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

00001 //
00002 // twoprocesses.cc
00003 //
00004 #include <string>
00005 #include <iostream>
00006 
00007 #include <siena/ssim.h>
00008 
00009 using namespace std;
00010 using namespace ssim;
00011 
00012 //
00013 // this is a simple iterative process
00014 //
00015 class Client: public Process {
00016     int iterations;
00017     int interval;
00018     string name;
00019  public:
00020     Client(const string &n, int i, int delta): 
00021         iterations(i), interval(delta), name(n) {};
00022 
00023     virtual void                init(void);
00024     virtual void                process_event(const Event *);
00025 };
00026 
00027 void Client::init() { 
00028     //
00029     // we start immediately by giving ourselves an immediate "timeout"
00030     //
00031     Sim::self_signal_event(NULL, 0);
00032 }
00033 
00034 void Client::process_event(const Event * e) { 
00035     if (e != 0) {
00036         cerr << "Client: sorry, I have not been programmed to handle events"
00037              << "only \"timeouts\", please." << endl;
00038         return;
00039     }
00040     cout << "I am " << name << ", the time is " << Sim::clock();
00041     if (iterations > 0) {
00042         cout << ", " << iterations << " to go!";
00043         --iterations;
00044         Sim::self_signal_event(NULL, interval);
00045     } else {
00046         cout << ", no more iteration.  Bye!";
00047     }
00048     cout << endl;
00049 }
00050 
00051 int main(int argc, char *argv[]) {
00052 
00053     Client c1("Yanyan", 10,100);
00054     Client c2("Antonio", 30,50);
00055 
00056     Sim::create_process(&c1);
00057     Sim::create_process(&c2);
00058 
00059     Sim::run_simulation();
00060 
00061     return 0;
00062 }
00063 
00064