_PyOS_SigintEvent() is needed for interruptible waiting on main thread #128684
Description
Bug report
Bug description:
Moved from #108605 (comment)
In #108605, _PyOS_SigintEvent was removed from the public headers.
TensorStore relies on that function here: https://github.com/google/tensorstore/blob/eda046b10158e7d82fdb0f23aeecdfdeb8ac5aa3/python/tensorstore/future.cc#L105 to enable synchronously blocking on the readiness of a custom Future type while allowing Ctrl+C to interrupt when running on the main thread.
The current workaround is to manually declare the function since the symbol is still available.
I'm not aware of a usable alternative. Since signal.set_wakeup_fd only allows a single fd to be set globally, it isn't usable from a library. The best alternative would probably be to poll by waking up every few hundred milliseconds.
CPython versions tested on:
3.13
Operating systems tested on:
No response
Activity
vstinner commentedon Jan 13, 2025
The problem is that the "sigint event" should not be used in threads other than main. If we add a public function, it should return NULL in this case.
vstinner commentedon Feb 6, 2025
I found another user of this function by searching for
_PyOS_SigintEvent: