Re: set handle to NULL

On Wed, Aug 14, 2002 at 02:22:49AM -0400, John DeSoi wrote:
> (setf newdb (uffi:allocate-foreign-object :pointer-void))
> (setf (uffi:deref-pointer newdb) 0)

Actually, allocate-foreign-object will allocate an object and then
return a pointer to the object. So you want
(setf newdb (uffi:allocate-foreign-object :int))
(setf (uffi:deref-pointer newdb) 0)

Then pass newdb (which is a pointer) to your function.


> (uffi:def-foreign-type isc-db-handle :pointer-void)

Perhaps you need to do something like

(uffi:def-foreign-type isc-db-handle (:array :byte 4)) to setup a
4-byte storage area. I know, kinda ugly, (I didn't test this.)
(Maybe there should be a new primitive type, like :pointer, that
allocates a 4-byte array.

> (setf newdb (uffi:allocate-foreign-object (:pointer isc-db-handle))

Try,
 (setf newdb (uffi:allocate-foreign-object isc-db-handle))
Then 
  (setf (uffi:deref-pointer newdb) 0)
like above

(You can also try setting to zero using your original def-foreign-type
of :pointer-void and see if that works)

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