/usr/include/opengm/utilities/timer.hxx is in libopengm-dev 2.3.6-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | #pragma once
#ifndef OPENGM_TIMER_HXX
#define OPENGM_TIMER_HXX
#include <stdexcept>
# if (defined(_OPENGM_TIMER_MACH__) || defined(__APPLE__))
# define OPENGM_TIMER_MAC
# elif (defined(_WIN32) || defined(WIN32) || defined(__CYGWIN__) || defined(__MINGW32__) || defined(_WIN64))
# define OPENGM_TIMER_WINDOWS
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN
# endif
# endif
# if defined(OPENGM_TIMER_MAC)
# include <mach/mach_time.h>
# elif defined(OPENGM_TIMER_WINDOWS)
# include <windows.h>
# undef min
# undef max
# else
# include <time.h>
# endif
namespace opengm {
/// Platform-independent runtime measurements
class Timer {
public:
// construction
Timer();
// query
double elapsedTime() const;
// manipulation
void tic();
void toc();
void reset();
private:
#if defined(OPENGM_TIMER_MAC)
typedef uint64_t TimerT;
typedef double TimerC;
#elif defined(OPENGM_TIMER_WINDOWS)
typedef LONGLONG TimerT;
typedef LARGE_INTEGER TimerC;
#else
typedef double TimerT;
typedef timespec TimerC;
#endif
TimerT start_;
#if !defined(OPENGM_TIMER_MAC)
TimerC ts_;
#endif
double duration_;
double conversionFactor_;
double elapsedTime_;
};
/// Platform-independent runtime measurements of functors
template<class FUNCTOR>
class Timing {
public:
typedef FUNCTOR Functor;
Timing(Functor, const size_t = 1);
const std::vector<double>& times() const;
private:
Functor functor_;
std::vector<double> times_;
};
inline Timer::Timer()
: start_(0), duration_(0), elapsedTime_(0)
{
#if defined(OPENGM_TIMER_MAC)
mach_timebase_info_data_t info;
mach_timebase_info(&info);
conversionFactor_ = (static_cast<double>(info.numer))/
(static_cast<double>(info.denom));
conversionFactor_ = conversionFactor_*1.0e-9;
#elif defined(OPENGM_TIMER_WINDOWS)
TimerC freq;
QueryPerformanceFrequency(&freq);
conversionFactor_ = 1.0/(static_cast<double>(freq.QuadPart));
#else
conversionFactor_ = 1.0;
#endif
reset();
}
inline void Timer::tic() {
#if defined(OPENGM_TIMER_MAC)
start_ = mach_absolute_time();
#elif defined(OPENGM_TIMER_WINDOWS)
QueryPerformanceCounter(&ts_);
start_ = ts_.QuadPart;
#else
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts_);
start_ = static_cast<double>(ts_.tv_sec) + 1.0e-9 *
static_cast<double>(ts_.tv_nsec);
#endif
}
inline void Timer::toc() {
#if defined(OPENGM_TIMER_MAC)
duration_ = static_cast<double>(mach_absolute_time() - start_);
#elif defined(OPENGM_TIMER_WINDOWS)
LARGE_INTEGER qpc_t; // ???
QueryPerformanceCounter(&qpc_t);
duration_ = static_cast<double>(qpc_t.QuadPart - start_);
#else
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts_);
duration_ = (static_cast<double>(ts_.tv_sec) + 1.0e-9 *
static_cast<double>(ts_.tv_nsec)) - start_;
#endif
elapsedTime_ = duration_*conversionFactor_;
}
inline void Timer::reset() {
start_ = 0;
duration_ = 0;
elapsedTime_ = 0;
}
inline double Timer::elapsedTime() const {
return elapsedTime_;
}
template<class FUNCTOR>
inline Timing<FUNCTOR>::Timing(
FUNCTOR functor,
const size_t repetitions
)
: functor_(functor),
times_(std::vector<double>())
{
if(repetitions < 1) {
throw std::runtime_error("The number of repetition must be at least 1.");
}
for(size_t j=0; j<repetitions; ++j) {
opengm::Timer timer;
timer.tic();
functor_();
timer.toc();
times_.push_back(timer.elapsedTime());
}
}
template<class FUNCTOR>
inline const std::vector<double>&
Timing<FUNCTOR>::times() const {
return times_;
}
} // namespace opengm
#if defined(OPENGM_TIMER_WINDOWS)
# undef WIN32_LEAN_AND_MEAN
#endif
#endif // OPENGM_TIMER_HXX
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