example-twocars.cpp

// Copyright © 2021 Bjørnar Steinnes Luteberget
// Licensed under the MIT license. See the LICENSE file for details.

#include <cstdio>
#include <string>

#include "simcpp.h"

class Car : public simcpp::Process {
public:
  explicit Car(simcpp::SimulationPtr sim, std::string name)
      : Process(sim), target_time(sim->get_now() + 100.0), name(name) {}

  bool Run() override {
    auto sim = this->sim.lock();

    PT_BEGIN();

    while (sim->get_now() < target_time) {
      PROC_WAIT_FOR(sim->timeout(5.0));
      printf("Car %s running at %g.\n", name.c_str(), sim->get_now());
    }

    PT_END();
  }

private:
  bool finished = false;
  double target_time;
  std::string name;
};

class TwoCars : public simcpp::Process {
public:
  explicit TwoCars(simcpp::SimulationPtr sim) : Process(sim) {}

  bool Run() override {
    auto sim = this->sim.lock();

    PT_BEGIN();

    printf("Starting car C1.\n");
    PROC_WAIT_FOR(sim->start_process<Car>("C1"));
    printf("Finished car C1.\n");

    printf("Starting car C2.\n");
    PROC_WAIT_FOR(sim->start_process<Car>("C2"));
    printf("Finished car C2.\n");

    PT_END();
  }
};

int main() {
  auto sim = simcpp::Simulation::create();
  sim->start_process<TwoCars>();
  sim->advance_by(10000);

  return 0;
}