Fail PyGILState_Ensure() If Finalizing?

Feature or enhancement

Proposal:

Once the runtime or current interpreter starts finalizing, we currently exit or stall the current thread as soon as it tries to acquire the GIL, via PyThread_exit_thread() (or PyThread_hang_thread() after gh-105805). That includes in PyGILState_Ensure(). However, in the case of the latter it might make more sense (i.e. friendlier) for the call to fail instead of exiting/hanging the current thread.

FWIW, this is a hypothetical situation I noticed while looking at pystate.c. Also, the same scenario would be affected by gh-124619.

CC @gpshead

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-129688
• gh-130012

从 pystate.c 开始，重点关注 PyGILState_Ensure() 以及提案中描述的终结路径。先阅读链接的 PR gh-129688 和 gh-130012；当终结情况下的失败行为达成一致，而不是退出或挂起当前线程时，这项工作就完成了。