STINNER Victor <[email protected]> added the comment:
I removed _pending_calls.finishing for multiple reasons:
* _PyEval_AddPendingCall() used the C API whereas the caller may not hold the
GIL.
* bpo-40082: trip_signal() can be called from a thread which has no Python
thread state. On Windows, CTRL+C calls trip_signal() in a new thread a each
call.
I rewrote trip_signal() to only use the PyInterpreterState ("interp") and avoid
PyThreadState ("tstate") in PR 19441 to fix bpo-40082.
trip_signal() should read and set atomtic variables: don't modify globals
without a lock. _PyEval_AddPendingCall() is not fully async-signal safe yet :-/
Using a lock is unsafe in a signal handler.
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<https://bugs.python.org/issue37127>
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