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avoided usage of match_really_occupied on for_all_elements_while (used by rehash)

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This commit is contained in:
joaquintides
2023-03-16 10:44:01 +01:00
committed by Christian Mazakas
parent ff78ef25c0
commit ca59ed8c50
1 changed files with 21 additions and 0 deletions
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21
include/boost/unordered/detail/foa/core.hpp
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@ -1634,6 +1634,7 @@ public:
static auto for_all_elements_while(const arrays_type& arrays_,F f)
->decltype(f(nullptr,0,nullptr),void())
{
#if 0
auto p=arrays_.elements;
if(!p){return;}
for(auto pg=arrays_.groups,last=pg+arrays_.groups_size_mask+1;
@ -1645,6 +1646,26 @@ public:
mask&=mask-1;
}
}
#else
auto p=arrays_.elements;
if(!p){return;}
auto pg=arrays_.groups;
for(auto last=pg+arrays_.groups_size_mask;
pg!=last;++pg,p+=N){
auto mask=pg->match_occupied();
while(mask){
auto n=unchecked_countr_zero(mask);
if(!f(pg,n,p+n))return;
mask&=mask-1;
}
}
auto mask=pg->match_really_occupied();
while(mask){
auto n=unchecked_countr_zero(mask);
if(!f(pg,n,p+n))return;
mask&=mask-1;
}
#endif
}
arrays_type arrays;