SharedGlobals.cc

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#include "SharedGlobals.h"
#include "Simulator.h"

const char * const SharedGlobals::runlevel_names[SharedGlobals::NUM_RUNLEVELS+1] = {
  "CREATED",
  "CONSTRUCTING",
  "STARTING",
  "RUNNING",
  "STOPPING",
  "DESTRUCTING",
  "DESTRUCTED",
  NULL
};

ipc_setup_t * ipc_setup=NULL;
SharedGlobals * globals=NULL;

unsigned int SharedGlobals::get_time() {
  decltype(lastTimeScale) lastLastTimeScale=lastTimeScale; // used to avoid repeated "pause" commands if we're past autoPauseTime
  if(timeScale<=0) {
    //just need to update lastTimeScale in case it had been realtime mode
    //adding an 'if' to test before the assignment is slower than just always doing the assignment
    lastTimeScale=timeScale;
  } else {
    if(lastTimeScale<=0) {
      //switching from non-realtime to realtime mode -- reset time offset
      timeOffset=bootTime.Age().Value()*timeScale*1000-simulatorTime;
      lastTimeScale=timeScale;
      //we reset timeOffset such that simulatorTime hasn't changed
    } else if(lastTimeScale!=timeScale) {
      //switching speeds -- reset time offset
      simulatorTime=get_real_time(lastTimeScale);
      timeOffset=bootTime.Age().Value()*timeScale*1000-simulatorTime;
      lastTimeScale=timeScale;
    } else {
      simulatorTime=get_real_time(timeScale);
    }
    //cout << timeOffset << ' ' << lastTimeScale << ' ' << timeScale << endl;
  }
  if(simulatorTime>autoPauseTime) {
    simulatorTime=autoPauseTime;
    if(ProcessID::getID()==ProcessID::SimulatorProcess) {
      if(timeScale!=0) // don't reset it if it's already set -- triggers infinite recursion if/when the hook calls get_time
        timeScale=0;
    } else {
      // can't set timeScale directly because Simulator process has hooks registered and we aren't in the Simulator process
      if(lastLastTimeScale!=0) {
        lastTimeScale=0;
        Simulator::sendCommand("pause quiet"); // so do this instead
      }
    }
  }
  return simulatorTime;
}

float SharedGlobals::getTimeScale() const { return (float)timeScale; }

/*! @file
 * @brief A class to hold various simulator parameters which need to be accessed from multiple processes
 * @author ejt (Creator)
 */