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timer.hpp
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1 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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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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33 
34 #ifdef GECODE_USE_GETTIMEOFDAY
35 #include <sys/time.h>
36 #endif
37 
38 #ifdef GECODE_USE_CLOCK
39 #include <ctime>
40 #endif
41 
42 namespace Gecode { namespace Support {
43 
52  private:
53 #if defined(GECODE_USE_GETTIMEOFDAY)
54  timeval t0;
55 #elif defined(GECODE_USE_CLOCK)
56  clock_t t0;
57 #endif
58  public:
60  void start(void);
62  double stop(void);
63  };
64 
65  inline void
66  Timer::start(void) {
67 #if defined(GECODE_USE_GETTIMEOFDAY)
68  if (gettimeofday(&t0, NULL))
69  throw OperatingSystemError("Timer::start[gettimeofday]");
70 #elif defined(GECODE_USE_CLOCK)
71  t0 = clock();
72 #endif
73  }
74 
75  inline double
76  Timer::stop(void) {
77 #if defined(GECODE_USE_GETTIMEOFDAY)
78  timeval t1, t;
79  if (gettimeofday(&t1, NULL))
80  throw OperatingSystemError("Timer::stop[gettimeofday]");
81 
82  // t = t1 - t2
83  t.tv_sec = t1.tv_sec - t0.tv_sec;
84  t.tv_usec = t1.tv_usec - t0.tv_usec;
85  if (t.tv_usec < 0) {
86  t.tv_sec--;
87  t.tv_usec += 1000000;
88  }
89 
90  return (static_cast<double>(t.tv_sec) * 1000.0) +
91  (static_cast<double>(t.tv_usec)/1000.0);
92 #elif defined(GECODE_USE_CLOCK)
93  return (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC) * 1000.0;
94 #endif
95  }
96 
97 }}
98 
99 // STATISTICS: support-any
NodeType t
Type of node.
Definition: bool-expr.cpp:230
void stop(Support::Timer &timer, std::ostream &os)
Get time since start of timer and print user friendly time information.
Definition: script.cpp:42
void start(void)
Start timer.
Definition: timer.hpp:66
Exception: operating system error
Definition: exception.hpp:75
#define GECODE_SUPPORT_EXPORT
Definition: support.hh:71
double stop(void)
Get time since start of timer.
Definition: timer.hpp:76
Gecode toplevel namespace