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Signed-off-by: Connor Tsui <connor.tsui20@gmail.com>
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Document guarantees of poisoning
This mostly documents the current behavior of `Mutex` and `RwLock` (rust-lang/rust#143471) as imperfect. It's unlikely that the situation improves significantly in the future, and even if it does, the rules will probably be more complicated than "poisoning is completely reliable", so this is a conservative guarantee.
We also explicitly specify that `OnceLock` never poisons, even though it has an API similar to mutexes.
Fixes rust-lang/rust#143471 by improving documentation.
r? ``@Amanieu``
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This mostly documents the current behavior of `Mutex` and `RwLock` as
imperfect. It's unlikely that the situation improves significantly in
the future, and even if it does, the rules will probably be more
complicated than "poisoning is completely reliable", so this is a
conservative guarantee.
We also explicitly specify that `OnceLock` never poisons, even though it
has an API similar to mutexes.
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1. analogous to std::cell::Ref(Mut)::filter_map.
2. doesn't imply `Try` genericizability.
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Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>
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Move some std tests to integration tests
Unit tests directly inside of standard library crates require a very fragile way of building that is hard to reproduce outside of bootstrap.
Follow up to https://github.com/rust-lang/rust/pull/133859
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This removes two minor OnceLock tests which test private methods. The
rest of the tests should be more than enough to catch mistakes in those
private methods. Also makes ReentrantLock::try_lock public. And finally
it makes the mpmc tests actually run.
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Signed-off-by: crystalstall <crystalruby@qq.com>
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