Instrumented Nasal GC

simgear/timing/timestamp.cxx

@@ -337,3 +337,21 @@ int SGTimeStamp::elapsedMSec() const
     
     return static_cast<int>((now - *this).toMSecs());
 }
+
+int SGTimeStamp::elapsedUSec() const
+{
+    SGTimeStamp now;
+    now.stamp();
+
+    return static_cast<int>((now - *this).toUSecs());
+}
+extern "C" {
+    SGTimeStamp global_timestamp;
+    void global_stamp() {
+        global_timestamp.stamp();
+    }
+    extern int global_elapsedUSec()
+    {
+        return global_timestamp.elapsedUSec();
+    }
+    }

simgear/timing/timestamp.hxx

@@ -221,9 +221,13 @@ public:
     { return sleepFor(fromMSec(msec)); }
 
     /**
-     * elapsed time since the stamp was taken, in msec
-     */
+    * elapsed time since the stamp was taken, in msec
+    */
     int elapsedMSec() const;
+    /**
+    * elapsed time since the stamp was taken, in usec
+    */
+    int elapsedUSec() const;
 private:
     SGTimeStamp(sec_type sec, nsec_type nsec)
     { setTime(sec, nsec); }