API refactor

venv/lib/python3.12/site-packages/structlog/contextvars.py

@@ -11,6 +11,8 @@ Python 3.7 as :mod:`contextvars`.
 .. versionchanged:: 21.1.0
    Reimplemented without using a single dict as context carrier for improved
    isolation. Every key-value pair is a separate `contextvars.ContextVar` now.
+.. versionchanged:: 23.3.0
+   Callsite parameters are now also collected under asyncio.
 
 See :doc:`contextvars`.
 """
@@ -20,6 +22,7 @@ from __future__ import annotations
 import contextlib
 import contextvars
 
+from types import FrameType
 from typing import Any, Generator, Mapping
 
 import structlog
@@ -30,6 +33,10 @@ from .typing import BindableLogger, EventDict, WrappedLogger
 STRUCTLOG_KEY_PREFIX = "structlog_"
 STRUCTLOG_KEY_PREFIX_LEN = len(STRUCTLOG_KEY_PREFIX)
 
+_ASYNC_CALLING_STACK: contextvars.ContextVar[FrameType] = (
+    contextvars.ContextVar("_ASYNC_CALLING_STACK")
+)
+
 # For proper isolation, we have to use a dict of ContextVars instead of a
 # single ContextVar with a dict.
 # See https://github.com/hynek/structlog/pull/302 for details.