text: iofunc_close_ocb()
  Return the memory allocated for an OCB
  Synopsis:
  #include <sys/iofunc.h> int iofunc_close_ocb( resmgr_context_t* ctp, iofunc_ocb_t* ocb, iofunc_attr_t* attr );_close_ocb() function detaches the OCB specified by ocb, and releases the memory associated with it.
  This function assumes that ocb points to an iofunc_ocb_t. If you encapsulate iofunc_ocb_t in your own OCB it must be the first field of your OCB; otherwise, you can't call this function. If you provide an ocb_free() function in the mount structure then it's called at this point. This means that at least the iofunc_ocb_t portion of your OCB is no longer valid after iofunc_close_ocb() returns.
  The iofunc_close_ocb() function calls iofunc_ocb_detach() on your behalf.
  Returns:
  - EOK
  - Success.