| /* Thread and interpreter state structures and their interfaces */ |
| |
| |
| #ifndef Py_PYSTATE_H |
| #define Py_PYSTATE_H |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| #include "pythread.h" |
| |
| /* This limitation is for performance and simplicity. If needed it can be |
| removed (with effort). */ |
| #define MAX_CO_EXTRA_USERS 255 |
| |
| /* Forward declarations for PyFrameObject, PyThreadState |
| and PyInterpreterState */ |
| struct _frame; |
| struct _ts; |
| struct _is; |
| |
| /* struct _ts is defined in cpython/pystate.h */ |
| typedef struct _ts PyThreadState; |
| /* struct _is is defined in internal/pycore_pystate.h */ |
| typedef struct _is PyInterpreterState; |
| |
| /* State unique per thread */ |
| |
| PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_New(void); |
| PyAPI_FUNC(void) PyInterpreterState_Clear(PyInterpreterState *); |
| PyAPI_FUNC(void) PyInterpreterState_Delete(PyInterpreterState *); |
| |
| #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03070000 |
| /* New in 3.7 */ |
| PyAPI_FUNC(int64_t) PyInterpreterState_GetID(PyInterpreterState *); |
| #endif |
| #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000 |
| /* New in 3.3 */ |
| PyAPI_FUNC(int) PyState_AddModule(PyObject*, struct PyModuleDef*); |
| PyAPI_FUNC(int) PyState_RemoveModule(struct PyModuleDef*); |
| #endif |
| PyAPI_FUNC(PyObject*) PyState_FindModule(struct PyModuleDef*); |
| |
| PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *); |
| PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *); |
| PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *); |
| PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void); |
| |
| /* Get the current thread state. |
| |
| When the current thread state is NULL, this issues a fatal error (so that |
| the caller needn't check for NULL). |
| |
| The caller must hold the GIL. |
| |
| See also PyThreadState_GET() and _PyThreadState_GET(). */ |
| PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void); |
| |
| /* Get the current Python thread state. |
| |
| Macro using PyThreadState_Get() or _PyThreadState_GET() depending if |
| pycore_pystate.h is included or not (this header redefines the macro). |
| |
| If PyThreadState_Get() is used, issue a fatal error if the current thread |
| state is NULL. |
| |
| See also PyThreadState_Get() and _PyThreadState_GET(). */ |
| #define PyThreadState_GET() PyThreadState_Get() |
| |
| PyAPI_FUNC(PyThreadState *) PyThreadState_Swap(PyThreadState *); |
| PyAPI_FUNC(PyObject *) PyThreadState_GetDict(void); |
| PyAPI_FUNC(int) PyThreadState_SetAsyncExc(unsigned long, PyObject *); |
| |
| typedef |
| enum {PyGILState_LOCKED, PyGILState_UNLOCKED} |
| PyGILState_STATE; |
| |
| |
| /* Ensure that the current thread is ready to call the Python |
| C API, regardless of the current state of Python, or of its |
| thread lock. This may be called as many times as desired |
| by a thread so long as each call is matched with a call to |
| PyGILState_Release(). In general, other thread-state APIs may |
| be used between _Ensure() and _Release() calls, so long as the |
| thread-state is restored to its previous state before the Release(). |
| For example, normal use of the Py_BEGIN_ALLOW_THREADS/ |
| Py_END_ALLOW_THREADS macros are acceptable. |
| |
| The return value is an opaque "handle" to the thread state when |
| PyGILState_Ensure() was called, and must be passed to |
| PyGILState_Release() to ensure Python is left in the same state. Even |
| though recursive calls are allowed, these handles can *not* be shared - |
| each unique call to PyGILState_Ensure must save the handle for its |
| call to PyGILState_Release. |
| |
| When the function returns, the current thread will hold the GIL. |
| |
| Failure is a fatal error. |
| */ |
| PyAPI_FUNC(PyGILState_STATE) PyGILState_Ensure(void); |
| |
| /* Release any resources previously acquired. After this call, Python's |
| state will be the same as it was prior to the corresponding |
| PyGILState_Ensure() call (but generally this state will be unknown to |
| the caller, hence the use of the GILState API.) |
| |
| Every call to PyGILState_Ensure must be matched by a call to |
| PyGILState_Release on the same thread. |
| */ |
| PyAPI_FUNC(void) PyGILState_Release(PyGILState_STATE); |
| |
| /* Helper/diagnostic function - get the current thread state for |
| this thread. May return NULL if no GILState API has been used |
| on the current thread. Note that the main thread always has such a |
| thread-state, even if no auto-thread-state call has been made |
| on the main thread. |
| */ |
| PyAPI_FUNC(PyThreadState *) PyGILState_GetThisThreadState(void); |
| |
| |
| #ifndef Py_LIMITED_API |
| # define Py_CPYTHON_PYSTATE_H |
| # include "cpython/pystate.h" |
| # undef Py_CPYTHON_PYSTATE_H |
| #endif |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif /* !Py_PYSTATE_H */ |