[Python-Dev] PEP 509: Add a private version to dict (original) (raw)
Yury Selivanov yselivanov.ml at gmail.com
Thu Jan 21 00:08:57 EST 2016
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On 2016-01-20 5:01 PM, Greg Ewing wrote:
Yury Selivanov wrote:
What I propose is to add a pointer "maextra" (same 64bits), which will be set to NULL for most dict instances (instead of maversion). "maextra" can then point to a struct that has a globally unique dict ID (uint64), and a version tag (unit64). Why not just use a single global counter for allocating dict version tags, instead of one per dict?
Yeah, I think that's what we agreed on: https://mail.python.org/pipermail/python-dev/2016-January/142837.html
The only advantage of ma_extra pointer is that it allows to add more stuff to dicts in the future.
Yury
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