Need Help with Pthread example

[xalteropsx]

#include <pthread.h>
#include <emscripten.h>
#include <emscripten/console.h>



#define NUM_THREADS 4

void *thread_main(void *arg)
{
    emscripten_out("hello from thread!");
    emscripten_force_exit(0);
    __builtin_trap();
}
int main(){
    return 0;
}

extern "C" {
    int delta() {
        pthread_t thread;
        pthread_create(&thread, NULL, thread_main, NULL);
        emscripten_exit_with_live_runtime();
        __builtin_trap();
        return 1;
    }
}

emcc panda.cpp -o panda.wasm -s WASM=1 -s EXPORTED_FUNCTIONS=_delta -s -pthread

WebAssembly.instantiate(panda, {}); localhost/:1 Uncaught (in promise) TypeError: WebAssembly.instantiate(): Import #3 "wasi_snapshot_preview1": module is not an object or function

if possible plz provide an good example stuck to understand why it wont work with .wasm

[kripken]

See #23506 (comment) - wasm without JS has no way to spawn threads. JS is necessary.

[kripken]

sorry, i don't understand the question

[xalteropsx]

we kinda have mounted and unmounted so example if u change page the mount will call and exit that page will call unmount

the problem since the page keep remount call like reload everything hence em-pthread spawn twice need way to terminate or close these worker
('em-pthread');

[kripken]

I'm not sure what you mean by mount/unmount. In what filesystem?

[xalteropsx]

I'm not sure what you mean by mount/unmount. In what filesystem?

bro its lifecycle hook of svelte or vue3 https://svelte.dev/playground/onmount?version=5.25.3 their is an issue they have album http broken link so it cant load but u can get idea if u have auto reload on and if u try to do something it mount back again that the issue sometime happen

[kripken]

Sorry, I don't know enough about svelte or vue

If you are stuck, perhaps try to create a small standalone testcase that shows the issue fully in a clear way.