Hi,
I'm using python ctypes to interact with the C API of a commercial-off-
the-shelf application. I need to implement callback functions which
will be called by the application. The callbacks take as a parameter
a char** parameter for which the callback function will allocate
memory and set the value of the underlying char*. The hitch is that I
need to allocate the memory with the vendor's own memory allocation
function because the caller will free the memory with the
corresponding vendor free function. The problem is that I can't quite
work out how to set the address of the incoming POINTER(c_char_p)
parameter to the location provided by the memory allocation function.
def my_callback(pointer_c_char_p):
py_string = get_string_to_pass_back()
address = VENDOR_malloc( len(py_string)*sizeof(c_char) )
# ???? how to set pointer_c_char_p.contents to memory location
address?
# ???? would this be the correct next thing to do?
pointer_c_char_p.contents = c_char_p(py_string)
# ????
return 0
Thanks,
Scott
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