--- a/AbstractOperatingSystem.st	Fri Aug 04 20:10:56 2017 +0200
+++ b/AbstractOperatingSystem.st	Mon Aug 07 11:56:45 2017 +0200
@@ -1,3 +1,5 @@
+"{ Encoding: utf8 }"
+
 "
  COPYRIGHT (c) 1988 by Claus Gittinger
 	      All Rights Reserved
@@ -1137,6 +1139,7 @@
     "Created: / 12.11.1998 / 14:39:20 / cg"
 ! !
 
+
 !AbstractOperatingSystem class methodsFor:'executing OS commands-public'!
 
 executeCommand:aCommandString
@@ -6789,6 +6792,23 @@
     self subclassResponsibility
 !
 
+getMonotonicNanosecondTime
+    "This returns the nanosecond timers value - if available.
+     On some machines, times with this precision may not be available,
+     on those, the returned value may be rounded towards some internal
+     clock resolution value.
+
+     If supported by the system, it uses a clock that cannot be set and represents
+     monotonic time since some unspecified starting point.  This clock is not affected by
+     discontinuous  jumps  in  the system time 
+     (e.g., if the system administrator manually changes the clock), but is affected by
+     the incremental adjustments performed by adjtime(3) and NTP."
+
+    ^ self subclassResponsibility
+
+    "Modified (comment): / 07-08-2017 / 11:56:02 / stefan"
+!
+
 getOSTime
     "This returns the OS time.
      The base of the returned value is not consistent across
@@ -6804,6 +6824,20 @@
     self subclassResponsibility
 !
 
+getRealNanosecondTime
+    "This returns the microsecond timers value - if available.
+     On some machines, times with this precision may not be available,
+     on those, the returned value may be rounded towards some internal
+     clock resolution value.
+     Note, that the timers value is not monotonic,
+     it may jump forward or backward if the sytsems time is changed by e.g. NTP
+     or the system administrator!!"
+
+    ^ self subclassResponsibility
+
+    "Modified (comment): / 07-08-2017 / 11:55:46 / stefan"
+!
+
 maximumMillisecondTimeDelta
     "this returns the maximum delta supported by millisecondCounter
      based methods. The returned value is half the value at which the