We have to announce that we will be removing all AI tools powered by OpenAI’s paid API. OpenAI’s new policy, which forcibly expires all prepaid API credits after one year, caught us by surprise. We received no prior email notifications, and this policy change was implemented months after our initial Read more…
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We had met a bug about _emscripten_set_wheel_callback_on_thread in web app based on wasm. Relative post: https://www.weiy.city/2025/02/uncaught-typeerror-cannot-read-properties-of-null-reading-onwheel-from-_emscripten_set_wheel_callback_on_thread/ Let’s explore how was the function generated in the final wasm file. The function _emscripten_set_wheel_callback_on_thread was from emscripten_set_wheel_callback_on_thread in src/library_html5.js. Read js files and html5.h under emsdk to find the called logic. Code in Read more…
There is Aborted crash on browser when I resize window. My web app is based on VTK wasm. Check uiEventHandlerFunc in Test.js: Then we can read /emsdk/upstream/emscripten/src/library_html5.js and find registerUiEventCallback and uiEventHandlerFunc on the file. There is checkInt32(e.detail) in registerUiEventCallback in exported js file Test.js which was generated from emsdk Read more…
I encountered a crash bug on browser in a destructor of class. I found the definition of emscripten_set_wheel_callback_on_thread in `/emsdk/upstream/emscripten/src/library_html5.js`. It doesn’t check target before using it. It’s bad code. So I checked the version of emsdk: Then I upgraded emsdk to 3.1.51: Had been new version: There is a Read more…
WebAssembly’s std::thread underlying Web Workers relies on the browser, which has a strict limit on the number of Workers that can be active at the same time (usually the number of physical CPU cores, such as 4-8). Why does a two-tier loop (say 10×10) create threads that consume more resources Read more…
Here is an example about how to write stl file to wasm virtual memory and make wasm module read it. We need to add write file logic in onRuntimeInitialized for wasm module. index.html: C++ code for wasm module: binding.cpp Worker.cpp All code has been upload to GitHub: https://github.com/theArcticOcean/webLib/tree/main/threadTest
Configure the SharedArrayBuffer response header in the http.server module of the Python standard library to enable the server to support a web multithreading environment. Let’s support SharedArrayBuffer on web browser. SharedArrayBuffer is a JavaScript object that allows multiple WebWorker threads to share the same memory space. This means that different Read more…