PyV8：事件队列已满

Question

I'm using PyV8 and I get this error:

#...
  File "code\engine\window.py", line 345, in run_script
    res = self.js_context.eval(js)
error: Event queue full

I am indeed running multiple things at once. How can I get around this limitation? I haven't managed to find any mention of this anywhere... the trouble with only running on .eval() at a time is that I have javascript code calling python code which calls back into the javascript code...

Answer 1

What I ended up doing was protecting the entry points into javascript processing (from fresh python) with a threading.Lock . The require function, already being "in JS context", bypassed this lock, whereas callbacks that went back out into Python and back into JavaScript went through the lock. This seems to have done the trick for now. I wonder if that wasn't the point of PyV8.JSLocker , but it didn't seem to work well using only that class for the lock...

Answer 2

Oh boy. It's just PyV8's poor error reporting at fault. What happened is my app uses pygame, and it was posting too many pygame events (thus overflowing its queue) before dealing with them. I really wish PyV8 would show the line numbers where the error happened, in the python code called from the javascript code...