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timer.hpp
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3  * Main authors:
4  * Mikael Lagerkvist <lagerkvist@gecode.org>
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7  * Mikael Lagerkvist, 2009
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10  * $Date: 2010-07-14 17:46:18 +0200 (Wed, 14 Jul 2010) $ by $Author: schulte $
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37 
38 #ifdef GECODE_USE_GETTIMEOFDAY
39 #include <sys/time.h>
40 #endif
41 
42 #ifdef GECODE_USE_CLOCK
43 #include <ctime>
44 #endif
45 
46 namespace Gecode { namespace Support {
47 
56  private:
57 #if defined(GECODE_USE_GETTIMEOFDAY)
58  timeval t0;
59 #elif defined(GECODE_USE_CLOCK)
60  clock_t t0;
61 #endif
62  public:
64  void start(void);
66  double stop(void);
67  };
68 
69  inline void
70  Timer::start(void) {
71 #if defined(GECODE_USE_GETTIMEOFDAY)
72  if (gettimeofday(&t0, NULL))
73  throw OperatingSystemError("Timer::start[gettimeofday]");
74 #elif defined(GECODE_USE_CLOCK)
75  t0 = clock();
76 #endif
77  }
78 
79  inline double
80  Timer::stop(void) {
81 #if defined(GECODE_USE_GETTIMEOFDAY)
82  timeval t1, t;
83  if (gettimeofday(&t1, NULL))
84  throw OperatingSystemError("Timer::stop[gettimeofday]");
85 
86  // t = t1 - t2
87  t.tv_sec = t1.tv_sec - t0.tv_sec;
88  t.tv_usec = t1.tv_usec - t0.tv_usec;
89  if (t.tv_usec < 0) {
90  t.tv_sec--;
91  t.tv_usec += 1000000;
92  }
93 
94  return (static_cast<double>(t.tv_sec) * 1000.0) +
95  (static_cast<double>(t.tv_usec)/1000.0);
96 #elif defined(GECODE_USE_CLOCK)
97  return (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC) * 1000.0;
98 #endif
99  }
100 
101 }}
102 
103 // STATISTICS: support-any
NodeType t
Type of node.
Definition: bool-expr.cpp:234
void stop(Support::Timer &timer, std::ostream &os)
Get time since start of timer and print user friendly time information.
Definition: script.cpp:46
void start(void)
Start timer.
Definition: timer.hpp:70
Exception: operating system error
Definition: exception.hpp:77
#define GECODE_SUPPORT_EXPORT
Definition: support.hh:75
double stop(void)
Get time since start of timer.
Definition: timer.hpp:80
Gecode toplevel namespace