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The purpose of the cacheline-size padding between class members is to avoid false sharing when threads modify the atomic members, but they do not have to be aligned exactly to the cacheline-size. The atomic members are very small (just 4 or 8 bytes) compared to the cacheline. As far as I can tell, their explicit alignment does not matter, they can be placed anywhere on the cacheline - we just need to ensure they are mapped to different cachelines. To avoid problems with misaligned dynamic allocation, the alignment must not be stricter than alignof(std::max_align_t), which is 16 bytes on x86_64 Linux. The value was added to the traits structs. Fixes d36u9#1
- use std::size_t instead of size_t and std::uint64_t instead of uint64_t - avoid useless static_cast<int> with an argument of the type int - avoid useless creation of std::vector<bool> which was used only for counting iterations
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The first commit fixes #1. Also added another commit with some style changes/fixes.