Make AtomicBool the same size as bool #33579
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Amanieu
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Note that the libs team discussed this change during triage the other day and the conclusion was that we're amenable to this with the other recent changes to |
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Make AtomicBool the same size as bool Reopening #32365 This allows `AtomicBool` to be transmuted to a `bool`, which makes it more consistent with the other atomic types. Note that this now guarantees that the atomic type will always contain a valid `bool` value, which wasn't the case before (due to `fetch_nand`). r? @alexcrichton
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@Amanieu Is this a guarantee? Like, on all platforms, all compilers, AtomicBool can be transmuted to bool? Or just specific platforms? |
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As it is currently implemented, a transmute will work fine. However I am not sure whether we should make this guarantee to users. Note that currently, atomic-rs relies on |
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When discussed with the libs team, the conclusion was that |
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Reopening #32365
This allows
AtomicBoolto be transmuted to abool, which makes it more consistent with the other atomic types. Note that this now guarantees that the atomic type will always contain a validboolvalue, which wasn't the case before (due tofetch_nand).r? @alexcrichton