GNU Radio 3.5.3.2 C++ API
high_res_timer.h
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1 /*
2  * Copyright 2011 Free Software Foundation, Inc.
3  *
4  * This file is part of GNU Radio
5  *
6  * GNU Radio is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
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14  * GNU General Public License for more details.
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18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19  */
20 
21 #ifndef INCLUDED_GRUEL_HIGH_RES_TIMER_H
22 #define INCLUDED_GRUEL_HIGH_RES_TIMER_H
23 
24 namespace gruel {
25  //! Typedef for the timer tick count
26  typedef signed long long high_res_timer_type;
27 
28  //! Get the current time in ticks
30 
31  //! Get the number of ticks per second
33 
34  //! Get the tick count at the epoch
36 
37 } /* namespace gruel */
38 
39 ////////////////////////////////////////////////////////////////////////
40 // Use architecture defines to determine the implementation
41 ////////////////////////////////////////////////////////////////////////
42 #if defined(linux) || defined(__linux) || defined(__linux__)
43  #define GRUEL_HRT_USE_CLOCK_GETTIME
44 #elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
45  #define GRUEL_HRT_USE_QUERY_PERFORMANCE_COUNTER
46 #elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__)
47  #define GRUEL_HRT_USE_MACH_ABSOLUTE_TIME
48 #elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
49  #define GRUEL_HRT_USE_CLOCK_GETTIME
50 #else
51  #define GRUEL_HRT_USE_MICROSEC_CLOCK
52 #endif
53 
54 ////////////////////////////////////////////////////////////////////////
55 #ifdef GRUEL_HRT_USE_CLOCK_GETTIME
56  #include <ctime>
57 
59  timespec ts;
60  clock_gettime(CLOCK_MONOTONIC, &ts);
61  return ts.tv_sec*high_res_timer_tps() + ts.tv_nsec;
62  }
63 
65  return 1000000000UL;
66  }
67 #endif /* GRUEL_HRT_USE_CLOCK_GETTIME */
68 
69 ////////////////////////////////////////////////////////////////////////
70 #ifdef GRUEL_HRT_USE_MACH_ABSOLUTE_TIME
71  #include <mach/mach_time.h>
72 
74  return mach_absolute_time();
75  }
76 
78  mach_timebase_info_data_t info;
79  mach_timebase_info(&info);
80  return gruel::high_res_timer_type(info.numer*1000000000UL)/info.denom;
81  }
82 #endif
83 
84 ////////////////////////////////////////////////////////////////////////
85 #ifdef GRUEL_HRT_USE_QUERY_PERFORMANCE_COUNTER
86  #include <Windows.h>
87 
89  LARGE_INTEGER counts;
90  QueryPerformanceCounter(&counts);
91  return counts.QuadPart;
92  }
93 
95  LARGE_INTEGER freq;
96  QueryPerformanceFrequency(&freq);
97  return freq.QuadPart;
98  }
99 #endif
100 
101 ////////////////////////////////////////////////////////////////////////
102 #ifdef GRUEL_HRT_USE_MICROSEC_CLOCK
103  #include <boost/date_time/posix_time/posix_time.hpp>
104 
106  static const boost::posix_time::ptime epoch(boost::posix_time::from_time_t(0));
107  return (boost::posix_time::microsec_clock::universal_time() - epoch).ticks();
108  }
109 
111  return boost::posix_time::time_duration::ticks_per_second();
112  }
113 #endif
114 
115 ////////////////////////////////////////////////////////////////////////
116 #include <boost/date_time/posix_time/posix_time.hpp>
117 
119  static const double hrt_ticks_per_utc_ticks = gruel::high_res_timer_tps()/double(boost::posix_time::time_duration::ticks_per_second());
120  boost::posix_time::time_duration utc = boost::posix_time::microsec_clock::universal_time() - boost::posix_time::from_time_t(0);
121  return gruel::high_res_timer_now() - utc.ticks()*hrt_ticks_per_utc_ticks;
122 }
123 
124 #endif /* INCLUDED_GRUEL_HIGH_RES_TIMER_H */