Hello,
I am writing to ask about an issue I'm facing where pthreads do not seem to
be released properly.
In my React application, I need to perform a specific task every time the
user provides keyboard input. My approach was to spawn a new thread for
each key-press and then detach it.
However, after continuous typing, the application crashes.
When I checked the Chrome debugger, I could see dozens of "em-thread"s
(Emscripten worker threads) accumulating. It appears that the threads I
create are not terminating or being cleaned up, even after their work is
complete.
The pattern I was using is as follows:
// This is called on every keyboard input
void CreateWorkerThread() {
pthread_t thread;
pthread_create(&thread, NULL, DoWork, NULL);
pthread_detach(thread);
}
void* DoWork(void* arg) {
// Perform a specific task...
// I am certain this function finishes its execution.
return NULL;
}
I have already implemented a workaround by changing my design to call
pthread_create only once (using a persistent worker thread and a message
queue), which has resolved the memory issue and the crash.
However, I am still curious why the original approach failed. Is it
expected behavior that frequently creating and detaching threads in
Emscripten will cause them to accumulate without being released? Is there a
proper way to handle this "fire-and-forget" threading pattern?
Thank you for any insights.
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