twoprocesses.cc

This is an example of how to program a simple simulation with two very simple iterative processes. To compile this example on a GNU/Linux system or on other Unix-like systems, assuming SSim has been installed in $prefix, execute:

c++ twoprocesses.cc -o twoprocesses -I$prefix/include -L$prefix/lib -lssim

//
// twoprocesses.cc
//
#include <string>
#include <iostream>

#include <siena/ssim.h>

using namespace std;
using namespace ssim;

//
// this is a simple iterative process
//
class Client: public Process {
    int iterations;
    int interval;
    string name;
 public:
    Client(const string &n, int i, int delta): 
        iterations(i), interval(delta), name(n) {};

    virtual void                init(void);
    virtual void                process_event(const Event *);
};

void Client::init() { 
    //
    // we start immediately by giving ourselves an immediate "timeout"
    //
    Sim::self_signal_event(NULL, 0);
}

void Client::process_event(const Event * e) { 
    if (e != 0) {
        cerr << "Client: sorry, I have not been programmed to handle events"
             << "only \"timeouts\", please." << endl;
        return;
    }
    cout << "I am " << name << ", the time is " << Sim::clock();
    if (iterations > 0) {
        cout << ", " << iterations << " to go!";
        --iterations;
        Sim::self_signal_event(NULL, interval);
    } else {
        cout << ", no more iteration.  Bye!";
    }
    cout << endl;
}

int main(int argc, char *argv[]) {

    Client c1("Yanyan", 10,100);
    Client c2("Antonio", 30,50);

    Sim::create_process(&c1);
    Sim::create_process(&c2);

    Sim::run_simulation();

    return 0;
}