hi @MRAB i try again，it not ok. test files: 1.cpython.cpp ---c call python maintenance.py 2.maintenance.py python maintenance.py call pycapsule.cpp(dll) the code file,see attachment.
At 2018-02-21 11:18:18, "MRAB" <pyt...@mrabarnett.plus.com> wrote:
>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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maintenance.py
Description: Binary data
// cpython.cpp : ¶¨Òå¿ØÖÆ̨ӦÓóÌÐòµÄÈë¿Úµã¡£
//
#include "stdafx.h"
#include "cpython.h"
PyObject *g_pName= NULL;
PyObject *g_pModule = NULL;
int FUNCTION_CALL_MODE ReProc(void* lpContext,void* lpRequest,void* lpAnswer) {
PyObject *pDict = NULL;
PyObject *pFunc = NULL;
PyObject *pArgs = NULL;
PyObject * lpPyContext = PyCapsule_New(lpContext, "Context",NULL);
PyObject * lpPyRequest = PyCapsule_New(lpRequest, "Request", NULL);
PyObject * lpPyAnswer = PyCapsule_New(lpAnswer, "Answer", NULL);
pDict = PyModule_GetDict(g_pModule);
if (!pDict)
{
printf("Can't find dict in py_add!\n");
return -1;
}
pFunc = PyDict_GetItemString(pDict, "test");
if (!pFunc || !PyCallable_Check(pFunc))
{
printf("Can't find function!\n");
getchar();
return -1;
}
pArgs = PyTuple_New(3);
//PyTuple_SetItem(pArgs, 0, Py_BuildValue("i", 2006));
PyTuple_SetItem(pArgs, 0, lpPyContext);
PyTuple_SetItem(pArgs, 1, lpPyRequest);
PyTuple_SetItem(pArgs, 2, lpPyAnswer);
//µ÷ÓÃpythonµÄReqProcº¯Êý
PyObject* pyResult = PyObject_CallObject(pFunc, pArgs);
if (pArgs)
{
Py_DECREF(pArgs);
}
}
int FUNCTION_CALL_MODE OnInit()
{
//³õʼ»¯£¬ÔØÈëpythonµÄÀ©Õ¹Ä£¿é
Py_Initialize();
//Åжϳõʼ»¯ÊÇ·ñ³É¹¦
if (!Py_IsInitialized())
{
printf("Python init failed!\n");
return -1;
}
//PyRun_SimpleString Ϊºê£¬Ö´ÐÐÒ»¶Îpython´úÂë
//µ¼È뵱ǰ·¾¶
//C:\Users\zhaoya16975\PycharmProjects\complugin\coreplugin.py
PyRun_SimpleString("import sys");
PyRun_SimpleString("sys.path.append(\"C:\\Users\\zhaoya16975\\go\\src\\GoProxy\\plugin\\py\")");
//¼ÓÔØÃûΪpy_addµÄpython½Å±¾
g_pName = PyString_FromString("maintenance");
g_pModule = PyImport_Import(g_pName);
if (!g_pModule)
{
printf("Load coreplugin.py failed!\n");
getchar();
return -1;
}
//¹Ø±Õpythonµ÷ÓÃ
//Py_Finalize();
return 0;
}
void FUNCTION_CALL_MODE OnClose() {
}
void main() {
//¼ÓÔسõʼ»¯py²å¼þ
OnInit();
//
void* lpContext;
void* lpRequest;
void* lpAnswer;
lpContext = "abc";
lpRequest = "def";
lpAnswer = "ghi";
ReProc(lpContext, lpRequest, lpAnswer);
}
cpython.h
Description: Binary data
#include "pycapsule.h"
extern "C" {
void* FUNCTION_CALL_MODE hello(char* b) {
printf(" hello......%s\n",b);
return NULL;
}
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;
}
void* FUNCTION_CALL_MODE GetRequest(PyObject *capsule) {
printf(" GetRequest......\n");
if (!PyCapsule_IsValid(capsule, "Request")) {
printf(" the Capsule Request is no Valid\n");
return NULL;
}
return PyCapsule_GetPointer(capsule, "Request");
}
void* FUNCTION_CALL_MODE GetAnswer(PyObject *capsule) {
printf(" GetAnswer......\n");
if (!PyCapsule_IsValid(capsule, "Answer")) {
printf(" the Capsule Answer is no Valid\n");
return NULL;
}
return PyCapsule_GetPointer(capsule, "Answer");
}
PyObject * FUNCTION_CALL_MODE VoidptrToPyobject(void* lpdata, const
char* name) {
printf(" VoidptrToPyobject......\n");
return PyCapsule_New(lpdata, name, NULL);
}
void * FUNCTION_CALL_MODE PyobjectToVoidptr(PyObject * capsule, const
char* name) {
printf(" VoidptrToPyobject......\n");
void* lpdata = PyCapsule_GetPointer(capsule, name);
printf("VoidptrToPyobject :%s\n", (char*)lpdata);
return lpdata;
}
PyObject * FUNCTION_CALL_MODE VoidptrToPyobjectS() {
printf(" VoidptrToPyobject1......\n");
void * lpdata = "123";
const char* name = "zhaoya";
return PyCapsule_New(lpdata, name, NULL);
}
}
pycapsule.def
Description: Binary data
pycapsule.h
Description: Binary data
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