api changes

src/include/osiMutexNOOP.h

@@ -3,6 +3,14 @@
 // osiMutex - OS independent mutex 
 // (NOOP on single threaded OS)
 //
+// NOTE:
+// I have made lock/unlock const because this allows
+// a list to be run in a const member function on a 
+// multi-threaded os (since paired lock/unlock
+// requests really do not modify the internal 
+// state of the object and neither does
+// running the list if we dont modify the list).
+//
 class osiMutex {
 public:
         //
@@ -10,8 +18,8 @@ public:
         // (since g++ does not have exceptions)
         //
 	int init() {return 0;}
-        void osiLock() {}
-        void osiUnlock() {}
+        void osiLock() const {}
+        void osiUnlock() const {}
 	void show (unsigned) const {}
 private:
 };