mirror of
https://github.com/python/cpython
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142 lines
4.8 KiB
C
142 lines
4.8 KiB
C
/* Thread and interpreter state structures and their interfaces */
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#ifndef Py_PYSTATE_H
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#define Py_PYSTATE_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* This limitation is for performance and simplicity. If needed it can be
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removed (with effort). */
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#define MAX_CO_EXTRA_USERS 255
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/* Forward declarations for PyFrameObject, PyThreadState
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and PyInterpreterState */
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struct _ts;
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struct _is;
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/* struct _ts is defined in cpython/pystate.h */
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typedef struct _ts PyThreadState;
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/* struct _is is defined in internal/pycore_interp.h */
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typedef struct _is PyInterpreterState;
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_New(void);
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PyAPI_FUNC(void) PyInterpreterState_Clear(PyInterpreterState *);
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PyAPI_FUNC(void) PyInterpreterState_Delete(PyInterpreterState *);
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03090000
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/* New in 3.9 */
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/* Get the current interpreter state.
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Issue a fatal error if there no current Python thread state or no current
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interpreter. It cannot return NULL.
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The caller must hold the GIL. */
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Get(void);
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#endif
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03080000
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/* New in 3.8 */
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PyAPI_FUNC(PyObject *) PyInterpreterState_GetDict(PyInterpreterState *);
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#endif
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03070000
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/* New in 3.7 */
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PyAPI_FUNC(int64_t) PyInterpreterState_GetID(PyInterpreterState *);
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#endif
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
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/* State unique per thread */
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/* New in 3.3 */
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PyAPI_FUNC(int) PyState_AddModule(PyObject*, struct PyModuleDef*);
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PyAPI_FUNC(int) PyState_RemoveModule(struct PyModuleDef*);
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#endif
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PyAPI_FUNC(PyObject*) PyState_FindModule(struct PyModuleDef*);
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PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *);
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PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *);
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PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *);
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/* Get the current thread state.
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When the current thread state is NULL, this issues a fatal error (so that
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the caller needn't check for NULL).
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The caller must hold the GIL.
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See also _PyThreadState_UncheckedGet() and _PyThreadState_GET(). */
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PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void);
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// Alias to PyThreadState_Get()
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#define PyThreadState_GET() PyThreadState_Get()
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PyAPI_FUNC(PyThreadState *) PyThreadState_Swap(PyThreadState *);
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PyAPI_FUNC(PyObject *) PyThreadState_GetDict(void);
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PyAPI_FUNC(int) PyThreadState_SetAsyncExc(unsigned long, PyObject *);
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03090000
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/* New in 3.9 */
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PyAPI_FUNC(PyInterpreterState*) PyThreadState_GetInterpreter(PyThreadState *tstate);
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PyAPI_FUNC(PyFrameObject*) PyThreadState_GetFrame(PyThreadState *tstate);
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PyAPI_FUNC(uint64_t) PyThreadState_GetID(PyThreadState *tstate);
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#endif
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typedef
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enum {PyGILState_LOCKED, PyGILState_UNLOCKED}
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PyGILState_STATE;
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/* Ensure that the current thread is ready to call the Python
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C API, regardless of the current state of Python, or of its
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thread lock. This may be called as many times as desired
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by a thread so long as each call is matched with a call to
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PyGILState_Release(). In general, other thread-state APIs may
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be used between _Ensure() and _Release() calls, so long as the
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thread-state is restored to its previous state before the Release().
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For example, normal use of the Py_BEGIN_ALLOW_THREADS/
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Py_END_ALLOW_THREADS macros are acceptable.
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The return value is an opaque "handle" to the thread state when
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PyGILState_Ensure() was called, and must be passed to
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PyGILState_Release() to ensure Python is left in the same state. Even
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though recursive calls are allowed, these handles can *not* be shared -
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each unique call to PyGILState_Ensure must save the handle for its
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call to PyGILState_Release.
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When the function returns, the current thread will hold the GIL.
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Failure is a fatal error.
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*/
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PyAPI_FUNC(PyGILState_STATE) PyGILState_Ensure(void);
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/* Release any resources previously acquired. After this call, Python's
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state will be the same as it was prior to the corresponding
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PyGILState_Ensure() call (but generally this state will be unknown to
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the caller, hence the use of the GILState API.)
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Every call to PyGILState_Ensure must be matched by a call to
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PyGILState_Release on the same thread.
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*/
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PyAPI_FUNC(void) PyGILState_Release(PyGILState_STATE);
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/* Helper/diagnostic function - get the current thread state for
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this thread. May return NULL if no GILState API has been used
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on the current thread. Note that the main thread always has such a
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thread-state, even if no auto-thread-state call has been made
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on the main thread.
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*/
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PyAPI_FUNC(PyThreadState *) PyGILState_GetThisThreadState(void);
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#ifndef Py_LIMITED_API
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# define Py_CPYTHON_PYSTATE_H
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# include "cpython/pystate.h"
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# undef Py_CPYTHON_PYSTATE_H
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_PYSTATE_H */
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