Added new defines OBJECTS_ID_NONE

and RTEMS_ID_NONE.  No object can have this ID.

cpukit/rtems/include/rtems/rtems/types.h

@@ -50,8 +50,11 @@ typedef double_precision rtems_double;    /* double precision float */
 typedef boolean          rtems_boolean;
 
 typedef uint32_t         rtems_name;
+
 typedef Objects_Id       rtems_id;
 
+#define RTEMS_ID_NONE OBJECTS_ID_NONE
+
 typedef Context_Control            rtems_context;
 typedef Context_Control_fp         rtems_context_fp;
 typedef CPU_Interrupt_frame        rtems_interrupt_frame;

cpukit/score/include/rtems/score/object.h

@@ -387,6 +387,11 @@ SCORE_EXTERN uint16_t    _Objects_Maximum_nodes;
 SCORE_EXTERN Objects_Information
     **_Objects_Information_table[OBJECTS_APIS_LAST + 1];
 
+/**
+ *  No object can have this ID.
+ */
+#define OBJECTS_ID_NONE 0
+
 /**
  *  The following defines the constant which may be used
  *  with _Objects_Get to manipulate the calling task.