Import Geant4 0.0.0 source tree

2016-06-01 15:25:35 +02:00
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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4Timer.hh,v 2.2 1998/07/17 08:51:44 gunter Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// 
+// ----------------------------------------------------------------------
+// class G4Timer
+//
+// Class for timer objects, able to measure elasped user/system process
+// time.
+//
+// Note: Uses <sys/times.h> & <unistd.h> - POSIX.1 defined
+//
+// Member functions:
+//
+// G4Timer()
+//   Construct a timer object
+// Start()
+//   Start timing
+// Stop()
+//   Stop timing
+// G4bool IsValid()
+//   Return true if have a valid time (ie start() and stop() called)
+// G4double GetRealElapsed()
+//   Return the elapsed real time between last calling start() and stop()
+// G4double GetSystemElapsed()
+//   Return the elapsed system time between last calling start() and stop()
+// G4double GetUserElapsed()
+//   Return the elapsed user time between last calling start() and stop()
+//
+// Operators:
+//
+// ostream& operator << (ostream& os, const G4Timer& t);
+//   Print the elapsed real,system and usertimes on os. Prints **s for times
+//   if !IsValid
+//
+// Member data:
+//
+// G4bool fValidTimes
+//   True after start and stop have both been called more than once and
+//   an equal number of times
+// clock_t fStartRealTime,fEndRealTime
+//   Real times (arbitrary time 0)
+// tms fStartTimes,fEndTimes
+//   Timing structures (see times(2)) for start and end times
+//
+// History:
+// 23.08.96 P.Kent Updated to also computed real elapsed time
+// 21.08.95 P.Kent
+// 29.04.97 G.Cosmo Added timings for Windows/NT
+
+#ifndef G4TIMER_HH
+#define G4TIMER_HH
+
+#ifndef WIN32
+#  include <unistd.h>
+#  include <sys/times.h>
+#else
+#  include <time.h>
+#  define _SC_CLK_TCK    1
+
+   extern "C" {
+          int sysconf(int);
+   };
+
+   // Structure returned by times()
+  
+   struct tms {
+      clock_t tms_utime;           /* user time */
+      clock_t tms_stime;           /* system time */
+      clock_t tms_cutime;          /* user time, children */
+      clock_t tms_cstime;          /* system time, children */
+   };
+
+   extern "C" {
+      extern clock_t times(struct tms *);
+   };
+#endif  /* WIN32 */
+
+#include "globals.hh"
+
+class ostream;
+
+class G4Timer
+{
+public:
+    G4Timer() : fValidTimes(false) {;}
+
+    inline void Start();
+    inline void Stop();
+    inline G4bool IsValid() const;
+    G4double GetRealElapsed() const;
+    G4double GetSystemElapsed() const;
+    G4double GetUserElapsed() const;
+private:
+    G4bool fValidTimes;
+    clock_t fStartRealTime,fEndRealTime;
+    tms fStartTimes,fEndTimes;
+};
+
+ostream& operator << (ostream& os, const G4Timer& t);
+
+// Inline functions:
+
+inline void G4Timer::Start()
+{
+    fValidTimes=false;
+    fStartRealTime=times(&fStartTimes);
+}
+
+inline void G4Timer::Stop()
+{
+    fEndRealTime=times(&fEndTimes);
+    fValidTimes=true;
+}
+
+inline G4bool G4Timer::IsValid() const
+{
+    return fValidTimes;
+}
+
+#endif