Yury Selivanov | f23746a | 2018-01-22 19:11:18 -0500 | [diff] [blame] | 1 | #ifndef Py_CONTEXT_H |
| 2 | #define Py_CONTEXT_H |
| 3 | #ifdef __cplusplus |
| 4 | extern "C" { |
| 5 | #endif |
| 6 | |
| 7 | #ifndef Py_LIMITED_API |
| 8 | |
| 9 | |
| 10 | PyAPI_DATA(PyTypeObject) PyContext_Type; |
| 11 | typedef struct _pycontextobject PyContext; |
| 12 | |
| 13 | PyAPI_DATA(PyTypeObject) PyContextVar_Type; |
| 14 | typedef struct _pycontextvarobject PyContextVar; |
| 15 | |
| 16 | PyAPI_DATA(PyTypeObject) PyContextToken_Type; |
| 17 | typedef struct _pycontexttokenobject PyContextToken; |
| 18 | |
| 19 | |
| 20 | #define PyContext_CheckExact(o) (Py_TYPE(o) == &PyContext_Type) |
| 21 | #define PyContextVar_CheckExact(o) (Py_TYPE(o) == &PyContextVar_Type) |
| 22 | #define PyContextToken_CheckExact(o) (Py_TYPE(o) == &PyContextToken_Type) |
| 23 | |
| 24 | |
| 25 | PyAPI_FUNC(PyContext *) PyContext_New(void); |
| 26 | PyAPI_FUNC(PyContext *) PyContext_Copy(PyContext *); |
| 27 | PyAPI_FUNC(PyContext *) PyContext_CopyCurrent(void); |
| 28 | |
| 29 | PyAPI_FUNC(int) PyContext_Enter(PyContext *); |
| 30 | PyAPI_FUNC(int) PyContext_Exit(PyContext *); |
| 31 | |
| 32 | |
| 33 | /* Create a new context variable. |
| 34 | |
| 35 | default_value can be NULL. |
| 36 | */ |
| 37 | PyAPI_FUNC(PyContextVar *) 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 | */ |
| 56 | PyAPI_FUNC(int) PyContextVar_Get( |
| 57 | PyContextVar *var, PyObject *default_value, PyObject **value); |
| 58 | |
| 59 | |
| 60 | /* Set a new value for the variable. |
| 61 | Returns NULL if an error occurs. |
| 62 | */ |
| 63 | PyAPI_FUNC(PyContextToken *) PyContextVar_Set( |
| 64 | PyContextVar *var, PyObject *value); |
| 65 | |
| 66 | |
| 67 | /* Reset a variable to its previous value. |
Ville Skyttä | 61f82e0 | 2018-04-20 23:08:45 +0300 | [diff] [blame] | 68 | Returns 0 on success, -1 on error. |
Yury Selivanov | f23746a | 2018-01-22 19:11:18 -0500 | [diff] [blame] | 69 | */ |
| 70 | PyAPI_FUNC(int) PyContextVar_Reset( |
| 71 | PyContextVar *var, PyContextToken *token); |
| 72 | |
| 73 | |
| 74 | /* This method is exposed only for CPython tests. Don not use it. */ |
| 75 | PyAPI_FUNC(PyObject *) _PyContext_NewHamtForTests(void); |
| 76 | |
| 77 | |
| 78 | PyAPI_FUNC(int) PyContext_ClearFreeList(void); |
| 79 | |
| 80 | |
| 81 | #endif /* !Py_LIMITED_API */ |
| 82 | |
| 83 | #ifdef __cplusplus |
| 84 | } |
| 85 | #endif |
| 86 | #endif /* !Py_CONTEXT_H */ |