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      1 #ifndef JEMALLOC_INTERNAL_ECACHE_H
      2 #define JEMALLOC_INTERNAL_ECACHE_H
      3 
      4 #include "jemalloc/internal/eset.h"
      5 #include "jemalloc/internal/san.h"
      6 #include "jemalloc/internal/mutex.h"
      7 
      8 typedef struct ecache_s ecache_t;
      9 struct ecache_s {
     10 	malloc_mutex_t mtx;
     11 	eset_t eset;
     12 	eset_t guarded_eset;
     13 	/* All stored extents must be in the same state. */
     14 	extent_state_t state;
     15 	/* The index of the ehooks the ecache is associated with. */
     16 	unsigned ind;
     17 	/*
     18 	 * If true, delay coalescing until eviction; otherwise coalesce during
     19 	 * deallocation.
     20 	 */
     21 	bool delay_coalesce;
     22 };
     23 
     24 static inline size_t
     25 ecache_npages_get(ecache_t *ecache) {
     26 	return eset_npages_get(&ecache->eset) +
     27 	    eset_npages_get(&ecache->guarded_eset);
     28 }
     29 
     30 /* Get the number of extents in the given page size index. */
     31 static inline size_t
     32 ecache_nextents_get(ecache_t *ecache, pszind_t ind) {
     33 	return eset_nextents_get(&ecache->eset, ind) +
     34 	    eset_nextents_get(&ecache->guarded_eset, ind);
     35 }
     36 
     37 /* Get the sum total bytes of the extents in the given page size index. */
     38 static inline size_t
     39 ecache_nbytes_get(ecache_t *ecache, pszind_t ind) {
     40 	return eset_nbytes_get(&ecache->eset, ind) +
     41 	    eset_nbytes_get(&ecache->guarded_eset, ind);
     42 }
     43 
     44 static inline unsigned
     45 ecache_ind_get(ecache_t *ecache) {
     46 	return ecache->ind;
     47 }
     48 
     49 bool ecache_init(tsdn_t *tsdn, ecache_t *ecache, extent_state_t state,
     50     unsigned ind, bool delay_coalesce);
     51 void ecache_prefork(tsdn_t *tsdn, ecache_t *ecache);
     52 void ecache_postfork_parent(tsdn_t *tsdn, ecache_t *ecache);
     53 void ecache_postfork_child(tsdn_t *tsdn, ecache_t *ecache);
     54 
     55 #endif /* JEMALLOC_INTERNAL_ECACHE_H */
     56