Revert "rt: refactor current-thread scheduler (#4377)" #4394
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This reverts commit cc8ad36.
taiki-e
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carllerche
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carllerche
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Re-applies #4377 and fixes the bug resulting in Hyper's double panic. Revert: #4394 Original PR: This PR does some refactoring to the current-thread scheduler bringing it closer to the structure of the multi-threaded scheduler. More specifically, the core scheduler data is stored in a Core struct and that struct is passed around as a "token" indicating permission to do work. The Core structure is also stored in the thread-local context. This refactor is intended to support #4373, making it easier to track counters in more locations in the current-thread scheduler. I tried to keep commits small, but the "set Core in thread-local context" is both the biggest commit and the key one.
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This reverts commit cc8ad36, which caused hyper's tests to fail.