lib/timestamp.cpp

   1 #include "timestamp.h"
   2
   3 #include <math.h>
   4 #include <time.h>
   5 #include <iostream>
   6 #include <chrono>
   7
   8 double amb::currentTime()
   9 {
  10         return Timestamp::instance()->currentTime();
  11 }
  12
  13 amb::Timestamp* amb::Timestamp::mInstance = nullptr;
  14
  15 amb::Timestamp::Timestamp()
  16 {
  17         auto tm = std::chrono::system_clock::now();
  18         auto tm2 = std::chrono::steady_clock::now();
  19
  20         double eTime = (std::chrono::duration_cast<std::chrono::milliseconds>(tm.time_since_epoch()).count() / 1000.00);
  21         double sTime = (std::chrono::duration_cast<std::chrono::milliseconds>(tm2.time_since_epoch()).count() / 1000.00);
  22
  23         startTimeEpoch =  eTime - sTime;
  24 }
  25
  26 double amb::Timestamp::currentTime()
  27 {
  28         auto tm = std::chrono::steady_clock::now();
  29
  30         double time = std::chrono::duration_cast<std::chrono::milliseconds>(tm.time_since_epoch()).count() / 1000.00;
  31
  32         return time;
  33 }
  34
  35 double amb::Timestamp::epochTime(double time)
  36 {
  37         return startTimeEpoch + time;
  38 }
  39
  40 double amb::Timestamp::currentTime(double time)
  41 {
  42     return time - startTimeEpoch;
  43 }
  44
  45 double amb::Timestamp::epochTime()
  46 {
  47         auto tm = std::chrono::system_clock::now();
  48
  49         double time = std::chrono::duration_cast<std::chrono::milliseconds>(tm.time_since_epoch()).count() / 1000.00;
  50
  51         return time;
  52 }
  53
  54 amb::Timestamp* amb::Timestamp::instance()
  55 {
  56         if(!mInstance)
  57                 mInstance = new Timestamp();
  58
  59         return mInstance;
  60 }
  61
  62 double amb::Timestamp::fromTimeval(const struct ::timeval &tv)
  63 {
  64     return tv.tv_sec*1.0 + tv.tv_usec*1e-6;
  65 }
  66
  67 struct ::timeval amb::Timestamp::toTimeval(const double time)
  68 {
  69     return { (__time_t) time, (__suseconds_t)fmod(time*1e6, 1e6) };
  70 }
  71
  72 struct ::bcm_timeval amb::Timestamp::toBcmTimeval(const double time)
  73 {
  74     return { (long) time, (long)fmod(time*1e6, 1e6) };
  75 }