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joaquintides
2023-06-09 13:58:34 +02:00
parent c230a87f8a
commit 834a39c6a8
1 changed files with 7 additions and 5 deletions
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12
include/boost/unordered/detail/foa/concurrent_table.hpp
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@ -300,16 +300,18 @@ struct concurrent_table_arrays:table_arrays<Value,Group,SizePolicy>
group_access *group_accesses; group_access *group_accesses;
}; };
struct cache_aligned_size_control struct atomic_size_control
{ {
static constexpr auto atomic_size_t_size=sizeof(std::atomic<std::size_t>); static constexpr auto atomic_size_t_size=sizeof(std::atomic<std::size_t>);
BOOST_STATIC_ASSERT(atomic_size_t_size<cacheline_size); BOOST_STATIC_ASSERT(atomic_size_t_size<cacheline_size);
cache_aligned_size_control(std::size_t ml_,std::size_t size_): atomic_size_control(std::size_t ml_,std::size_t size_):
pad0_{},ml{ml_},pad1_{},size{size_}{} pad0_{},ml{ml_},pad1_{},size{size_}{}
cache_aligned_size_control(cache_aligned_size_control& x): atomic_size_control(atomic_size_control& x):
pad0_{},ml{x.ml.load()},pad1_{},size{x.size.load()}{} pad0_{},ml{x.ml.load()},pad1_{},size{x.size.load()}{}
/* padding to avoid false sharing internally and with sorrounding data */
unsigned char pad0_[cacheline_size-atomic_size_t_size]; unsigned char pad0_[cacheline_size-atomic_size_t_size];
std::atomic<std::size_t> ml; std::atomic<std::size_t> ml;
unsigned char pad1_[cacheline_size-atomic_size_t_size]; unsigned char pad1_[cacheline_size-atomic_size_t_size];
@ -326,7 +328,7 @@ swap_atomic_size_t(std::atomic<std::size_t>& x,std::atomic<std::size_t>& y)
y=tmp; y=tmp;
} }
inline void swap(cache_aligned_size_control& x,cache_aligned_size_control& y) inline void swap(atomic_size_control& x,atomic_size_control& y)
{ {
swap_atomic_size_t(x.ml,y.ml); swap_atomic_size_t(x.ml,y.ml);
swap_atomic_size_t(x.size,y.size); swap_atomic_size_t(x.size,y.size);
@ -392,7 +394,7 @@ inline void swap(cache_aligned_size_control& x,cache_aligned_size_control& y)
template <typename TypePolicy,typename Hash,typename Pred,typename Allocator> template <typename TypePolicy,typename Hash,typename Pred,typename Allocator>
using concurrent_table_core_impl=table_core< using concurrent_table_core_impl=table_core<
TypePolicy,group15<atomic_integral>,concurrent_table_arrays, TypePolicy,group15<atomic_integral>,concurrent_table_arrays,
cache_aligned_size_control,Hash,Pred,Allocator>; atomic_size_control,Hash,Pred,Allocator>;
#include <boost/unordered/detail/foa/ignore_wshadow.hpp> #include <boost/unordered/detail/foa/ignore_wshadow.hpp>