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diff --git a/x0vncserver/CPUMonitor.h b/x0vncserver/CPUMonitor.h
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+/* Copyright (C) 2005 Constantin Kaplinsky.  All Rights Reserved.
+ *    
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+//
+// CPUMonitor.h
+//
+
+#ifndef __CPUMONITOR_H__
+#define __CPUMONITOR_H__
+
+#include <sys/time.h>
+#include <time.h>
+
+class CPUMonitor {
+
+public:
+
+  CPUMonitor(int optimalLevel = 50, int updatePeriod = 1000);
+
+  //
+  // Optimal level is the CPU utilization level to maintain, in
+  // percents.
+  //
+  void setLevel(int optimalLevel);
+
+  //
+  // Update period is the minimum time in milliseconds that has to
+  // pass after update() or check() call, before next check() call
+  // will return meaningful value.
+  //
+  void setPeriod(int updatePeriod);
+
+  //
+  // Save current time and CPU clock, to use in the next check() call.
+  //
+  void update();
+
+  //
+  // This method calculates recent CPU utilization and returns a
+  // percentage factor which would convert current CPU usage into the
+  // optimal value. For example, if the optimal level was set to 40%
+  // and the real value was 50%, the function will return 80, because
+  // 50 * 80% == 40.
+  //
+  // If the CPU utilization cannot be measured, this function returns
+  // 100. This may be the case on the first call to check(), or if the
+  // time period between two successive check() calls was too small.
+  //
+  int check();
+
+protected:
+
+  static void getClock(struct timeval *tv, clock_t *clk);
+
+  int m_optimalLevel;
+  int m_updatePeriod;
+  struct timeval m_savedTime;
+  clock_t m_savedClock;
+
+};
+
+#endif // __CPUMONITOR_H__