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从调用DLL函数,当我在DLL函数,并尝试调用它在Python 3函数原型为:错误的返回类型在Python
__declspec(dllexport) char* getmetadata(char* szFile, size_t* metadata_size);
Python代码是:
...
libm = ctypes.CDLL("libm.dll")
fc = libm.getmetadata
fc.restype = ctypes.c_char_p
fc.argtypes = [ctypes.c_char_p, ctypes.POINTER(ctypes.c_size_t)]
size = ctypes.c_size_t(0)
buffer = fc(bytes(path, "utf8"), ctypes.byref(size))
类型的缓冲区是字节。为什么它不是c_char_p?