Dogcows Code - chaz/openbox/blob - otk/timer.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 #include "timer.hh"
   8 #include "timerqueuemanager.hh"
   9
  10 namespace otk {
  11
  12 static timeval normalizeTimeval(const timeval &tm)
  13 {
  14   timeval ret = tm;
  15
  16   while (ret.tv_usec < 0) {
  17     if (ret.tv_sec > 0) {
  18       --ret.tv_sec;
  19       ret.tv_usec += 1000000;
  20     } else {
  21       ret.tv_usec = 0;
  22     }
  23   }
  24
  25   if (ret.tv_usec >= 1000000) {
  26     ret.tv_sec += ret.tv_usec / 1000000;
  27     ret.tv_usec %= 1000000;
  28   }
  29
  30   if (ret.tv_sec < 0) ret.tv_sec = 0;
  31
  32   return ret;
  33 }
  34
  35
  36 Timer::Timer(TimerQueueManager *m, TimeoutHandler h, TimeoutData d)
  37 {
  38   _manager = m;
  39   _handler = h;
  40   _data = d;
  41
  42   _recur = _timing = false;
  43 }
  44
  45
  46 Timer::~Timer(void)
  47 {
  48   if (_timing) stop();
  49 }
  50
  51
  52 void Timer::setTimeout(long t)
  53 {
  54   _timeout.tv_sec = t / 1000;
  55   _timeout.tv_usec = t % 1000;
  56   _timeout.tv_usec *= 1000;
  57 }
  58
  59
  60 void Timer::setTimeout(const timeval &t)
  61 {
  62   _timeout.tv_sec = t.tv_sec;
  63   _timeout.tv_usec = t.tv_usec;
  64 }
  65
  66
  67 void Timer::start(void)
  68 {
  69   gettimeofday(&_start, 0);
  70
  71   if (! _timing) {
  72     _timing = true;
  73     _manager->addTimer(this);
  74   }
  75 }
  76
  77
  78 void Timer::stop(void)
  79 {
  80   if (_timing) {
  81     _timing = false;
  82
  83     _manager->removeTimer(this);
  84   }
  85 }
  86
  87
  88 void Timer::fire(void)
  89 {
  90   if (_handler)
  91     _handler(_data);
  92 }
  93
  94
  95 timeval Timer::remainingTime(const timeval &tm) const
  96 {
  97   timeval ret = endTime();
  98
  99   ret.tv_sec  -= tm.tv_sec;
 100   ret.tv_usec -= tm.tv_usec;
 101
 102   return normalizeTimeval(ret);
 103 }
 104
 105
 106 timeval Timer::endTime(void) const
 107 {
 108   timeval ret;
 109
 110   ret.tv_sec = _start.tv_sec + _timeout.tv_sec;
 111   ret.tv_usec = _start.tv_usec + _timeout.tv_usec;
 112
 113   return normalizeTimeval(ret);
 114 }
 115
 116
 117 bool Timer::shouldFire(const timeval &tm) const
 118 {
 119   timeval end = endTime();
 120
 121   return ! ((tm.tv_sec < end.tv_sec) ||
 122             (tm.tv_sec == end.tv_sec && tm.tv_usec < end.tv_usec));
 123 }
 124
 125 }