Index: trunk/Ohana/src/opihi/lib.shell/MacroOps.c
===================================================================
--- trunk/Ohana/src/opihi/lib.shell/MacroOps.c	(revision 16442)
+++ trunk/Ohana/src/opihi/lib.shell/MacroOps.c	(revision 16888)
@@ -1,3 +1,8 @@
 # include "opihi.h"
+
+// the macro table is only modified by macro_create: if thread protection is needed, it
+// should be added there.  it may not be needed if programs only call macro_create in a
+// single thread.  pantasks_server only calls macro_create in the 'input' thread, so it is
+// safe.
 
 static char dot[] = ".";