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timer.hpp
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1/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
2/*
3 * Main authors:
4 * Mikael Lagerkvist <lagerkvist@gecode.org>
5 *
6 * Copyright:
7 * Mikael Lagerkvist, 2009
8 *
9 * This file is part of Gecode, the generic constraint
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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
42namespace 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
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
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
Exception: operating system error
Definition exception.hpp:75
double stop(void)
Get time since start of timer.
Definition timer.hpp:76
void start(void)
Start timer.
Definition timer.hpp:66
Support algorithms and datastructures
Gecode toplevel namespace
#define GECODE_SUPPORT_EXPORT
Definition support.hh:71