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I need a way to know when those api's are called on a context. The purpose is that at Meta we have a similar system to contextvars in C++ called folly::requestcontext. When the python context switches we need to inform C++ to swap its active context. Right now we have been carry forward patches to Asyncio.Task to do this on the _step() since way back in py3.6 which is generally the wrong place to do it.
There is prior art in #91054 which provides watching creation/destruction of Code objects. The proposed solution would mirror that functionality closely.
Has this already been discussed elsewhere?
I have already discussed this feature proposal on Discourse
Feature or enhancement
Proposal:
In python every time a context is switched, two c-api are called.
I need a way to know when those api's are called on a context. The purpose is that at Meta we have a similar system to
contextvars
in C++ calledfolly::requestcontext
. When the python context switches we need to inform C++ to swap its active context. Right now we have been carry forward patches to Asyncio.Task to do this on the_step()
since way back in py3.6 which is generally the wrong place to do it.There is prior art in #91054 which provides watching creation/destruction of Code objects. The proposed solution would mirror that functionality closely.
Has this already been discussed elsewhere?
I have already discussed this feature proposal on Discourse
Links to previous discussion of this feature:
https://discuss.python.org/t/request-can-we-get-a-c-api-hook-into-pycontext-enter-and-pycontext-exit/51730
There was an in person meeting between @gvanrossum, @itamaro and myself where we discussed the plausibility of this feature request.
Linked PRs
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