Default (mostly dummy) implementation of thread structures.
formerly in multithreading.ML;
create mutexes / condition variables without failure;
--- a/src/Pure/ML-Systems/thread_dummy.ML Sun Sep 07 17:48:49 2008 +0200
+++ b/src/Pure/ML-Systems/thread_dummy.ML Sun Sep 07 17:48:50 2008 +0200
@@ -79,4 +79,3 @@
end;
end;
end;
-