#ifndef Py_CEVAL_H #define Py_CEVAL_H #ifdef __cplusplus extern "C" { #endif /* Interface to random parts in ceval.c */ PyAPI_FUNC(PyObject *) PyEval_CallObjectWithKeywords( PyObject *, PyObject *, PyObject *); /* Inline this */ #define PyEval_CallObject(func,arg) \ PyEval_CallObjectWithKeywords(func, arg, (PyObject *)NULL) PyAPI_FUNC(PyObject *) PyEval_CallFunction(PyObject *obj, const char *format, ...); PyAPI_FUNC(PyObject *) PyEval_CallMethod(PyObject *obj, const char *methodname, const char *format, ...); PyAPI_FUNC(void) PyEval_SetProfile(Py_tracefunc, PyObject *); PyAPI_FUNC(void) PyEval_SetTrace(Py_tracefunc, PyObject *); struct _frame; /* Avoid including frameobject.h */ PyAPI_FUNC(PyObject *) PyEval_GetBuiltins(void); PyAPI_FUNC(PyObject *) PyEval_GetGlobals(void); PyAPI_FUNC(PyObject *) PyEval_GetLocals(void); PyAPI_FUNC(struct _frame *) PyEval_GetFrame(void); PyAPI_FUNC(int) PyEval_GetRestricted(void); /* Look at the current frame's (if any) code's co_flags, and turn on the corresponding compiler flags in cf->cf_flags. Return 1 if any flag was set, else return 0. */ PyAPI_FUNC(int) PyEval_MergeCompilerFlags(PyCompilerFlags *cf); PyAPI_FUNC(int) Py_FlushLine(void); PyAPI_FUNC(int) Py_AddPendingCall(int (*func)(void *), void *arg); PyAPI_FUNC(int) Py_MakePendingCalls(void); /* Protection against deeply nested recursive calls */ PyAPI_FUNC(void) Py_SetRecursionLimit(int); PyAPI_FUNC(int) Py_GetRecursionLimit(void); #define Py_EnterRecursiveCall(where) \ (_Py_MakeRecCheck(PyThreadState_GET()->recursion_depth) && \ _Py_CheckRecursiveCall(where)) #define Py_LeaveRecursiveCall() \ (--PyThreadState_GET()->recursion_depth) PyAPI_FUNC(int) _Py_CheckRecursiveCall(char *where); PyAPI_DATA(int) _Py_CheckRecursionLimit; #ifdef USE_STACKCHECK # define _Py_MakeRecCheck(x) (++(x) > --_Py_CheckRecursionLimit) #else # define _Py_MakeRecCheck(x) (++(x) > _Py_CheckRecursionLimit) #endif PyAPI_FUNC(const char *) PyEval_GetFuncName(PyObject *); PyAPI_FUNC(const char *) PyEval_GetFuncDesc(PyObject *); PyAPI_FUNC(PyObject *) PyEval_GetCallStats(PyObject *); PyAPI_FUNC(PyObject *) PyEval_EvalFrame(struct _frame *); PyAPI_FUNC(PyObject *) PyEval_EvalFrameEx(struct _frame *f, int exc); /* this used to be handled on a per-thread basis - now just two globals */ PyAPI_DATA(volatile int) _Py_Ticker; PyAPI_DATA(int) _Py_CheckInterval; /* 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_IOError); return NULL; } An alternative is: Py_BLOCK_THREADS if (...premature_exit...) { PyErr_SetFromErrno(PyExc_IOError); 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!!! The function PyEval_InitThreads() should be called only from initthread() in "threadmodule.c". 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 *); #ifdef WITH_THREAD PyAPI_FUNC(int) PyEval_ThreadsInitialized(void); PyAPI_FUNC(void) PyEval_InitThreads(void); PyAPI_FUNC(void) PyEval_AcquireLock(void); PyAPI_FUNC(void) PyEval_ReleaseLock(void); PyAPI_FUNC(void) PyEval_AcquireThread(PyThreadState *tstate); PyAPI_FUNC(void) PyEval_ReleaseThread(PyThreadState *tstate); PyAPI_FUNC(void) PyEval_ReInitThreads(void); #define Py_BEGIN_ALLOW_THREADS { \ PyThreadState *_save; \ _save = PyEval_SaveThread(); #define Py_BLOCK_THREADS PyEval_RestoreThread(_save); #define Py_UNBLOCK_THREADS _save = PyEval_SaveThread(); #define Py_END_ALLOW_THREADS PyEval_RestoreThread(_save); \ } #else /* !WITH_THREAD */ #define Py_BEGIN_ALLOW_THREADS { #define Py_BLOCK_THREADS #define Py_UNBLOCK_THREADS #define Py_END_ALLOW_THREADS } #endif /* !WITH_THREAD */ PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, Py_ssize_t *); #ifdef __cplusplus } #endif #endif /* !Py_CEVAL_H */

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