Philippe Hausler 4886bd56e4 [Concurrency] AsyncStream and AsyncThrowingStream ...

* Rework YieldingContinuation to service values in a buffered fashion

* Fix word size calculation for locks

* Handle terminal states and finished/failed storage

* Wrap yielding continuation into a more featureful type for better ergonomics

* Hope springs eternal, maybe windows works with this?

* Prevent value overflows at .max limits

* Add a cancellation handler

* Fix series tests missing continuation parameters

* Fix series tests for mutable itertaors

* Rename to a more general name for Series's inner continuation type

* Whitespace fixes and add more commentary about public functions on Series

* Restore YieldingContinuation for now with deprecations to favor Series

* Ensure onCancel is invoked in deinit phases, and eliminate a potential for double cancellation

* Make sure ThrowingSeries has the same nonmutating setter for onCancel as Series

* Add a swath of more unit tests that exersize cancellation behavior as well as throwing behaviors

* Remove work-around for async testing

* Fixup do/catch range to properly handle ThrowingSeries test

* Address naming consistency of resume result function

* Adopt the async main test setup

* More migration of tests to new async mechanisms

* Handle the double finish/throw case

* Ensure the dependency on Dispatch is built for the series tests (due to semaphore usage)

* Add import-libdispatch to run command for Series tests

* Use non-combine based timeout intervals (portable to linux) for dispatch semaphore

* Rename Series -> AsyncStream and resume functions to just yield, and correct a missing default Element.self value

* Fix missing naming change issue for yielding an error on AsyncThrowingStream

* Remove argument label of buffering from tests

* Extract buffer and throwing variants into their own file

* Slightly refactor for only needing to store the producer instead of producer and cancel

* Rename onCancel to onTermination

* Convert handler access into a function pair

* Add finished states to the termination handler event pipeline and a disambiguation enum to identify finish versus cancel

* Ensure all termination happens before event propigation (and outside of the locks) and warn against requirements for locking on terminate and enqueue

* Modified to use Deque to back the storage and move the storage to inner types; overall perf went from 200kE/sec to over 1ME/sec

* Update stdlib/public/Concurrency/AsyncStream.swift

Co-authored-by: Doug Gregor <dgregor@apple.com>

* Update stdlib/public/Concurrency/AsyncThrowingStream.swift

Co-authored-by: Doug Gregor <dgregor@apple.com>

* Update stdlib/public/Concurrency/AsyncStream.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

* Update stdlib/public/Concurrency/AsyncThrowingStream.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

* Update stdlib/public/Concurrency/AsyncThrowingStream.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

* Update stdlib/public/Concurrency/AsyncThrowingStream.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

* Update stdlib/public/Concurrency/AsyncStream.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

* Update stdlib/public/Concurrency/AsyncThrowingStream.swift

Co-authored-by: Joseph Heck <heckj@mac.com>

* Remove local cruft for overlay disabling

* Remove local cruft for Dispatch overlay work

* Remove potential ABI impact for adding Deque

Co-authored-by: Doug Gregor <dgregor@apple.com>
Co-authored-by: Joseph Heck <heckj@mac.com>

2021-05-11 21:41:33 -07:00

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