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GH-107803: double linked list implementation for asyncio tasks (GH-107804)

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* linked list

* add tail optmiization to linked list

* wip

* wip

* wip

* more fixes

* finally it works

* add tests

* remove weakreflist

* add some comments

* reduce code duplication in _asynciomodule.c

* address some review comments

* add invariants about the state of the linked list

* add better explanation

* clinic regen

* reorder branches for better branch prediction

* Update Modules/_asynciomodule.c

* Apply suggestions from code review

Co-authored-by: Itamar Oren <itamarost@gmail.com>

* fix capturing of eager tasks

* add comment to task finalization

* fix tests and couple c implmentation to c task

improved linked-list logic and more comments

* fix test

---------

Co-authored-by: Itamar Oren <itamarost@gmail.com>
This commit is contained in:
Kumar Aditya 2024-06-22 23:28:35 +05:30 • committed by GitHub
parent e213475495
commit 4717aaa1a7
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8 changed files with 374 additions and 96 deletions
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5
Lib/asyncio/tasks.py
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@ -1097,14 +1097,14 @@ _py_unregister_eager_task = _unregister_eager_task
_py_enter_task = _enter_task
_py_leave_task = _leave_task
_py_swap_current_task = _swap_current_task
_py_all_tasks = all_tasks
try:
from _asyncio import (_register_task, _register_eager_task,
_unregister_task, _unregister_eager_task,
_enter_task, _leave_task, _swap_current_task,
_scheduled_tasks, _eager_tasks, _current_tasks,
current_task)
current_task, all_tasks)
except ImportError:
pass
else:
@ -1116,3 +1116,4 @@ else:
_c_enter_task = _enter_task
_c_leave_task = _leave_task
_c_swap_current_task = _swap_current_task
_c_all_tasks = all_tasks