[cppabi64] Document that interference constants are not ABI stable#389
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smithp35 wants to merge 1 commit intoARM-software:mainfrom
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[cppabi64] Document that interference constants are not ABI stable#389smithp35 wants to merge 1 commit intoARM-software:mainfrom
smithp35 wants to merge 1 commit intoARM-software:mainfrom
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The std::hardware_constructive_interference and std::hardware_destructive_interference constants are meant to represent maximum and mininum distances between concurrently accessed objects. These values depend on the target CPU and known C++ library implementations such as libc++ and libstdc++ may set the value of these constants based on a target specific macro. Document that these constants are not ABI stable to discourage people from using them across ABI interface boundaries. LLVM Discourse discussion: https://discourse.llvm.org/t/rfc-c-17-hardware-constructive-destructive-interference-size/48674 Fixes ARM-software#387
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The std::hardware_constructive_interference and
std::hardware_destructive_interference constants are meant to represent maximum and mininum distances between concurrently accessed objects.
These values depend on the target CPU and known C++ library implementations such as libc++ and libstdc++ may set the value of these constants based on a target specific macro.
Document that these constants are not ABI stable to discourage people from using them across ABI interface boundaries.
LLVM Discourse discussion:
https://discourse.llvm.org/t/rfc-c-17-hardware-constructive-destructive-interference-size/48674
Fixes #387