;
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struct edata_cache_small_s {
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edata_list_t list;
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size_t count;
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edata_cache_t *fallback;
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};
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/*
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* An edata_cache_small is like an edata_cache, but it relies on external
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* synchronization and avoids first-fit strategies. You can call "prepare" to
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* acquire at least num edata_t objects, and then "finish" to flush all
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* excess ones back to their fallback edata_cache_t. Once they have been
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* acquired, they can be allocated without failing (and in fact, this is
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* required -- it's not permitted to attempt to get an edata_t without first
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* preparing for it).
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*/
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void edata_cache_small_init(edata_cache_small_t *ecs, edata_cache_t *fallback);
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/* Returns whether or not an error occurred. */
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bool edata_cache_small_prepare(tsdn_t *tsdn, edata_cache_small_t *ecs,
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size_t num);
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edata_t *edata_cache_small_get(edata_cache_small_t *ecs);
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void edata_cache_small_put(edata_cache_small_t *ecs, edata_t *edata);
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void edata_cache_small_finish(tsdn_t *tsdn, edata_cache_small_t *ecs,
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size_t num);
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#endif /* JEMALLOC_INTERNAL_EDATA_CACHE_H */
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