/* Interface to random parts in ceval.c */ #ifndef Py_CEVAL_H #define Py_CEVAL_H #ifdef __cplusplus extern "C" { #endif PyAPI_FUNC(PyObject *) PyEval_EvalCode(PyObject *, PyObject *, PyObject *); PyAPI_FUNC(PyObject *) PyEval_EvalCodeEx(PyObject *co, PyObject *globals, PyObject *locals, PyObject *const *args, int argc, PyObject *const *kwds, int kwdc, PyObject *const *defs, int defc, PyObject *kwdefs, PyObject *closure); PyAPI_FUNC(PyObject *) PyEval_GetBuiltins(void); PyAPI_FUNC(PyObject *) PyEval_GetGlobals(void); PyAPI_FUNC(PyObject *) PyEval_GetLocals(void); PyAPI_FUNC(PyFrameObject *) PyEval_GetFrame(void); PyAPI_FUNC(PyObject *) PyEval_GetFrameBuiltins(void); PyAPI_FUNC(PyObject *) PyEval_GetFrameGlobals(void); PyAPI_FUNC(PyObject *) PyEval_GetFrameLocals(void); PyAPI_FUNC(int) Py_AddPendingCall(int (*func)(void *), void *arg); PyAPI_FUNC(int) Py_MakePendingCalls(void); /* Protection against deeply nested recursive calls In Python 3.0, this protection has two levels: * normal anti-recursion protection is triggered when the recursion level exceeds the current recursion limit. It raises a RecursionError, and sets the "overflowed" flag in the thread state structure. This flag temporarily *disables* the normal protection; this allows cleanup code to potentially outgrow the recursion limit while processing the RecursionError. * "last chance" anti-recursion protection is triggered when the recursion level exceeds "current recursion limit + 50". By construction, this protection can only be triggered when the "overflowed" flag is set. It means the cleanup code has itself gone into an infinite loop, or the RecursionError has been mistakenly ignored. When this protection is triggered, the interpreter aborts with a Fatal Error. In addition, the "overflowed" flag is automatically reset when the recursion level drops below "current recursion limit - 50". This heuristic is meant to ensure that the normal anti-recursion protection doesn't get disabled too long. Please note: this scheme has its own limitations. See: http://mail.python.org/pipermail/python-dev/2008-August/082106.html for some observations. */ PyAPI_FUNC(void) Py_SetRecursionLimit(int); PyAPI_FUNC(int) Py_GetRecursionLimit(void); PyAPI_FUNC(int) Py_EnterRecursiveCall(const char *where); PyAPI_FUNC(void) Py_LeaveRecursiveCall(void); PyAPI_FUNC(const char *) PyEval_GetFuncName(PyObject *); PyAPI_FUNC(const char *) PyEval_GetFuncDesc(PyObject *); PyAPI_FUNC(PyObject *) PyEval_EvalFrame(PyFrameObject *); PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(PyFrameObject *f, int exc); /* Interface for threads. A module that plans to do a blocking system call (or something else that lasts a long time and doesn't touch Python data) can allow other threads to run as follows: ...preparations here... Py_BEGIN_ALLOW_THREADS ...blocking system call here... Py_END_ALLOW_THREADS ...interpret result here... The Py_BEGIN_ALLOW_THREADS/Py_END_ALLOW_THREADS pair expands to a {}-surrounded block. To leave the block in the middle (e.g., with return), you must insert a line containing Py_BLOCK_THREADS before the return, e.g. if (...premature_exit...) { Py_BLOCK_THREADS PyErr_SetFromErrno(PyExc_OSError); return NULL; } An alternative is: Py_BLOCK_THREADS if (...premature_exit...) { PyErr_SetFromErrno(PyExc_OSError); return NULL; } Py_UNBLOCK_THREADS For convenience, that the value of 'errno' is restored across Py_END_ALLOW_THREADS and Py_BLOCK_THREADS. WARNING: NEVER NEST CALLS TO Py_BEGIN_ALLOW_THREADS AND Py_END_ALLOW_THREADS!!! Note that not yet all candidates have been converted to use this mechanism! */ PyAPI_FUNC(PyThreadState *) PyEval_SaveThread(void); PyAPI_FUNC(void) PyEval_RestoreThread(PyThreadState *); Py_DEPRECATED(3.9) PyAPI_FUNC(void) PyEval_InitThreads(void); PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate); PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate); #define Py_BEGIN_ALLOW_THREADS … #define Py_BLOCK_THREADS … #define Py_UNBLOCK_THREADS … #define Py_END_ALLOW_THREADS … /* Masks and values used by FORMAT_VALUE opcode. */ #define FVC_MASK … #define FVC_NONE … #define FVC_STR … #define FVC_REPR … #define FVC_ASCII … #define FVS_MASK … #define FVS_HAVE_SPEC … /* Special methods used by LOAD_SPECIAL */ #define SPECIAL___ENTER__ … #define SPECIAL___EXIT__ … #define SPECIAL___AENTER__ … #define SPECIAL___AEXIT__ … #define SPECIAL_MAX … #ifndef Py_LIMITED_API #define Py_CPYTHON_CEVAL_H # include "cpython/ceval.h" # undef Py_CPYTHON_CEVAL_H #endif #ifdef __cplusplus } #endif #endif /* !Py_CEVAL_H */
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