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fixed is_reserved

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This commit is contained in:
joaquintides
2023-12-26 18:11:22 +01:00
parent 0a6da6979f
commit 8365ccb78a
1 changed files with 13 additions and 13 deletions
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26
include/boost/unordered/detail/foa/concurrent_table.hpp
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@ -1579,24 +1579,24 @@ private:
}
}
static bool is_reserved(group_type* pg,std::size_t pos)
static bool is_really_occupied(group_type* pg,std::size_t pos)
{
return is_reserved(
return is_really_occupied(
std::integral_constant<bool,group_type::regular_layout>{},pg,pos);
}
static bool is_reserved(
std::true_type, /* regular layout */
group_type* pg,std::size_t pos)
static bool is_really_occupied(
/* regular layout, almost-latch-free insertion -> spurious non-zeros */
std::true_type,group_type* pg,std::size_t pos)
{
return reinterpret_cast<std::atomic<unsigned char>*>(pg)[pos]==1;
return reinterpret_cast<std::atomic<unsigned char>*>(pg)[pos]>1;
}
static bool is_reserved(
std::false_type, /* non-regular layout, never reserved */
group_type*,std::size_t)
static bool is_really_occupied(
/* non-regular layout, latched insertion -> no false positives */
std::false_type,group_type*,std::size_t)
{
return false;
return true;
}
template<typename GroupAccessMode,typename F>
@ -1636,7 +1636,7 @@ private:
auto mask=this->match_really_occupied(pg,last);
while(mask){
auto n=unchecked_countr_zero(mask);
if(BOOST_LIKELY(!is_reserved(pg,n))&&!f(pg,n,p+n))return false;
if(BOOST_LIKELY(is_really_occupied(pg,n))&&!f(pg,n,p+n))return false;
mask&=mask-1;
}
}
@ -1671,7 +1671,7 @@ private:
auto mask=this->match_really_occupied(&g,last);
while(mask){
auto n=unchecked_countr_zero(mask);
if(BOOST_LIKELY(!is_reserved(&g,n)))f(&g,n,p+n);
if(BOOST_LIKELY(is_really_occupied(&g,n)))f(&g,n,p+n);
mask&=mask-1;
}
}
@ -1693,7 +1693,7 @@ private:
auto mask=this->match_really_occupied(&g,last);
while(mask){
auto n=unchecked_countr_zero(mask);
if(BOOST_LIKELY(!is_reserved(&g,n))&&!f(p+n))return false;
if(BOOST_LIKELY(is_really_occupied(&g,n))&&!f(p+n))return false;
mask&=mask-1;
}
return true;