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Kevin Midboe
271
v1/flask/include/python3.4m/pystate.h
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271
v1/flask/include/python3.4m/pystate.h
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/* 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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/* State shared between threads */
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struct _ts; /* Forward */
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struct _is; /* Forward */
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#ifdef Py_LIMITED_API
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typedef struct _is PyInterpreterState;
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#else
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typedef struct _is {
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struct _is *next;
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struct _ts *tstate_head;
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PyObject *modules;
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PyObject *modules_by_index;
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PyObject *sysdict;
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PyObject *builtins;
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PyObject *importlib;
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PyObject *codec_search_path;
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PyObject *codec_search_cache;
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PyObject *codec_error_registry;
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int codecs_initialized;
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int fscodec_initialized;
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#ifdef HAVE_DLOPEN
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int dlopenflags;
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#endif
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#ifdef WITH_TSC
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int tscdump;
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#endif
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PyObject *builtins_copy;
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} PyInterpreterState;
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#endif
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/* State unique per thread */
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struct _frame; /* Avoid including frameobject.h */
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#ifndef Py_LIMITED_API
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/* Py_tracefunc return -1 when raising an exception, or 0 for success. */
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typedef int (*Py_tracefunc)(PyObject *, struct _frame *, int, PyObject *);
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/* The following values are used for 'what' for tracefunc functions: */
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#define PyTrace_CALL 0
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#define PyTrace_EXCEPTION 1
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#define PyTrace_LINE 2
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#define PyTrace_RETURN 3
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#define PyTrace_C_CALL 4
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#define PyTrace_C_EXCEPTION 5
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#define PyTrace_C_RETURN 6
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#endif
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#ifdef Py_LIMITED_API
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typedef struct _ts PyThreadState;
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#else
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typedef struct _ts {
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/* See Python/ceval.c for comments explaining most fields */
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struct _ts *prev;
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struct _ts *next;
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PyInterpreterState *interp;
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struct _frame *frame;
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int recursion_depth;
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char overflowed; /* The stack has overflowed. Allow 50 more calls
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to handle the runtime error. */
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char recursion_critical; /* The current calls must not cause
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a stack overflow. */
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/* 'tracing' keeps track of the execution depth when tracing/profiling.
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This is to prevent the actual trace/profile code from being recorded in
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the trace/profile. */
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int tracing;
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int use_tracing;
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Py_tracefunc c_profilefunc;
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Py_tracefunc c_tracefunc;
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PyObject *c_profileobj;
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PyObject *c_traceobj;
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PyObject *curexc_type;
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PyObject *curexc_value;
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PyObject *curexc_traceback;
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PyObject *exc_type;
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PyObject *exc_value;
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PyObject *exc_traceback;
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PyObject *dict; /* Stores per-thread state */
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int gilstate_counter;
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PyObject *async_exc; /* Asynchronous exception to raise */
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long thread_id; /* Thread id where this tstate was created */
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int trash_delete_nesting;
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PyObject *trash_delete_later;
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/* Called when a thread state is deleted normally, but not when it
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* is destroyed after fork().
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* Pain: to prevent rare but fatal shutdown errors (issue 18808),
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* Thread.join() must wait for the join'ed thread's tstate to be unlinked
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* from the tstate chain. That happens at the end of a thread's life,
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* in pystate.c.
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* The obvious way doesn't quite work: create a lock which the tstate
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* unlinking code releases, and have Thread.join() wait to acquire that
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* lock. The problem is that we _are_ at the end of the thread's life:
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* if the thread holds the last reference to the lock, decref'ing the
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* lock will delete the lock, and that may trigger arbitrary Python code
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* if there's a weakref, with a callback, to the lock. But by this time
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* _PyThreadState_Current is already NULL, so only the simplest of C code
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* can be allowed to run (in particular it must not be possible to
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* release the GIL).
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* So instead of holding the lock directly, the tstate holds a weakref to
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* the lock: that's the value of on_delete_data below. Decref'ing a
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* weakref is harmless.
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* on_delete points to _threadmodule.c's static release_sentinel() function.
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* After the tstate is unlinked, release_sentinel is called with the
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* weakref-to-lock (on_delete_data) argument, and release_sentinel releases
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* the indirectly held lock.
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*/
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void (*on_delete)(void *);
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void *on_delete_data;
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/* XXX signal handlers should also be here */
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} PyThreadState;
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#endif
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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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PyAPI_FUNC(int) _PyState_AddModule(PyObject*, struct PyModuleDef*);
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#if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03030000
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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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#ifndef Py_LIMITED_API
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PyAPI_FUNC(void) _PyState_ClearModules(void);
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#endif
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PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *);
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PyAPI_FUNC(PyThreadState *) _PyThreadState_Prealloc(PyInterpreterState *);
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PyAPI_FUNC(void) _PyThreadState_Init(PyThreadState *);
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PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *);
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PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *);
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PyAPI_FUNC(void) _PyThreadState_DeleteExcept(PyThreadState *tstate);
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#ifdef WITH_THREAD
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PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void);
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PyAPI_FUNC(void) _PyGILState_Reinit(void);
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#endif
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PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void);
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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(long, PyObject *);
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/* Variable and macro for in-line access to current thread state */
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/* Assuming the current thread holds the GIL, this is the
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PyThreadState for the current thread. */
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#ifndef Py_LIMITED_API
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PyAPI_DATA(_Py_atomic_address) _PyThreadState_Current;
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#endif
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#if defined(Py_DEBUG) || defined(Py_LIMITED_API)
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#define PyThreadState_GET() PyThreadState_Get()
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#else
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#define PyThreadState_GET() \
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((PyThreadState*)_Py_atomic_load_relaxed(&_PyThreadState_Current))
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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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#ifdef WITH_THREAD
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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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/* Helper/diagnostic function - return 1 if the current thread
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* currently holds the GIL, 0 otherwise
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*/
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(int) PyGILState_Check(void);
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#endif
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#endif /* #ifdef WITH_THREAD */
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/* The implementation of sys._current_frames() Returns a dict mapping
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thread id to that thread's current frame.
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*/
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(PyObject *) _PyThread_CurrentFrames(void);
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#endif
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/* Routines for advanced debuggers, requested by David Beazley.
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Don't use unless you know what you are doing! */
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Head(void);
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PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Next(PyInterpreterState *);
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PyAPI_FUNC(PyThreadState *) PyInterpreterState_ThreadHead(PyInterpreterState *);
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PyAPI_FUNC(PyThreadState *) PyThreadState_Next(PyThreadState *);
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typedef struct _frame *(*PyThreadFrameGetter)(PyThreadState *self_);
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#endif
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/* hook for PyEval_GetFrame(), requested for Psyco */
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#ifndef Py_LIMITED_API
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PyAPI_DATA(PyThreadFrameGetter) _PyThreadState_GetFrame;
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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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