1 #ifndef Py_INTERNAL_CEVAL_H
2 #define Py_INTERNAL_CEVAL_H
3 #ifdef __cplusplus
4 extern "C" {
5 #endif
6
7 #ifndef Py_BUILD_CORE
8 # error "this header requires Py_BUILD_CORE define"
9 #endif
10
11 /* Forward declarations */
12 struct pyruntimestate;
13 struct _ceval_runtime_state;
14
15 #include "pycore_interp.h" /* PyInterpreterState.eval_frame */
16
17 extern void _Py_FinishPendingCalls(PyThreadState *tstate);
18 extern void _PyEval_InitRuntimeState(struct _ceval_runtime_state *);
19 extern int _PyEval_InitState(struct _ceval_state *ceval);
20 extern void _PyEval_FiniState(struct _ceval_state *ceval);
21 PyAPI_FUNC(void) _PyEval_SignalReceived(PyInterpreterState *interp);
22 PyAPI_FUNC(int) _PyEval_AddPendingCall(
23 PyInterpreterState *interp,
24 int (*func)(void *),
25 void *arg);
26 PyAPI_FUNC(void) _PyEval_SignalAsyncExc(PyThreadState *tstate);
27 #ifdef HAVE_FORK
28 extern void _PyEval_ReInitThreads(struct pyruntimestate *runtime);
29 #endif
30 PyAPI_FUNC(void) _PyEval_SetCoroutineOriginTrackingDepth(
31 PyThreadState *tstate,
32 int new_depth);
33
34 /* Private function */
35 void _PyEval_Fini(void);
36
37 static inline PyObject*
_PyEval_EvalFrame(PyThreadState * tstate,PyFrameObject * f,int throwflag)38 _PyEval_EvalFrame(PyThreadState *tstate, PyFrameObject *f, int throwflag)
39 {
40 return tstate->interp->eval_frame(tstate, f, throwflag);
41 }
42
43 extern PyObject *_PyEval_EvalCode(
44 PyThreadState *tstate,
45 PyObject *_co, PyObject *globals, PyObject *locals,
46 PyObject *const *args, Py_ssize_t argcount,
47 PyObject *const *kwnames, PyObject *const *kwargs,
48 Py_ssize_t kwcount, int kwstep,
49 PyObject *const *defs, Py_ssize_t defcount,
50 PyObject *kwdefs, PyObject *closure,
51 PyObject *name, PyObject *qualname);
52
53 extern int _PyEval_ThreadsInitialized(struct pyruntimestate *runtime);
54 extern PyStatus _PyEval_InitGIL(PyThreadState *tstate);
55 extern void _PyEval_FiniGIL(PyThreadState *tstate);
56
57 extern void _PyEval_ReleaseLock(PyThreadState *tstate);
58
59
60 /* --- _Py_EnterRecursiveCall() ----------------------------------------- */
61
62 PyAPI_DATA(int) _Py_CheckRecursionLimit;
63
64 #ifdef USE_STACKCHECK
65 /* With USE_STACKCHECK macro defined, trigger stack checks in
66 _Py_CheckRecursiveCall() on every 64th call to Py_EnterRecursiveCall. */
_Py_MakeRecCheck(PyThreadState * tstate)67 static inline int _Py_MakeRecCheck(PyThreadState *tstate) {
68 return (++tstate->recursion_depth > tstate->interp->ceval.recursion_limit
69 || ++tstate->stackcheck_counter > 64);
70 }
71 #else
_Py_MakeRecCheck(PyThreadState * tstate)72 static inline int _Py_MakeRecCheck(PyThreadState *tstate) {
73 return (++tstate->recursion_depth > tstate->interp->ceval.recursion_limit);
74 }
75 #endif
76
77 PyAPI_FUNC(int) _Py_CheckRecursiveCall(
78 PyThreadState *tstate,
79 const char *where);
80
_Py_EnterRecursiveCall(PyThreadState * tstate,const char * where)81 static inline int _Py_EnterRecursiveCall(PyThreadState *tstate,
82 const char *where) {
83 return (_Py_MakeRecCheck(tstate) && _Py_CheckRecursiveCall(tstate, where));
84 }
85
_Py_EnterRecursiveCall_inline(const char * where)86 static inline int _Py_EnterRecursiveCall_inline(const char *where) {
87 PyThreadState *tstate = PyThreadState_GET();
88 return _Py_EnterRecursiveCall(tstate, where);
89 }
90
91 #define Py_EnterRecursiveCall(where) _Py_EnterRecursiveCall_inline(where)
92
93 /* Compute the "lower-water mark" for a recursion limit. When
94 * Py_LeaveRecursiveCall() is called with a recursion depth below this mark,
95 * the overflowed flag is reset to 0. */
_Py_RecursionLimitLowerWaterMark(int limit)96 static inline int _Py_RecursionLimitLowerWaterMark(int limit) {
97 if (limit > 200) {
98 return (limit - 50);
99 }
100 else {
101 return (3 * (limit >> 2));
102 }
103 }
104
_Py_LeaveRecursiveCall(PyThreadState * tstate)105 static inline void _Py_LeaveRecursiveCall(PyThreadState *tstate) {
106 tstate->recursion_depth--;
107 int limit = tstate->interp->ceval.recursion_limit;
108 if (tstate->recursion_depth < _Py_RecursionLimitLowerWaterMark(limit)) {
109 tstate->overflowed = 0;
110 }
111 }
112
_Py_LeaveRecursiveCall_inline(void)113 static inline void _Py_LeaveRecursiveCall_inline(void) {
114 PyThreadState *tstate = PyThreadState_GET();
115 _Py_LeaveRecursiveCall(tstate);
116 }
117
118 #define Py_LeaveRecursiveCall() _Py_LeaveRecursiveCall_inline()
119
120
121 #ifdef __cplusplus
122 }
123 #endif
124 #endif /* !Py_INTERNAL_CEVAL_H */
125