On 17Mar2020 1803, Chris Angelico wrote:
On Wed, Mar 18, 2020 at 3:50 AM Mark Shannon wrote:
The accessibility of a thread-local variable is a strict superset of
that of a function-local variable.
Therefore storing the thread state in a thread-local variable is at
least as capable as passing t
On Wed, Mar 18, 2020 at 3:50 AM Mark Shannon wrote:
> The accessibility of a thread-local variable is a strict superset of
> that of a function-local variable.
>
> Therefore storing the thread state in a thread-local variable is at
> least as capable as passing thread-state as a parameter.
>
And
(Apologies if you're seeing this twice. I first posted to the
discourse instance.)
I first worked on a register-based virtual machine in the 1.5.2
timeframe. That was before PEP 227 (closures) landed. Prior to that,
local variables and the stack were contiguous in the f_localsplus
array. Based on
On 17/03/2020 3:38 pm, Steve Dower wrote:
On 17Mar2020 1447, Mark Shannon wrote:
On 16/03/2020 3:04 pm, Victor Stinner wrote:
In short, the answer is yes.
I said "no" then and gave reasons. AFAICT no one has faulted my
reasoning.
I said "yes" then and was also not faulted.
I'll do tha
Le mar. 17 mars 2020 à 15:49, Mark Shannon a écrit :
> > * https://bugs.python.org/issue10915
> > * https://bugs.python.org/issue15751
> >
> > It's unclear to me if fixing this issue would require to add a lock,
> > nor if it would make PyGILState_GetThisThreadState() or
> > _PyThreadState_GET() s
Le mar. 17 mars 2020 à 15:47, Mark Shannon a écrit :
> > There is no PEP but scatted documents. I wrote a short article to
> > elaborate the context of this work:
> > https://vstinner.github.io/cpython-pass-tstate.html
> >
> > One motivation is to ease the implementation of subinterpreters (PEP
>
On 17Mar2020 1447, Mark Shannon wrote:
On 16/03/2020 3:04 pm, Victor Stinner wrote:
In short, the answer is yes.
I said "no" then and gave reasons. AFAICT no one has faulted my reasoning.
I said "yes" then and was also not faulted.
Let me reiterate why using a thread-local variable is bette
On Tue, 17 Mar 2020 14:47:19 +
Mark Shannon wrote:
> On 16/03/2020 3:04 pm, Victor Stinner wrote:
> > Hi,
> >
> >> Changes on this scale merit a PEP and proper discussion, rather than
> >> being added piecemeal without proper review.
> >
> > Last November, I asked explicitly on python-de
On 16/03/2020 6:21 pm, Victor Stinner wrote:
There were quick discussions about using thread local storage (TLS) to
get and set the current Python thread state ("tstate"), instead of
reading/setting an atomic variable
(_PyRuntime.gilstate.tstate_current).
In fact, TLS already exists as "PyGILS
On 16/03/2020 3:04 pm, Victor Stinner wrote:
Hi,
Changes on this scale merit a PEP and proper discussion, rather than
being added piecemeal without proper review.
Last November, I asked explicitly on python-dev if we should "Pass the
Python thread state to internal C functions":
https://mai
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