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Co-authored-by: Alice Ryhl <alice@ryhl.io>
Co-authored-by: Carl Lerche <me@carllerche.com>
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Co-authored-by: Eliza Weisman <eliza@buoyant.io>
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Previously, we would fail to reset the coop budget in this case, making
it so that `coop::poll_proceed` would perpetually yield `Poll::Pending`
in nested executers even when run in `block_in_place`.
This is also a further improvement on #2645.
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Dropping a runtime normally involves waiting for any outstanding blocking tasks
to complete. When this drop happens in an asynchronous context, we previously
would issue a cryptic panic due to trying to block in an asynchronous context.
This change improves the panic message, and adds a `shutdown_blocking()` function
which can be used to shutdown a runtime without blocking at all, as an out for
cases where this really is necessary.
Co-authored-by: Bryan Donlan <bdonlan@amazon.com>
Co-authored-by: Alice Ryhl <alice@ryhl.io>
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A fast path in block_on_place was failing to call exit() in the case where we
were in a block_on call.
Fixes: #2639
Co-authored-by: Bryan Donlan <bdonlan@amazon.com>
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This enables `block_in_place` to be used in more contexts. Specifically,
it allows you to block whenever you are off the tokio runtime (like if
you are not using tokio, are in a `spawn_blocking` closure, etc.), and
in the threaded scheduler's `block_on`. Blocking in `LocalSet` and the
basic scheduler's` block_on` is still disallowed.
Fixes #2327.
Fixes #2393.
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The "global executor" thread-local is to track where to spawn new tasks,
**not** which scheduler is active on the current thread. This fixes a
bug with scheduling tasks on the basic_scheduler by tracking the
currently active basic_scheduler with a dedicated thread-local variable.
Fixes: #1851
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