[Python-Dev] Const access to CPython objects outside of GIL? (original) (raw)
Antoine Pitrou solipsis at pitrou.net
Tue Jul 17 04:27:27 EDT 2018
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On Tue, 17 Jul 2018 00:15:04 -0500 Tim Peters <tim.peters at gmail.com> wrote:
> More generally, what is the CPython 2.7/3.5 contract regarding (lack of) > object mutation, and the need for reference counting and synchronization > via GIL?
There is no intention to support GIL-free access to any Python objects. So that's the contract: "All warranties are null & void if you do just about anything while not holding the GIL".
Actually, accessing a Py_buffer that's been obtained in the regular way (e.g. with PyObject_GetBuffer) is safe even without the GIL.
Regards
Antoine.
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