#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, ...);

#ifndef Py_LIMITED_API

PyAPI_FUNC(void) PyEval_SetProfile(Py_tracefunc, PyObject *);

PyAPI_FUNC(void) PyEval_SetTrace(Py_tracefunc, PyObject *);

PyAPI_FUNC(void) _PyEval_SetCoroutineWrapper(PyObject *);

PyAPI_FUNC(PyObject *) _PyEval_GetCoroutineWrapper(void);

#endif

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);

/* 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. */

#ifndef Py_LIMITED_API

PyAPI_FUNC(int) PyEval_MergeCompilerFlags(PyCompilerFlags *cf);

#endif

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 RuntimeError, 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

RuntimeError.

* "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

RuntimeError has been mistakingly 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);

#define Py_EnterRecursiveCall(where) \

(_Py_MakeRecCheck(PyThreadState_GET()->recursion_depth) && \

_Py_CheckRecursiveCall(where))

#define Py_LeaveRecursiveCall() \

do{ if(_Py_MakeEndRecCheck(PyThreadState_GET()->recursion_depth)) \

PyThreadState_GET()->overflowed = 0; \

} while(0)

PyAPI_FUNC(int) _Py_CheckRecursiveCall(char *where);

PyAPI_DATA(int) _Py_CheckRecursionLimit;

#ifdef USE_STACKCHECK

/* With USE_STACKCHECK, we artificially decrement the recursion limit in order

to trigger regular stack checks in _Py_CheckRecursiveCall(), except if

the "overflowed" flag is set, in which case we need the true value

of _Py_CheckRecursionLimit for _Py_MakeEndRecCheck() to function properly.

*/

# define _Py_MakeRecCheck(x) \

(++(x) > (_Py_CheckRecursionLimit += PyThreadState_GET()->overflowed - 1))

#else

# define _Py_MakeRecCheck(x) (++(x) > _Py_CheckRecursionLimit)

#endif

#define _Py_MakeEndRecCheck(x) \

(--(x) < ((_Py_CheckRecursionLimit > 100) \

? (_Py_CheckRecursionLimit - 50) \

: (3 * (_Py_CheckRecursionLimit >> 2))))

#define Py_ALLOW_RECURSION \

do { unsigned char _old = PyThreadState_GET()->recursion_critical;\

PyThreadState_GET()->recursion_critical = 1;

#define Py_END_ALLOW_RECURSION \

PyThreadState_GET()->recursion_critical = _old; \

} while(0);

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);

/* 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

init_thread() 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_FiniThreads(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);

#ifndef Py_LIMITED_API

PyAPI_FUNC(void) _PyEval_SetSwitchInterval(unsigned long microseconds);

PyAPI_FUNC(unsigned long) _PyEval_GetSwitchInterval(void);

#endif

#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 */

#ifndef Py_LIMITED_API

PyAPI_FUNC(int) _PyEval_SliceIndex(PyObject *, Py_ssize_t *);

PyAPI_FUNC(void) _PyEval_SignalAsyncExc(void);

#endif

#ifdef __cplusplus

}

#endif

#endif /* !Py_CEVAL_H */