239 lines
8.5 KiB
C
239 lines
8.5 KiB
C
#ifndef Py_CEVAL_H
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#define Py_CEVAL_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Interface to random parts in ceval.c */
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/* PyEval_CallObjectWithKeywords(), PyEval_CallObject(), PyEval_CallFunction
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* and PyEval_CallMethod are kept for backward compatibility: PyObject_Call(),
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* PyObject_CallFunction() and PyObject_CallMethod() are recommended to call
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* a callable object.
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*/
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PyAPI_FUNC(PyObject *) PyEval_CallObjectWithKeywords(
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PyObject *callable,
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PyObject *args,
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PyObject *kwargs);
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/* Inline this */
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#define PyEval_CallObject(callable, arg) \
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PyEval_CallObjectWithKeywords(callable, arg, (PyObject *)NULL)
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PyAPI_FUNC(PyObject *) PyEval_CallFunction(PyObject *callable,
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const char *format, ...);
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PyAPI_FUNC(PyObject *) PyEval_CallMethod(PyObject *obj,
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const char *name,
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const char *format, ...);
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(void) PyEval_SetProfile(Py_tracefunc, PyObject *);
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PyAPI_FUNC(void) PyEval_SetTrace(Py_tracefunc, PyObject *);
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PyAPI_FUNC(void) _PyEval_SetCoroutineOriginTrackingDepth(int new_depth);
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PyAPI_FUNC(int) _PyEval_GetCoroutineOriginTrackingDepth(void);
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PyAPI_FUNC(void) _PyEval_SetCoroutineWrapper(PyObject *);
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PyAPI_FUNC(PyObject *) _PyEval_GetCoroutineWrapper(void);
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PyAPI_FUNC(void) _PyEval_SetAsyncGenFirstiter(PyObject *);
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PyAPI_FUNC(PyObject *) _PyEval_GetAsyncGenFirstiter(void);
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PyAPI_FUNC(void) _PyEval_SetAsyncGenFinalizer(PyObject *);
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PyAPI_FUNC(PyObject *) _PyEval_GetAsyncGenFinalizer(void);
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#endif
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struct _frame; /* Avoid including frameobject.h */
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PyAPI_FUNC(PyObject *) PyEval_GetBuiltins(void);
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PyAPI_FUNC(PyObject *) PyEval_GetGlobals(void);
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PyAPI_FUNC(PyObject *) PyEval_GetLocals(void);
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PyAPI_FUNC(struct _frame *) PyEval_GetFrame(void);
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#ifndef Py_LIMITED_API
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/* Helper to look up a builtin object */
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PyAPI_FUNC(PyObject *) _PyEval_GetBuiltinId(_Py_Identifier *);
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/* Look at the current frame's (if any) code's co_flags, and turn on
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the corresponding compiler flags in cf->cf_flags. Return 1 if any
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flag was set, else return 0. */
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PyAPI_FUNC(int) PyEval_MergeCompilerFlags(PyCompilerFlags *cf);
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#endif
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PyAPI_FUNC(int) Py_AddPendingCall(int (*func)(void *), void *arg);
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PyAPI_FUNC(void) _PyEval_SignalReceived(void);
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PyAPI_FUNC(int) Py_MakePendingCalls(void);
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/* Protection against deeply nested recursive calls
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In Python 3.0, this protection has two levels:
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* normal anti-recursion protection is triggered when the recursion level
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exceeds the current recursion limit. It raises a RecursionError, and sets
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the "overflowed" flag in the thread state structure. This flag
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temporarily *disables* the normal protection; this allows cleanup code
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to potentially outgrow the recursion limit while processing the
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RecursionError.
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* "last chance" anti-recursion protection is triggered when the recursion
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level exceeds "current recursion limit + 50". By construction, this
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protection can only be triggered when the "overflowed" flag is set. It
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means the cleanup code has itself gone into an infinite loop, or the
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RecursionError has been mistakingly ignored. When this protection is
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triggered, the interpreter aborts with a Fatal Error.
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In addition, the "overflowed" flag is automatically reset when the
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recursion level drops below "current recursion limit - 50". This heuristic
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is meant to ensure that the normal anti-recursion protection doesn't get
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disabled too long.
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Please note: this scheme has its own limitations. See:
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http://mail.python.org/pipermail/python-dev/2008-August/082106.html
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for some observations.
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*/
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PyAPI_FUNC(void) Py_SetRecursionLimit(int);
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PyAPI_FUNC(int) Py_GetRecursionLimit(void);
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#define Py_EnterRecursiveCall(where) \
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(_Py_MakeRecCheck(PyThreadState_GET()->recursion_depth) && \
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_Py_CheckRecursiveCall(where))
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#define Py_LeaveRecursiveCall() \
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do{ if(_Py_MakeEndRecCheck(PyThreadState_GET()->recursion_depth)) \
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PyThreadState_GET()->overflowed = 0; \
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} while(0)
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PyAPI_FUNC(int) _Py_CheckRecursiveCall(const char *where);
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/* Due to the macros in which it's used, _Py_CheckRecursionLimit is in
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the stable ABI. It should be removed therefrom when possible.
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*/
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PyAPI_DATA(int) _Py_CheckRecursionLimit;
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#ifdef USE_STACKCHECK
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/* With USE_STACKCHECK, trigger stack checks in _Py_CheckRecursiveCall()
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on every 64th call to Py_EnterRecursiveCall.
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*/
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# define _Py_MakeRecCheck(x) \
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(++(x) > _Py_CheckRecursionLimit || \
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++(PyThreadState_GET()->stackcheck_counter) > 64)
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#else
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# define _Py_MakeRecCheck(x) (++(x) > _Py_CheckRecursionLimit)
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#endif
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/* Compute the "lower-water mark" for a recursion limit. When
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* Py_LeaveRecursiveCall() is called with a recursion depth below this mark,
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* the overflowed flag is reset to 0. */
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#define _Py_RecursionLimitLowerWaterMark(limit) \
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(((limit) > 200) \
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? ((limit) - 50) \
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: (3 * ((limit) >> 2)))
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#define _Py_MakeEndRecCheck(x) \
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(--(x) < _Py_RecursionLimitLowerWaterMark(_Py_CheckRecursionLimit))
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#define Py_ALLOW_RECURSION \
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do { unsigned char _old = PyThreadState_GET()->recursion_critical;\
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PyThreadState_GET()->recursion_critical = 1;
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#define Py_END_ALLOW_RECURSION \
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PyThreadState_GET()->recursion_critical = _old; \
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} while(0);
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PyAPI_FUNC(const char *) PyEval_GetFuncName(PyObject *);
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PyAPI_FUNC(const char *) PyEval_GetFuncDesc(PyObject *);
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PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *);
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PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(struct _frame *f, int exc);
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(PyObject *) _PyEval_EvalFrameDefault(struct _frame *f, int exc);
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#endif
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/* Interface for threads.
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A module that plans to do a blocking system call (or something else
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that lasts a long time and doesn't touch Python data) can allow other
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threads to run as follows:
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...preparations here...
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Py_BEGIN_ALLOW_THREADS
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...blocking system call here...
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Py_END_ALLOW_THREADS
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...interpret result here...
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The Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS pair expands to a
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{}-surrounded block.
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To leave the block in the middle (e.g., with return), you must insert
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a line containing Py_BLOCK_THREADS before the return, e.g.
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if (...premature_exit...) {
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Py_BLOCK_THREADS
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PyErr_SetFromErrno(PyExc_OSError);
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return NULL;
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}
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An alternative is:
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Py_BLOCK_THREADS
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if (...premature_exit...) {
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PyErr_SetFromErrno(PyExc_OSError);
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return NULL;
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}
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Py_UNBLOCK_THREADS
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For convenience, that the value of 'errno' is restored across
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Py_END_ALLOW_THREADS and Py_BLOCK_THREADS.
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WARNING: NEVER NEST CALLS TO Py_BEGIN_ALLOW_THREADS AND
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Py_END_ALLOW_THREADS!!!
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The function PyEval_InitThreads() should be called only from
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init_thread() in "_threadmodule.c".
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Note that not yet all candidates have been converted to use this
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mechanism!
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*/
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PyAPI_FUNC(PyThreadState *) PyEval_SaveThread(void);
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PyAPI_FUNC(void) PyEval_RestoreThread(PyThreadState *);
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PyAPI_FUNC(int) PyEval_ThreadsInitialized(void);
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PyAPI_FUNC(void) PyEval_InitThreads(void);
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(void) _PyEval_FiniThreads(void);
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#endif /* !Py_LIMITED_API */
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PyAPI_FUNC(void) PyEval_AcquireLock(void) Py_DEPRECATED(3.2);
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PyAPI_FUNC(void) PyEval_ReleaseLock(void) /* Py_DEPRECATED(3.2) */;
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PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate);
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PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate);
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PyAPI_FUNC(void) PyEval_ReInitThreads(void);
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(void) _PyEval_SetSwitchInterval(unsigned long microseconds);
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PyAPI_FUNC(unsigned long) _PyEval_GetSwitchInterval(void);
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#endif
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(Py_ssize_t) _PyEval_RequestCodeExtraIndex(freefunc);
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#endif
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#define Py_BEGIN_ALLOW_THREADS { \
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PyThreadState *_save; \
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_save = PyEval_SaveThread();
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#define Py_BLOCK_THREADS PyEval_RestoreThread(_save);
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#define Py_UNBLOCK_THREADS _save = PyEval_SaveThread();
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#define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \
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}
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#ifndef Py_LIMITED_API
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PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, Py_ssize_t *);
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PyAPI_FUNC(int) _PyEval_SliceIndexNotNone(PyObject *, Py_ssize_t *);
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PyAPI_FUNC(void) _PyEval_SignalAsyncExc(void);
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#endif
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/* Masks and values used by FORMAT_VALUE opcode. */
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#define FVC_MASK 0x3
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#define FVC_NONE 0x0
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#define FVC_STR 0x1
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#define FVC_REPR 0x2
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#define FVC_ASCII 0x3
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#define FVS_MASK 0x4
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#define FVS_HAVE_SPEC 0x4
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_CEVAL_H */
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