OBJNUM caller()
This function returns the objnum of the object which defines the method which called the current method. If the current method was called by the driver zero (0) is returned instead.
atomic() | caller() | cancel() | definer() | method() | pause() | refresh() | resume() | sender() | stack() | suspend() | task_id() | tasks() | this() | tick() | ticks_left() | set_user() | user() | pass() | task_info() | call_trace() | debug_callers()