Yes, i double defined one of the terms when copying it. This now works by value and by reference. Thanks alot, Bryan
"Thomas Heller" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > mclaugb schrieb: >> I have a simple function >> >> void adder(double a, double b, double *c){ >> *c = a+b; >> } >> >> i have created a shared dll -- "small_dll4.dll" of it using visual >> studio. >> >> now i wish to call it from python. >> to do so, i have done the following: >> >> libx = cdll("small_dll4.dll", RTLD_GLOBAL) >> libx.adder.argtypes = [c_double, c_double, POINTER(c_double)] >> libx.adder.restype = None >> size=c_double() >> zz=libd.adder(3.342, 4, byref(size)) >> >> and the result is an access violation! >> >> File "<console>", line 0, in __main__ >> WindowsError: exception: access violation reading 0x7EF9DB23 >> >> I cant figure out what is causing this. > > That should work (and works for me, of course). > Do you have a typo in the above code? libd instead of libx? > > Thomas > -- http://mail.python.org/mailman/listinfo/python-list
