Skip to content

Combined PR to show ContextVar changes together #154647

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
nascheme wants to merge 6 commits into from
Closed

Combined PR to show ContextVar changes together #154647

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
6acba47
gh-154549: warning for thread_inherit_context change
nascheme Jul 22, 2026
b1795a7
gh-154562: Add ContextVar.thread_inheritable().
nascheme Jul 23, 2026
1f4b728
Add PyContextVar_NewThreadInheritable().
nascheme Jul 24, 2026
1e60975
Ensure decimal.getcontext() returns fresh copy.
nascheme Mar 26, 2026
1f146e6
Fix for Android/iOS CI test failure.
nascheme Jun 22, 2026
fbddda8
Use thread inheritable contextvars.
nascheme Jul 24, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Prev Previous commit
Next Next commit
Add PyContextVar_NewThreadInheritable().
  • Loading branch information
@nascheme
nascheme committed Jul 24, 2026
commit 1f4b728066716ee9b9ed72a9fd968d2fabea3afa
8 changes: 8 additions & 0 deletions Doc/c-api/contextvars.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -157,6 +157,14 @@ Context variable functions:
a default value for the context variable, or ``NULL`` for no default.
If an error has occurred, this function returns ``NULL``.

.. c:function:: PyObject *PyContextVar_NewThreadInheritable(const char *name, PyObject *def)

Create a new ``ContextVar`` object whose bindings are inherited by new
:class:`threading.Thread` instances. The parameters and return value are
the same as for :c:func:`PyContextVar_New`.

.. versionadded:: 3.16

.. c:function:: int PyContextVar_Get(PyObject *var, PyObject *default_value, PyObject **value)

Get the value of a context variable. Returns ``-1`` if an error has
Expand Down
7 changes: 7 additions & 0 deletions Include/cpython/context.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -68,6 +68,13 @@ PyAPI_FUNC(int) PyContext_ClearWatcher(int watcher_id);
PyAPI_FUNC(PyObject *) PyContextVar_New(
const char *name, PyObject *default_value);

/* Create a new thread-inheritable context variable.

default_value can be NULL.
*/
PyAPI_FUNC(PyObject *) PyContextVar_NewThreadInheritable(
const char *name, PyObject *default_value);


/* Get a value for the variable.

Expand Down
19 changes: 16 additions & 3 deletions Python/context.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -295,18 +295,31 @@ PyContext_Exit(PyObject *octx)
}


PyObject *
PyContextVar_New(const char *name, PyObject *def)
static PyObject *
contextvar_new_from_utf8(const char *name, PyObject *def,
int thread_inheritable)
{
PyObject *pyname = PyUnicode_FromString(name);
if (pyname == NULL) {
return NULL;
}
PyContextVar *var = contextvar_new(pyname, def, 0);
PyContextVar *var = contextvar_new(pyname, def, thread_inheritable);
Py_DECREF(pyname);
return (PyObject *)var;
}

PyObject *
PyContextVar_New(const char *name, PyObject *def)
{
return contextvar_new_from_utf8(name, def, 0);
}

PyObject *
PyContextVar_NewThreadInheritable(const char *name, PyObject *def)
{
return contextvar_new_from_utf8(name, def, 1);
}


int
PyContextVar_Get(PyObject *ovar, PyObject *def, PyObject **val)
Expand Down