51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
#ifndef JEMALLOC_INTERNAL_EXP_GROW_H
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#define JEMALLOC_INTERNAL_EXP_GROW_H
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typedef struct exp_grow_s exp_grow_t;
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struct exp_grow_s {
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/*
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* Next extent size class in a growing series to use when satisfying a
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* request via the extent hooks (only if opt_retain). This limits the
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* number of disjoint virtual memory ranges so that extent merging can
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* be effective even if multiple arenas' extent allocation requests are
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* highly interleaved.
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*
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* retain_grow_limit is the max allowed size ind to expand (unless the
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* required size is greater). Default is no limit, and controlled
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* through mallctl only.
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*/
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pszind_t next;
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pszind_t limit;
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};
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static inline bool
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exp_grow_size_prepare(exp_grow_t *exp_grow, size_t alloc_size_min,
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size_t *r_alloc_size, pszind_t *r_skip) {
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*r_skip = 0;
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*r_alloc_size = sz_pind2sz(exp_grow->next + *r_skip);
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while (*r_alloc_size < alloc_size_min) {
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(*r_skip)++;
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if (exp_grow->next + *r_skip >=
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sz_psz2ind(SC_LARGE_MAXCLASS)) {
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/* Outside legal range. */
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return true;
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}
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*r_alloc_size = sz_pind2sz(exp_grow->next + *r_skip);
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}
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return false;
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}
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static inline void
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exp_grow_size_commit(exp_grow_t *exp_grow, pszind_t skip) {
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if (exp_grow->next + skip + 1 <= exp_grow->limit) {
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exp_grow->next += skip + 1;
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} else {
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exp_grow->next = exp_grow->limit;
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}
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}
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void exp_grow_init(exp_grow_t *exp_grow);
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#endif /* JEMALLOC_INTERNAL_EXP_GROW_H */
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