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I was wondering if someone can try to implement alignas with mmap by playing with the first parameter? If not, then can anyone try to implement alignas themselves?

  • Using `mmap()` would be a runtime operation. A standard implementation of `_Alignas` is a compile-time operation. Why would you need to implement `_Alignas` rather than using what the compiler provides? – Jonathan Leffler Sep 17 '22 at 16:56
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    Please give a specific example such as "I want to heap allocate a 5 KB object with 64 byte alignment on x86-64." So far this sounds like an X-Y-I-don't know problem. – John Zwinck Sep 17 '22 at 17:11
  • To do this dynamically, how about `posix_memalign`? – Craig Estey Sep 17 '22 at 17:23

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