+++ /dev/null
-
-/* Thread and interpreter state structures and their interfaces */
-
-
-#ifndef Py_PYSTATE_H
-#define Py_PYSTATE_H
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/* This limitation is for performance and simplicity. If needed it can be
-removed (with effort). */
-#define MAX_CO_EXTRA_USERS 255
-
-/* State shared between threads */
-
-struct _ts; /* Forward */
-struct _is; /* Forward */
-struct _frame; /* Forward declaration for PyFrameObject. */
-
-#ifdef Py_LIMITED_API
-typedef struct _is PyInterpreterState;
-#else
-typedef PyObject* (*_PyFrameEvalFunction)(struct _frame *, int);
-
-typedef struct _is {
-
- struct _is *next;
- struct _ts *tstate_head;
-
- PyObject *modules;
- PyObject *modules_by_index;
- PyObject *sysdict;
- PyObject *builtins;
- PyObject *importlib;
-
- PyObject *codec_search_path;
- PyObject *codec_search_cache;
- PyObject *codec_error_registry;
- int codecs_initialized;
- int fscodec_initialized;
-
-#ifdef HAVE_DLOPEN
- int dlopenflags;
-#endif
-
- PyObject *builtins_copy;
- PyObject *import_func;
- /* Initialized to PyEval_EvalFrameDefault(). */
- _PyFrameEvalFunction eval_frame;
-} PyInterpreterState;
-#endif
-
-
-/* State unique per thread */
-
-#ifndef Py_LIMITED_API
-/* Py_tracefunc return -1 when raising an exception, or 0 for success. */
-typedef int (*Py_tracefunc)(PyObject *, struct _frame *, int, PyObject *);
-
-/* The following values are used for 'what' for tracefunc functions: */
-#define PyTrace_CALL 0
-#define PyTrace_EXCEPTION 1
-#define PyTrace_LINE 2
-#define PyTrace_RETURN 3
-#define PyTrace_C_CALL 4
-#define PyTrace_C_EXCEPTION 5
-#define PyTrace_C_RETURN 6
-#endif
-
-#ifdef Py_LIMITED_API
-typedef struct _ts PyThreadState;
-#else
-typedef struct _ts {
- /* See Python/ceval.c for comments explaining most fields */
-
- struct _ts *prev;
- struct _ts *next;
- PyInterpreterState *interp;
-
- struct _frame *frame;
- int recursion_depth;
- char overflowed; /* The stack has overflowed. Allow 50 more calls
- to handle the runtime error. */
- char recursion_critical; /* The current calls must not cause
- a stack overflow. */
- /* 'tracing' keeps track of the execution depth when tracing/profiling.
- This is to prevent the actual trace/profile code from being recorded in
- the trace/profile. */
- int tracing;
- int use_tracing;
-
- Py_tracefunc c_profilefunc;
- Py_tracefunc c_tracefunc;
- PyObject *c_profileobj;
- PyObject *c_traceobj;
-
- PyObject *curexc_type;
- PyObject *curexc_value;
- PyObject *curexc_traceback;
-
- PyObject *exc_type;
- PyObject *exc_value;
- PyObject *exc_traceback;
-
- PyObject *dict; /* Stores per-thread state */
-
- int gilstate_counter;
-
- PyObject *async_exc; /* Asynchronous exception to raise */
- long thread_id; /* Thread id where this tstate was created */
-
- int trash_delete_nesting;
- PyObject *trash_delete_later;
-
- /* Called when a thread state is deleted normally, but not when it
- * is destroyed after fork().
- * Pain: to prevent rare but fatal shutdown errors (issue 18808),
- * Thread.join() must wait for the join'ed thread's tstate to be unlinked
- * from the tstate chain. That happens at the end of a thread's life,
- * in pystate.c.
- * The obvious way doesn't quite work: create a lock which the tstate
- * unlinking code releases, and have Thread.join() wait to acquire that
- * lock. The problem is that we _are_ at the end of the thread's life:
- * if the thread holds the last reference to the lock, decref'ing the
- * lock will delete the lock, and that may trigger arbitrary Python code
- * if there's a weakref, with a callback, to the lock. But by this time
- * _PyThreadState_Current is already NULL, so only the simplest of C code
- * can be allowed to run (in particular it must not be possible to
- * release the GIL).
- * So instead of holding the lock directly, the tstate holds a weakref to
- * the lock: that's the value of on_delete_data below. Decref'ing a
- * weakref is harmless.
- * on_delete points to _threadmodule.c's static release_sentinel() function.
- * After the tstate is unlinked, release_sentinel is called with the
- * weakref-to-lock (on_delete_data) argument, and release_sentinel releases
- * the indirectly held lock.
- */
- void (*on_delete)(void *);
- void *on_delete_data;
-
- PyObject *coroutine_wrapper;
- int in_coroutine_wrapper;
-
- Py_ssize_t co_extra_user_count;
- freefunc co_extra_freefuncs[MAX_CO_EXTRA_USERS];
-
- PyObject *async_gen_firstiter;
- PyObject *async_gen_finalizer;
-
- /* XXX signal handlers should also be here */
-
-} PyThreadState;
-#endif
-
-
-PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_New(void);
-PyAPI_FUNC(void) PyInterpreterState_Clear(PyInterpreterState *);
-PyAPI_FUNC(void) PyInterpreterState_Delete(PyInterpreterState *);
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(int) _PyState_AddModule(PyObject*, struct PyModuleDef*);
-#endif /* !Py_LIMITED_API */
-#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*);
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(void) _PyState_ClearModules(void);
-#endif
-
-PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *);
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(PyThreadState *) _PyThreadState_Prealloc(PyInterpreterState *);
-PyAPI_FUNC(void) _PyThreadState_Init(PyThreadState *);
-#endif /* !Py_LIMITED_API */
-PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *);
-PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *);
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(void) _PyThreadState_DeleteExcept(PyThreadState *tstate);
-#endif /* !Py_LIMITED_API */
-#ifdef WITH_THREAD
-PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void);
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(void) _PyGILState_Reinit(void);
-#endif /* !Py_LIMITED_API */
-#endif
-
-/* Return the current thread state. The global interpreter lock must be held.
- * When the current thread state is NULL, this issues a fatal error (so that
- * the caller needn't check for NULL). */
-PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void);
-
-#ifndef Py_LIMITED_API
-/* Similar to PyThreadState_Get(), but don't issue a fatal error
- * if it is NULL. */
-PyAPI_FUNC(PyThreadState *) _PyThreadState_UncheckedGet(void);
-#endif /* !Py_LIMITED_API */
-
-PyAPI_FUNC(PyThreadState *) PyThreadState_Swap(PyThreadState *);
-PyAPI_FUNC(PyObject *) PyThreadState_GetDict(void);
-PyAPI_FUNC(int) PyThreadState_SetAsyncExc(long, PyObject *);
-
-
-/* Variable and macro for in-line access to current thread state */
-
-/* Assuming the current thread holds the GIL, this is the
- PyThreadState for the current thread. */
-#ifdef Py_BUILD_CORE
-PyAPI_DATA(_Py_atomic_address) _PyThreadState_Current;
-# define PyThreadState_GET() \
- ((PyThreadState*)_Py_atomic_load_relaxed(&_PyThreadState_Current))
-#else
-# define PyThreadState_GET() PyThreadState_Get()
-#endif
-
-typedef
- enum {PyGILState_LOCKED, PyGILState_UNLOCKED}
- PyGILState_STATE;
-
-#ifdef WITH_THREAD
-
-/* 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
-/* Issue #26558: Flag to disable PyGILState_Check().
- If set to non-zero, PyGILState_Check() always return 1. */
-PyAPI_DATA(int) _PyGILState_check_enabled;
-
-/* Helper/diagnostic function - return 1 if the current thread
- currently holds the GIL, 0 otherwise.
-
- The function returns 1 if _PyGILState_check_enabled is non-zero. */
-PyAPI_FUNC(int) PyGILState_Check(void);
-
-/* Unsafe function to get the single PyInterpreterState used by this process'
- GILState implementation.
-
- Return NULL before _PyGILState_Init() is called and after _PyGILState_Fini()
- is called. */
-PyAPI_FUNC(PyInterpreterState *) _PyGILState_GetInterpreterStateUnsafe(void);
-#endif
-
-#endif /* #ifdef WITH_THREAD */
-
-/* The implementation of sys._current_frames() Returns a dict mapping
- thread id to that thread's current frame.
-*/
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(PyObject *) _PyThread_CurrentFrames(void);
-#endif
-
-/* Routines for advanced debuggers, requested by David Beazley.
- Don't use unless you know what you are doing! */
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Head(void);
-PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_Next(PyInterpreterState *);
-PyAPI_FUNC(PyThreadState *) PyInterpreterState_ThreadHead(PyInterpreterState *);
-PyAPI_FUNC(PyThreadState *) PyThreadState_Next(PyThreadState *);
-
-typedef struct _frame *(*PyThreadFrameGetter)(PyThreadState *self_);
-#endif
-
-/* hook for PyEval_GetFrame(), requested for Psyco */
-#ifndef Py_LIMITED_API
-PyAPI_DATA(PyThreadFrameGetter) _PyThreadState_GetFrame;
-#endif
-
-#ifdef __cplusplus
-}
-#endif
-#endif /* !Py_PYSTATE_H */
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