Hi I am opening a shared library which has defined the following
callback prototype:
extern void DebugMessage(int level, const char *message, ...);
My implementation in Python looks like this:
DEBUGFUNC = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.POINTER(ctypes.c_char))
def DebugMessage(lvl, msg):
print lvl, msg
return
debug_callback = DEBUGFUNC(DebugMessage)
Which gives me the following when running my python script:
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
0 <ctypes.LP_c_char object at 0x7f872d5148c0>
How can I get something useful?
If I change the print to:
print lvl, msg[0], it produces an Segfault
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