timer_game_tick.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "../stdafx.h"
#include "timer.h"
#include "timer_game_tick.h"
 
#include "../safeguards.h"
 
TimerGameTick::TickCounter TimerGameTick::counter = 0;
 
template<>
void IntervalTimer<TimerGameTick>::Elapsed(TimerGameTick::TElapsed delta)
{
  if (this->period.value == 0) return;
 
  this->storage.elapsed += delta;
 
  uint count = 0;
  while (this->storage.elapsed >= this->period.value) {
    this->storage.elapsed -= this->period.value;
    count++;
  }
 
  if (count > 0) {
    this->callback(count);
  }
}
 
template<>
void TimeoutTimer<TimerGameTick>::Elapsed(TimerGameTick::TElapsed delta)
{
  if (this->fired) return;
  if (this->period.value == 0) return;
 
  this->storage.elapsed += delta;
 
  if (this->storage.elapsed >= this->period.value) {
    this->callback();
    this->fired = true;
  }
}
 
template<>
bool TimerManager<TimerGameTick>::Elapsed(TimerGameTick::TElapsed delta)
{
  TimerGameTick::counter++;
 
  for (auto timer : TimerManager<TimerGameTick>::GetTimers()) {
    timer->Elapsed(delta);
  }
 
  return true;
}
 
#ifdef WITH_ASSERT
template<>
void TimerManager<TimerGameTick>::Validate(TimerGameTick::TPeriod period)
{
  if (period.priority == TimerGameTick::Priority::NONE) return;
 
  /* Validate we didn't make a developer error and scheduled more than one
   * entry on the same priority. There can only be one timer on
   * a specific priority, to ensure we are deterministic, and to avoid
   * container sort order invariant issues with timer period saveload. */
  for (const auto &timer : TimerManager<TimerGameTick>::GetTimers()) {
    assert(timer->period.priority != period.priority);
  }
}
#endif /* WITH_ASSERT */