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Flat bitmap: Add longest-range computation.

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This will come in handy in the (upcoming) page-slab set assertions.
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David Goldblatt 2020-09-17 18:12:06 -07:00 • committed by David Goldblatt
parent e034500698
commit ed99d300b9
2 changed files with 66 additions and 0 deletions
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25
include/jemalloc/internal/flat_bitmap.h
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@ -284,4 +284,29 @@ fb_urange_riter(fb_group_t *fb, size_t nbits, size_t start, size_t *r_begin,
/* val */ false, /* forward */ false);
}
JEMALLOC_ALWAYS_INLINE size_t
fb_range_longest_impl(fb_group_t *fb, size_t nbits, bool val) {
size_t begin = 0;
size_t longest_len = 0;
size_t len = 0;
while (begin < nbits && fb_iter_range_impl(fb, nbits, begin, &begin,
&len, val, /* forward */ true)) {
if (len > longest_len) {
longest_len = len;
}
begin += len;
}
return longest_len;
}
static inline size_t
fb_srange_longest(fb_group_t *fb, size_t nbits) {
return fb_range_longest_impl(fb, nbits, /* val */ true);
}
static inline size_t
fb_urange_longest(fb_group_t *fb, size_t nbits) {
return fb_range_longest_impl(fb, nbits, /* val */ false);
}
#endif /* JEMALLOC_INTERNAL_FB_H */