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Implementation: `#[feature(sync_nonpoison)]`, `#[feature(nonpoison_mutex)]` Continuation of https://github.com/rust-lang/rust/pull/134663 Tracking Issue: https://github.com/rust-lang/rust/issues/134645 This PR implements a new `sync/nonpoison` module, as well as the `nonpoison` variant of the `Mutex` lock. There are 2 main changes here, the first is the new `nonpoison::mutex` module, and the second is the `mutex` integration tests. For the `nonpoison::mutex` module, I did my best to align it with the current state of the `poison::mutex` module. This means that several unstable features (`mapped_lock_guards`, `lock_value_accessors`, and `mutex_data_ptr`) are also in the new `nonpoison::mutex` module, under their respective feature gates. Everything else in that file is under the correct feature gate (`#[unstable(feature = "nonpoison_mutex", issue = "134645")]`). Everything in the `nonpoison::mutex` file is essentially identical in spirit, as we are simply removing the error case from the original `poison::mutex`. The second big change is in the integration tests. I created a macro called that allows us to duplicate tests that are "generic" over the different mutex types, in that the poison mutex is always `unwrap`ped. ~~I think that there is an argument against doing this, as it can make the tests a bit harder to understand (and language server capabilities are weaker within macros), but I think the benefit of code deduplication here is worth it. Note that it is definitely possible to generalize this (with a few tweaks) to testing the other `nonpoison` locks when they eventually get implemented, but I'll leave that for a later discussion.~~ |
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