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1 | #ifndef Py_CEVAL_H |
2 | #define Py_CEVAL_H | |
3 | #ifdef __cplusplus | |
4 | extern "C" { | |
5 | #endif | |
6 | ||
7 | ||
8 | /* Interface to random parts in ceval.c */ | |
9 | ||
10 | PyAPI_FUNC(PyObject *) PyEval_CallObjectWithKeywords( | |
11 | PyObject *, PyObject *, PyObject *); | |
12 | ||
13 | /* DLL-level Backwards compatibility: */ | |
14 | #undef PyEval_CallObject | |
15 | PyAPI_FUNC(PyObject *) PyEval_CallObject(PyObject *, PyObject *); | |
16 | ||
17 | /* Inline this */ | |
18 | #define PyEval_CallObject(func,arg) \ | |
19 | PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL) | |
20 | ||
21 | PyAPI_FUNC(PyObject *) PyEval_CallFunction(PyObject *obj, char *format, ...); | |
22 | PyAPI_FUNC(PyObject *) PyEval_CallMethod(PyObject *obj, | |
23 | char *methodname, char *format, ...); | |
24 | ||
25 | PyAPI_FUNC(void) PyEval_SetProfile(Py_tracefunc, PyObject *); | |
26 | PyAPI_FUNC(void) PyEval_SetTrace(Py_tracefunc, PyObject *); | |
27 | ||
28 | struct _frame; /* Avoid including frameobject.h */ | |
29 | ||
30 | PyAPI_FUNC(PyObject *) PyEval_GetBuiltins(void); | |
31 | PyAPI_FUNC(PyObject *) PyEval_GetGlobals(void); | |
32 | PyAPI_FUNC(PyObject *) PyEval_GetLocals(void); | |
33 | PyAPI_FUNC(struct _frame *) PyEval_GetFrame(void); | |
34 | PyAPI_FUNC(int) PyEval_GetRestricted(void); | |
35 | ||
36 | /* Look at the current frame's (if any) code's co_flags, and turn on | |
37 | the corresponding compiler flags in cf->cf_flags. Return 1 if any | |
38 | flag was set, else return 0. */ | |
39 | PyAPI_FUNC(int) PyEval_MergeCompilerFlags(PyCompilerFlags *cf); | |
40 | ||
41 | PyAPI_FUNC(int) Py_FlushLine(void); | |
42 | ||
43 | PyAPI_FUNC(int) Py_AddPendingCall(int (*func)(void *), void *arg); | |
44 | PyAPI_FUNC(int) Py_MakePendingCalls(void); | |
45 | ||
46 | /* Protection against deeply nested recursive calls */ | |
47 | PyAPI_FUNC(void) Py_SetRecursionLimit(int); | |
48 | PyAPI_FUNC(int) Py_GetRecursionLimit(void); | |
49 | ||
50 | #define Py_EnterRecursiveCall(where) \ | |
51 | (_Py_MakeRecCheck(PyThreadState_GET()->recursion_depth) && \ | |
52 | _Py_CheckRecursiveCall(where)) | |
53 | #define Py_LeaveRecursiveCall() \ | |
54 | (--PyThreadState_GET()->recursion_depth) | |
55 | PyAPI_FUNC(int) _Py_CheckRecursiveCall(char *where); | |
56 | PyAPI_DATA(int) _Py_CheckRecursionLimit; | |
57 | #ifdef USE_STACKCHECK | |
58 | # define _Py_MakeRecCheck(x) (++(x) > --_Py_CheckRecursionLimit) | |
59 | #else | |
60 | # define _Py_MakeRecCheck(x) (++(x) > _Py_CheckRecursionLimit) | |
61 | #endif | |
62 | ||
63 | PyAPI_FUNC(char *) PyEval_GetFuncName(PyObject *); | |
64 | PyAPI_FUNC(char *) PyEval_GetFuncDesc(PyObject *); | |
65 | ||
66 | PyAPI_FUNC(PyObject *) PyEval_GetCallStats(PyObject *); | |
67 | PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *); | |
68 | ||
69 | /* this used to be handled on a per-thread basis - now just two globals */ | |
70 | PyAPI_DATA(volatile int) _Py_Ticker; | |
71 | PyAPI_DATA(int) _Py_CheckInterval; | |
72 | ||
73 | /* Interface for threads. | |
74 | ||
75 | A module that plans to do a blocking system call (or something else | |
76 | that lasts a long time and doesn't touch Python data) can allow other | |
77 | threads to run as follows: | |
78 | ||
79 | ...preparations here... | |
80 | Py_BEGIN_ALLOW_THREADS | |
81 | ...blocking system call here... | |
82 | Py_END_ALLOW_THREADS | |
83 | ...interpret result here... | |
84 | ||
85 | The Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS pair expands to a | |
86 | {}-surrounded block. | |
87 | To leave the block in the middle (e.g., with return), you must insert | |
88 | a line containing Py_BLOCK_THREADS before the return, e.g. | |
89 | ||
90 | if (...premature_exit...) { | |
91 | Py_BLOCK_THREADS | |
92 | PyErr_SetFromErrno(PyExc_IOError); | |
93 | return NULL; | |
94 | } | |
95 | ||
96 | An alternative is: | |
97 | ||
98 | Py_BLOCK_THREADS | |
99 | if (...premature_exit...) { | |
100 | PyErr_SetFromErrno(PyExc_IOError); | |
101 | return NULL; | |
102 | } | |
103 | Py_UNBLOCK_THREADS | |
104 | ||
105 | For convenience, that the value of 'errno' is restored across | |
106 | Py_END_ALLOW_THREADS and Py_BLOCK_THREADS. | |
107 | ||
108 | WARNING: NEVER NEST CALLS TO Py_BEGIN_ALLOW_THREADS AND | |
109 | Py_END_ALLOW_THREADS!!! | |
110 | ||
111 | The function PyEval_InitThreads() should be called only from | |
112 | initthread() in "threadmodule.c". | |
113 | ||
114 | Note that not yet all candidates have been converted to use this | |
115 | mechanism! | |
116 | */ | |
117 | ||
118 | PyAPI_FUNC(PyThreadState *) PyEval_SaveThread(void); | |
119 | PyAPI_FUNC(void) PyEval_RestoreThread(PyThreadState *); | |
120 | ||
121 | #ifdef WITH_THREAD | |
122 | ||
123 | PyAPI_FUNC(int) PyEval_ThreadsInitialized(void); | |
124 | PyAPI_FUNC(void) PyEval_InitThreads(void); | |
125 | PyAPI_FUNC(void) PyEval_AcquireLock(void); | |
126 | PyAPI_FUNC(void) PyEval_ReleaseLock(void); | |
127 | PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate); | |
128 | PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate); | |
129 | PyAPI_FUNC(void) PyEval_ReInitThreads(void); | |
130 | ||
131 | #define Py_BEGIN_ALLOW_THREADS { \ | |
132 | PyThreadState *_save; \ | |
133 | _save = PyEval_SaveThread(); | |
134 | #define Py_BLOCK_THREADS PyEval_RestoreThread(_save); | |
135 | #define Py_UNBLOCK_THREADS _save = PyEval_SaveThread(); | |
136 | #define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \ | |
137 | } | |
138 | ||
139 | #else /* !WITH_THREAD */ | |
140 | ||
141 | #define Py_BEGIN_ALLOW_THREADS { | |
142 | #define Py_BLOCK_THREADS | |
143 | #define Py_UNBLOCK_THREADS | |
144 | #define Py_END_ALLOW_THREADS } | |
145 | ||
146 | #endif /* !WITH_THREAD */ | |
147 | ||
148 | PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, int *); | |
149 | ||
150 | ||
151 | #ifdef __cplusplus | |
152 | } | |
153 | #endif | |
154 | #endif /* !Py_CEVAL_H */ |