1#ifndef Py_CONTEXT_H
2#define Py_CONTEXT_H
3#ifdef __cplusplus
4extern "C" {
5#endif
6
7#ifndef Py_LIMITED_API
8
9
10PyAPI_DATA(PyTypeObject) PyContext_Type;
11typedef struct _pycontextobject PyContext;
12
13PyAPI_DATA(PyTypeObject) PyContextVar_Type;
14typedef struct _pycontextvarobject PyContextVar;
15
16PyAPI_DATA(PyTypeObject) PyContextToken_Type;
17typedef struct _pycontexttokenobject PyContextToken;
18
19
20#define PyContext_CheckExact(o) Py_IS_TYPE(o, &PyContext_Type)
21#define PyContextVar_CheckExact(o) Py_IS_TYPE(o, &PyContextVar_Type)
22#define PyContextToken_CheckExact(o) Py_IS_TYPE(o, &PyContextToken_Type)
23
24
25PyAPI_FUNC(PyObject *) PyContext_New(void);
26PyAPI_FUNC(PyObject *) PyContext_Copy(PyObject *);
27PyAPI_FUNC(PyObject *) PyContext_CopyCurrent(void);
28
29PyAPI_FUNC(int) PyContext_Enter(PyObject *);
30PyAPI_FUNC(int) PyContext_Exit(PyObject *);
31
32
33/* Create a new context variable.
34
35 default_value can be NULL.
36*/
37PyAPI_FUNC(PyObject *) PyContextVar_New(
38 const char *name, PyObject *default_value);
39
40
41/* Get a value for the variable.
42
43 Returns -1 if an error occurred during lookup.
44
45 Returns 0 if value either was or was not found.
46
47 If value was found, *value will point to it.
48 If not, it will point to:
49
50 - default_value, if not NULL;
51 - the default value of "var", if not NULL;
52 - NULL.
53
54 '*value' will be a new ref, if not NULL.
55*/
56PyAPI_FUNC(int) PyContextVar_Get(
57 PyObject *var, PyObject *default_value, PyObject **value);
58
59
60/* Set a new value for the variable.
61 Returns NULL if an error occurs.
62*/
63PyAPI_FUNC(PyObject *) PyContextVar_Set(PyObject *var, PyObject *value);
64
65
66/* Reset a variable to its previous value.
67 Returns 0 on success, -1 on error.
68*/
69PyAPI_FUNC(int) PyContextVar_Reset(PyObject *var, PyObject *token);
70
71
72/* This method is exposed only for CPython tests. Don not use it. */
73PyAPI_FUNC(PyObject *) _PyContext_NewHamtForTests(void);
74
75
76#endif /* !Py_LIMITED_API */
77
78#ifdef __cplusplus
79}
80#endif
81#endif /* !Py_CONTEXT_H */
82

source code of include/python3.10/context.h