Make it possible to compare threads #1435
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Should be pretty simple - |
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There has been a bunch of attempts to implement this already: Also see: |
nrc
added
the
T-libs-api
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@alexcrichton your comment in one of the implementation attempts suggests that |
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Threads themselves are somewhat more opaque and it's in general just a little more flexible to deal with ids instead of threads themselves. We could also lower the |
Add ThreadId for comparing threads This adds the capability to store and compare threads with the current calling thread via a new struct, `std::thread::ThreadId`. Addresses the need outlined in issue #21507. This avoids the need to add any special checks to the existing thread structs and does not rely on the system to provide an identifier for a thread, since it seems that this approach is unreliable and undesirable. Instead, this simply uses a lazily-created, thread-local `usize` whose value is copied from a global atomic counter. The code should be simple enough that it should be as much reliable as the `#[thread_local]` attribute it uses (however much that is). `ThreadId`s can be compared directly for equality and have copy semantics. Also see these other attempts: - #29457 - #29448 - #29447 And this in the RFC repo: rust-lang/rfcs#1435
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Objects of type
Threadcan't be compared. There's no way to know if you are still in the same thread as you were before.I don't know if this should just be an implementation of
EqonThread, or if a newThreadIdtype would need to be created.The text was updated successfully, but these errors were encountered: