+typedef enum UnitType UnitType;
+typedef enum UnitLoadState UnitLoadState;
+
+enum UnitType {
+ UNIT_SERVICE = 0,
+ UNIT_SOCKET,
+ UNIT_TARGET,
+ UNIT_DEVICE,
+ UNIT_MOUNT,
+ UNIT_AUTOMOUNT,
+ UNIT_SNAPSHOT,
+ UNIT_TIMER,
+ UNIT_SWAP,
+ UNIT_PATH,
+ _UNIT_TYPE_MAX,
+ _UNIT_TYPE_INVALID = -1
+};
+
+enum UnitLoadState {
+ UNIT_STUB = 0,
+ UNIT_LOADED,
+ UNIT_ERROR,
+ UNIT_MERGED,
+ UNIT_MASKED,
+ _UNIT_LOAD_STATE_MAX,
+ _UNIT_LOAD_STATE_INVALID = -1
+};
+
+extern const char* const unit_type_table[];
+const char *unit_type_to_string(UnitType i);
+UnitType unit_type_from_string(const char *s);
+
+extern const char* const unit_load_state_table[];
+const char *unit_load_state_to_string(UnitLoadState i);
+UnitLoadState unit_load_state_from_string(const char *s);
+