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<__msvc_threads_core.hpp>: Use aligned byte arrays as aligned buffers #5811

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Merged
merged 2 commits into from
Oct 29, 2025
+14 −14
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<__msvc_threads_core.hpp>: Use aligned byte arrays as aligned buffers #5811

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2c6cedf
Use aligned byte arrays as aligned buffers
frederick-vs-ja Oct 26, 2025
48f86d2
Perma-workaround VSO-2616030.
StephanTLavavej Oct 28, 2025
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6 changes: 3 additions & 3 deletions stl/inc/__msvc_threads_core.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
#define __MSVC_THREADS_CORE_HPP
#include <yvals_core.h>
#if _STL_COMPILER_PREPROCESSOR
#include <type_traits>
#include <cstddef>

#pragma pack(push, _CRT_PACKING)
#pragma warning(push, _STL_WARNING_LEVEL)
Expand Down Expand Up @@ -43,7 +43,7 @@ struct _Mtx_internal_imp_t {
int _Type{};
union {
_Stl_critical_section _Critical_section{};
_STD _Aligned_storage_t<_Critical_section_size, alignof(void*)> _Cs_storage;
alignas(void*) unsigned char _Cs_storage[_Critical_section_size];
};
long _Thread_id{};
int _Count{};
Expand All @@ -68,7 +68,7 @@ struct _Cnd_internal_imp_t {

union {
_Stl_condition_variable _Stl_cv{};
_STD _Aligned_storage_t<_Cnd_internal_imp_size, alignof(void*)> _Cv_storage;
alignas(void*) unsigned char _Cv_storage[_Cnd_internal_imp_size];
};
};
#pragma warning(pop)
Expand Down