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  1. Qt
  2. QTBUG-112916

Prototype support emscripten ASYNCIFY=2 (JSPI)

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    • Resolution: Fixed
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    • Qt RHI
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    • WebGPU for WASM

      To make an app work with JSPI on Chrome:
      1) Update to emscripten 3.1.43 (or above). Please mind that .43, as of Jun 26, is still unreleased. To get early access, apply all of the patches from sub-tasks to your emscripten.
      2) Run chrome, go to chrome://flags, look up JSPI, enable the feature, restart the browser
      3) Compile Qt for WebAssembly with -feature-wasm-exceptions
      4) Modify your app to use the following linker switches:

      -sDYNCALLS=1
-sASYNCIFY=2
-sASYNCIFY_EXPORTS=dynCall_*

      5) Run the app in Chrome modified as in 1)
      6) Enjoy JSPI!

        1.
        		 Create a simple reentrant application with emscripten on ASYNCIFY=2 Technical task Closed Mikołaj Boc (Inactive)
        2.
        		 Build Qt with JSPI on and collect problems Technical task Closed Mikołaj Boc (Inactive)
        3.
        		 Asyncify imports not handled correctly in emscripten Sub-task Closed Mikołaj Boc (Inactive)
        4.
        		 Asyncify export not handled correctly in emscripten Sub-task Closed Mikołaj Boc (Inactive)
        5.
        		 emscripten: craftInvokerFunction - crafted functions that don't return throw with JSPI Sub-task Closed Mikołaj Boc (Inactive)
        6.
        		 Make the event dispatcher work with JSPI Technical task Closed Mikołaj Boc (Inactive)
        7.
        		 Make JSPI work with -wasm-exceptions Technical task Closed Volker Hilsheimer
        For Gerrit Dashboard: QTBUG-112916
        # Subject Branch Project Status CR V
        477598,3 Adapt WASM event dispatcher to use JSPI, if available dev qt/qtbase Status: MERGED +2 0
        485750,2 Don't simulate main loop with JSPI dev qt/qtbase Status: MERGED +2 0

            mikolaj.boc Mikołaj Boc (Inactive)
            mikolaj.boc Mikołaj Boc (Inactive)
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              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes