On 2018-02-21 02:28, 赵亚 wrote:
This "python-dev" list is for development of the Python language itself.
I think that this message should instead have been sent to "python-list".
i have question:call,c-->python-->c.
1.the c pointer void* abc="123" by pycapsule in the c code.
......
void* lpContext = "abc";
PyObject * lpPyContext = PyCapsule_New(lpContext, "Context",NULL);
......
Is this C code calling the function 'test' in the Python code?
If yes, are you sure that lpPyContext should be in pArgs at index 1 and
not at index 0?
The function 'test' expects argument 0 => lpContext, argument 1 =>
lpRequest, argument 2 => lpAnswer.
PyTuple_SetItem(pArgs, 1, lpPyContext);
PyObject* pyResult = PyObject_CallObject(pFunc, pArgs);
2.c call python:
in the python code:
import ctypes
pycapsule = ctypes.windll.LoadLibrary("C:\Users\zhaoya16975\Documents\Visual Studio
2017\Projects\cpython\Release\pycapsule.dll")
def test( lpContext,lpRequest,lpAnswer):
print lpContext
pycapsule.hello()
pycapsule.GetContext(lpContext)
.........
the lpContest is "<capsule object "Context" at 0x02747e00>"
but,i can't lpContext in the pycapsule.GetContest:
the capsule is null poniter,the GetContext no execute!!
void* FUNCTION_CALL_MODE GetContext(PyObject *capsule) {
printf(" GetContext......\n");
//if (!PyCapsule_IsValid((PyObject *)capsule, "Context")) {
// printf(" the Capsule Context is no Valid\n");
// return NULL;
//}
//return PyCapsule_GetPointer((PyObject *)capsule, "Context");
return NULL;
}
FUNCTION_CALL_MODE is __stdcall i think no problem.because, if GetContext(PyObject
*capsule) -->GetContext() is ok. PyObject *capsule from python to c unknown
error occurred.
i hope c call python pass void* ,and python call c pass void* ,but the capsule
call no success?
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