On Wed, Nov 30, 2022 at 2:52 PM Gregory Propf <gpr...@gmail.com> wrote:
> I'm experimenting with adding web workers and pthreads to my project. I've > got some simple test code that attempts to modify objects defined in the > global scope in a web worker or a pthread. > > When the code that modifies the object runs in the WW I get > "_emval_take_value has unknown type d". My run_in_worker() function, where > this error occurs, works fine as long as I call it directly. It's only when > I attempt to post it to the worker that the binding error manifests. > I susect that embind simply doesn't work in wasm workers. wasm workers are still new/experimental (is it ok to say that @juj?) and you may find features that don't work in wasm workers. BTW you said web worker, but I think you mean wasm worker? (An important difference). > > In the pthread version it seems that some JavaScript val objects > representing DOM elements for various html tags that are defined in the > main thread do not get defined in the pthread. So we get "Cannot read > properties of undefined (reading 'value')" when trying to modify them in > the pthread. There are also some oddities about printf, cout, and > console.log where some messages that have supposedly printed do not show up > in the console output. Anyone know what all this is about and how to fix it? > The DOM only exists on the main thread, so you can't access anything DOM related on workers/pthreads. Regarding standard output, I believe normal stdout (cout/printf) is proxied back to the main thread, so might not show up if your main thread is busy. I believe that might also be true for console messages. Under node we work around this by directly writing to stdout, but I don't know of any way to do that on the web platform. Are you seeing messages completely disappear or just get delayed. > -- > You received this message because you are subscribed to the Google Groups > "emscripten-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to emscripten-discuss+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/emscripten-discuss/84bff0a5-53c6-46ee-9d39-f03f0cbf98can%40googlegroups.com > <https://groups.google.com/d/msgid/emscripten-discuss/84bff0a5-53c6-46ee-9d39-f03f0cbf98can%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-discuss+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/CAL_va28qcWzQPHj5TxPNRaB%3DHPYfSbnppySddEHD0U71o9h2Hg%40mail.gmail.com.
