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[browser] JSMarshalAs(JSType.Function) support for Task #101913

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kekekeks opened this issue May 6, 2024 · 1 comment
Open

[browser] JSMarshalAs(JSType.Function) support for Task #101913

kekekeks opened this issue May 6, 2024 · 1 comment
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@pavelsavara
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arch-wasm WebAssembly architecture area-System.Runtime.InteropServices.JavaScript feature-request os-browser Browser variant of arch-wasm
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9.0.0

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@kekekeks
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kekekeks commented May 6, 2024

We actively utilize JSType.Function for JS->managed callbacks and encountering problems when trying to add support for multithreaded mode: MT requires JS->managed calls to be async, however returning Task type doesn't work for JSType.Function:

Error SYSLIB1072 : The type 'System.Func<System.Threading.Tasks.Task>' is not supported by source-generated JavaScript interop.
The generated source will not handle marshalling of parameter 'callback'.
For more information see https://aka.ms/dotnet-wasm-jsinterop
@dotnet-policy-service dotnet-policy-service bot added the untriaged New issue has not been triaged by the area owner label May 6, 2024
@kekekeks
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kekekeks commented May 6, 2024

@pavelsavara

@pavelsavara pavelsavara self-assigned this May 6, 2024
@pavelsavara pavelsavara changed the title [browser][MT] JSMarshalAs(JSType.Function) has problems with MT mode because marshaller doesn't support Task return for managed callbacks [browser] JSMarshalAs(JSType.Function) support for Task May 6, 2024
@lewing lewing added this to the 9.0.0 milestone May 6, 2024
@lewing lewing removed the untriaged New issue has not been triaged by the area owner label May 6, 2024
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arch-wasm WebAssembly architecture area-System.Runtime.InteropServices.JavaScript feature-request os-browser Browser variant of arch-wasm
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