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Add cooperative threads
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‎README.md

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@@ -15,7 +15,8 @@ reference interpreter and test suite.
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The Component Model is currently being incrementally developed and stabilized
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as part of [WASI Preview 2]. The subsequent [WASI Preview 3] milestone will be
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primarily concerned with the addition of [async support][Concurrency Model].
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primarily concerned with the addition of [native concurrency
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support][concurrency model].
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## Contributing
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@@ -32,11 +33,10 @@ To contribute to any of these repositories, see the Community Group's
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[IDL]: design/mvp/WIT.md
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[Text Format]: design/mvp/Explainer.md
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[Binary Format]: design/mvp/Binary.md
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[Concurrency Model]: design/mvp/Async.md
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[Concurrency Model]: design/mvp/Concurrency.md
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[Canonical ABI]: design/mvp/CanonicalABI.md
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[formal spec]: spec/
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[W3C WebAssembly Community Group]: https://www.w3.org/community/webassembly/
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[Contributing Guidelines]: https://webassembly.org/community/contributing/
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[WASI Preview 2]: https://github.com/WebAssembly/WASI/tree/main/wasip2#readme
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[WASI Preview 3]: https://github.com/WebAssembly/WASI/tree/main/wasip2#looking-forward-to-preview-3
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[Async Support]: https://docs.google.com/presentation/d/1MNVOZ8hdofO3tI0szg_i-Yoy0N2QPU2C--LzVuoGSlE/edit?usp=share_link

‎design/mvp/Binary.md

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@@ -214,7 +214,7 @@ label' ::= len:<u32> l:<label> => l (if len = |l|)
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valtype ::= i:<typeidx> => i
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| pvt:<primvaltype> => pvt
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resourcetype ::= 0x3f 0x7f f?:<funcidx>? => (resource (rep i32) (dtor f)?)
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| 0x3e 0x7f f:<funcidx> cb?:<funcidx>? => (resource (rep i32) (dtor async f (callback cb)?)) 🚝
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| 0x3e 0x7f f:<funcidx> cb?:<funcidx>? => (resource (rep i32) (dtor async f (callback cb)?)) 🧵
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functype ::= 0x40 ps:<paramlist> rs:<resultlist> => (func ps rs)
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paramlist ::= lt*:vec(<labelvaltype>) => (param lt)*
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resultlist ::= 0x00 t:<valtype> => (result t)
@@ -288,14 +288,13 @@ canon ::= 0x00 0x00 f:<core:funcidx> opts:<opts> ft:<typeidx> => (canon lift
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| 0x01 0x00 f:<funcidx> opts:<opts> => (canon lower f opts (core func))
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| 0x02 rt:<typeidx> => (canon resource.new rt (core func))
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| 0x03 rt:<typeidx> => (canon resource.drop rt (core func))
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| 0x07 rt:<typeidx> => (canon resource.drop rt async (core func)) 🚝
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| 0x07 rt:<typeidx> => (canon resource.drop rt async (core func)) 🧵
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| 0x04 rt:<typeidx> => (canon resource.rep rt (core func))
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| 0x08 => (canon backpressure.set (core func)) 🔀
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| 0x09 rs:<resultlist> opts:<opts> => (canon task.return rs opts (core func)) 🔀
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| 0x05 => (canon task.cancel (core func)) 🔀
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| 0x0a 0x7f i:<u32> => (canon context.get i32 i (core func)) 🔀
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| 0x0b 0x7f i:<u32> => (canon context.set i32 i (core func)) 🔀
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| 0x0c cancel?:<cancel?> => (canon yield cancel? (core func)) 🔀
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| 0x06 async?:<async?> => (canon subtask.cancel async? (core func)) 🔀
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| 0x0d => (canon subtask.drop (core func)) 🔀
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| 0x0e t:<typeidx> => (canon stream.new t (core func)) 🔀
@@ -320,13 +319,20 @@ canon ::= 0x00 0x00 f:<core:funcidx> opts:<opts> ft:<typeidx> => (canon lift
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| 0x21 cancel?:<cancel?> m:<core:memidx> => (canon waitable-set.poll cancel? (memory m) (core func)) 🔀
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| 0x22 => (canon waitable-set.drop (core func)) 🔀
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| 0x23 => (canon waitable.join (core func)) 🔀
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| 0x40 ft:<typeidx> => (canon thread.spawn_ref ft (core func)) 🧵
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| 0x41 ft:<typeidx> tbl:<core:tableidx> => (canon thread.spawn_indirect ft tbl (core func)) 🧵
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| 0x42 => (canon thread.available_parallelism (core func)) 🧵
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| 0x24 => (canon thread.index (core func)) 🧵
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| 0x25 ft:<typeidx> tbl:<core:tableidx> => (canon thread.new_indirect ft tbl (core func)) 🧵
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| 0x26 cancel?:<cancel?> => (canon thread.switch-to cancel? (core func)) 🧵
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| 0x27 cancel?:<cancel?> => (canon thread.suspend cancel? (core func)) 🧵
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| 0x28 => (canon thread.resume-later (core func)) 🧵
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| 0x29 cancel?:<cancel?> => (canon thread.yield-to cancel? (core func)) 🧵
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| 0x0c cancel?:<cancel?> => (canon thread.yield cancel? (core func)) 🔀
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| 0x40 ft:<typeidx> => (canon thread.spawn_ref ft (core func)) 🧵②
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| 0x41 ft:<typeidx> tbl:<core:tableidx> => (canon thread.spawn_indirect ft tbl (core func)) 🧵②
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| 0x42 => (canon thread.available-parallelism (core func)) 🧵②
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async? ::= 0x00 =>
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| 0x01 => async
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cancel? ::= 0x00 =>
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| 0x01 => cancellable 🚟
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| 0x01 => cancellable 🧵
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opts ::= opt*:vec(<canonopt>) => opt*
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canonopt ::= 0x00 => string-encoding=utf8
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| 0x01 => string-encoding=utf16
@@ -509,6 +515,8 @@ named once.
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repurposed.
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* Most built-ins should have a `<canonopt>*` immediate instead of an ad hoc
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subset of `canonopt`s.
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* Add optional `shared` immediate to all canonical definitions (explicitly or
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via `<canonopt>`)
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[`core:byte`]: https://webassembly.github.io/spec/core/binary/values.html#binary-byte

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