Edit File: pystate.h
/* Thread and interpreter state structures and their interfaces */ #ifndef Py_PYSTATE_H #define Py_PYSTATE_H #ifdef __cplusplus extern "C" { #endif /* State shared between threads */ struct _ts; /* Forward */ struct _is; /* Forward */ typedef struct _is { struct _is *next; struct _ts *tstate_head; PyObject *modules; PyObject *sysdict; PyObject *builtins; PyObject *modules_reloading; PyObject *codec_search_path; PyObject *codec_search_cache; PyObject *codec_error_registry; #ifdef HAVE_DLOPEN int dlopenflags; #endif #ifdef WITH_TSC int tscdump; #endif } PyInterpreterState; /* State unique per thread */ struct _frame; /* Avoid including frameobject.h */ /* 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 typedef struct _ts { /* See Python/ceval.c for comments explaining most fields */ struct _ts *next; PyInterpreterState *interp; struct _frame *frame; int recursion_depth; /* '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 */ /* tick_counter is incremented whenever the check_interval ticker * reaches zero. The purpose is to give a useful measure of the number * of interpreted bytecode instructions in a given thread. This * extremely lightweight statistic collector may be of interest to * profilers (like psyco.jit()), although nothing in the core uses it. */ int tick_counter; 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; /* XXX signal handlers should also be here */ } PyThreadState; PyAPI_FUNC(PyInterpreterState *) PyInterpreterState_New(void); PyAPI_FUNC(void) PyInterpreterState_Clear(PyInterpreterState *); PyAPI_FUNC(void) PyInterpreterState_Delete(PyInterpreterState *); PyAPI_FUNC(PyThreadState *) PyThreadState_New(PyInterpreterState *); PyAPI_FUNC(PyThreadState *) _PyThreadState_Prealloc(PyInterpreterState *); PyAPI_FUNC(void) _PyThreadState_Init(PyThreadState *); PyAPI_FUNC(void) PyThreadState_Clear(PyThreadState *); PyAPI_FUNC(void) PyThreadState_Delete(PyThreadState *); #ifdef WITH_THREAD PyAPI_FUNC(void) PyThreadState_DeleteCurrent(void); #endif PyAPI_FUNC(PyThreadState *) PyThreadState_Get(void); 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 */ PyAPI_DATA(PyThreadState *) _PyThreadState_Current; #ifdef Py_DEBUG #define PyThreadState_GET() PyThreadState_Get() #else #define PyThreadState_GET() (_PyThreadState_Current) #endif 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); /* The implementation of sys._current_frames() Returns a dict mapping thread id to that thread's current frame. */ PyAPI_FUNC(PyObject *) _PyThread_CurrentFrames(void); /* Routines for advanced debuggers, requested by David Beazley. Don't use unless you know what you are doing! */ 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_); /* hook for PyEval_GetFrame(), requested for Psyco */ PyAPI_DATA(PyThreadFrameGetter) _PyThreadState_GetFrame; #ifdef __cplusplus } #endif #endif /* !Py_PYSTATE_H */
Back