[3.6] bpo-30808: Use _Py_atomic API for concurrency-sensitive signal state (GH-2417)#3007
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…state (pythonGH-2417) * Improve signal delivery Avoid using Py_AddPendingCall from signal handler, to avoid calling signal-unsafe functions. * Remove unused function * Improve comments * Use _Py_atomic API for concurrency-sensitive signal state * Add blurb (cherry picked from commit 2c8a5e4)
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https://bugs.python.org/issue30808