src/Pure/ML-Systems/thread_physical_processors.ML

+(*  Title:      Pure/ML-Systems/thread_physical_processors.ML
+    Author:     Makarius
+
+Emulation of structure Thread in Poly/ML 5.5.2 (SVN 1890).
+*)
+
+structure Thread =
+struct
+  open Thread;
+
+  fun numPhysicalProcessors () : int option = NONE;
+end;