C扩展库中回调Python函数，扩展回调python函数,[C/C++]代码//

C扩展库中回调Python函数，扩展回调python函数,[C/C++]代码//

[C/C++]代码

// c 程序 段static PyObject *gc_before_extract = NULL;/// 设置回调static PyObject *SetBeforeCallbackFn(PyObject *dummy, PyObject *args){PyObject *temp = NULL;if (PyArg_ParseTuple(args, "O:set_callback", &temp)) {   if (!PyCallable_Check(temp)) {    PyErr_SetString(PyExc_TypeError, "parameter must be callable");   }   Py_XINCREF(temp);         /* Add a reference to new callback */   Py_XDECREF(gc_before_extract); /* Dispose of previous callback */   gc_before_extract = temp;       /* Remember new callback */}return Py_BuildValue("l", (gc_before_extract == NULL) ? 0 : 1);}/// 调用上面函数设置的python脚本函数int BeforeExt(char *pBeforeExtract){PyObject* pArgs = NULL;PyObject* pRetVal = NULL;int    nRetVal = 0;pArgs = Py_BuildValue("(s)", pFileName);pRetVal = PyEval_CallObject(gc_before_extract, pArgs);if (pRetVal){   fprintf(stderr, "PyEval_CallObject : ok \r\n");   nRetVal = PyInt_AsLong(pRetVal);   fprintf(stderr, "PyEval_CallObject : return : %d \r\n", nRetVal);}Py_DECREF(pArgs);Py_DECREF(pRetVal);return nRetVal;}/// 测试函数static PyObject* my_test_callback(PyObject *self, PyObject *args) { PyObject * arglist; PyObject * result = NULL;BeforeExt("good");result = PyEval_CallObject(gc_before_extract, args); if (result){   Py_DECREF(result); }Py_INCREF(Py_None); return Py_None; }

[Python]代码

/////// python 脚本from pyArchive import *from ctypes import *# 回调函数必须有一个int型的返回值def set_callback_fn(abc) :    print "t_callback_fn say : {0}".format(abc)    return 11CMPFUNC = CFUNCTYPE(c_int, c_char_p) _callback = CMPFUNC(set_callback_fn)    if SetBeforeCallbackFn(_callback):        print "set call back ok"        my_test_callback("script call : good luck")    else :        print "set call back fail"