1 # Thread and interpreter state structures and their interfaces
3 from cpython.ref cimport PyObject
5 cdef extern from "Python.h":
7 # We make these an opague types. If the user wants specific attributes,
8 # they can be declared manually.
10 ctypedef struct PyInterpreterState:
13 ctypedef struct PyThreadState:
16 ctypedef struct PyFrameObject:
19 # This is not actually a struct, but make sure it can never be coerced to
20 # an int or used in arithmetic expressions
21 ctypedef struct PyGILState_STATE
23 # The type of the trace function registered using PyEval_SetProfile() and
25 # Py_tracefunc return -1 when raising an exception, or 0 for success.
26 ctypedef int (*Py_tracefunc)(PyObject *, PyFrameObject *, int, PyObject *)
28 # The following values are used for 'what' for tracefunc functions
39 PyInterpreterState * PyInterpreterState_New()
40 void PyInterpreterState_Clear(PyInterpreterState *)
41 void PyInterpreterState_Delete(PyInterpreterState *)
43 PyThreadState * PyThreadState_New(PyInterpreterState *)
44 void PyThreadState_Clear(PyThreadState *)
45 void PyThreadState_Delete(PyThreadState *)
47 PyThreadState * PyThreadState_Get()
48 PyThreadState * PyThreadState_Swap(PyThreadState *)
49 PyObject * PyThreadState_GetDict()
50 int PyThreadState_SetAsyncExc(long, PyObject *)
52 # Ensure that the current thread is ready to call the Python
53 # C API, regardless of the current state of Python, or of its
54 # thread lock. This may be called as many times as desired
55 # by a thread so long as each call is matched with a call to
56 # PyGILState_Release(). In general, other thread-state APIs may
57 # be used between _Ensure() and _Release() calls, so long as the
58 # thread-state is restored to its previous state before the Release().
59 # For example, normal use of the Py_BEGIN_ALLOW_THREADS/
60 # Py_END_ALLOW_THREADS macros are acceptable.
62 # The return value is an opaque "handle" to the thread state when
63 # PyGILState_Ensure() was called, and must be passed to
64 # PyGILState_Release() to ensure Python is left in the same state. Even
65 # though recursive calls are allowed, these handles can *not* be shared -
66 # each unique call to PyGILState_Ensure must save the handle for its
67 # call to PyGILState_Release.
69 # When the function returns, the current thread will hold the GIL.
71 # Failure is a fatal error.
72 PyGILState_STATE PyGILState_Ensure()
74 # Release any resources previously acquired. After this call, Python's
75 # state will be the same as it was prior to the corresponding
76 # PyGILState_Ensure() call (but generally this state will be unknown to
77 # the caller, hence the use of the GILState API.)
79 # Every call to PyGILState_Ensure must be matched by a call to
80 # PyGILState_Release on the same thread.
81 void PyGILState_Release(PyGILState_STATE)
83 # Routines for advanced debuggers, requested by David Beazley.
84 # Don't use unless you know what you are doing!
85 PyInterpreterState * PyInterpreterState_Head()
86 PyInterpreterState * PyInterpreterState_Next(PyInterpreterState *)
87 PyThreadState * PyInterpreterState_ThreadHead(PyInterpreterState *)
88 PyThreadState * PyThreadState_Next(PyThreadState *)