source: doc/theses/colby_parsons_MMAth/benchmarks/actors/caf/CAFRepeat.cpp @ fa5e1aa5

#include <iostream>
using namespace std;
#include <chrono>
using namespace chrono;

#include "caf/actor_ostream.hpp"
#include "caf/caf_main.hpp"
#include "caf/event_based_actor.hpp"
#include "caf/all.hpp"
using namespace caf;

struct IntMsg;
struct CharMsg;

CAF_BEGIN_TYPE_ID_BLOCK(custom_types_1, first_custom_type_id)
CAF_ADD_TYPE_ID(custom_types_1, (IntMsg))
CAF_ADD_TYPE_ID(custom_types_1, (CharMsg))
CAF_END_TYPE_ID_BLOCK(custom_types_1)

// --(rst-foo-begin)--
struct IntMsg {
        int val;
};
struct CharMsg {
        char val;
};

template <class Inspector>
bool inspect(Inspector& f, IntMsg& x) {
        return f.object(x).fields(f.field("val", x.val));
}

template <class Inspector>
bool inspect(Inspector& f, CharMsg& x) {
        return f.object(x).fields(f.field("val", x.val));
}

size_t Messages = 100000, Processors = 4, Times = 100, Factor = 20;

time_point<steady_clock> starttime;
actor * client;
actor * servers;
unsigned int actorCnt = 0;

class Client : public event_based_actor {
    IntMsg * intmsg;
        CharMsg * charmsg;
        size_t results = 0, times = 0;

    void reset() {
                times += 1;
                if ( times == Times ) {
                        for ( unsigned int i = 0; i < Messages; i += 1 ) {
                this->send( servers[i], 0 );
                        } // for
                        if ( __atomic_add_fetch( &actorCnt, 1, __ATOMIC_SEQ_CST ) == Messages + 1 ) {
                aout(this) << (steady_clock::now() - starttime).count() * Factor / 1'000'000'000.0 << endl;
            } // if
            this->quit();
            return;
                }
                results = 0;
                this->send( this, 0 );
        }
    
        behavior make_behavior() override {
                return {
                        [=]( IntMsg & msg ) -> void {
                                results++;
                if ( results == 2 * Messages ) reset();
                        },
            [=]( CharMsg & msg ) -> void {
                results++;
                if ( results == 2 * Messages ) reset();
            },
            [=]( int & ) -> void {
                for ( size_t i = 0; i < Messages; i += 1 ) { // send out work
                    this->send( servers[i], intmsg[i] );
                    this->send( servers[i], charmsg[i] );
                }
            }
                };
        }
  public:
        Client( caf::actor_config & cfg ) : event_based_actor( cfg ) {
        intmsg = new IntMsg[Messages];
                charmsg = new CharMsg[Messages];
    }
    ~Client() {
                delete [] charmsg;
                delete [] intmsg;
        }
}; // Client

class Server : public event_based_actor {
        behavior make_behavior() override {
                return {
                        [=]( IntMsg & msg ) -> void {
                                msg.val = 7;
                send( *client, msg );
                        },
            [=]( CharMsg & msg ) -> void {
                msg.val = 'x';
                this->send( *client, msg );
            },
            [=]( int & ) -> void {
                if ( __atomic_add_fetch( &actorCnt, 1, __ATOMIC_SEQ_CST ) == Messages + 1 ) {
                                        aout(this) << (steady_clock::now() - starttime).count() / 1'000'000'000.0 << endl;
                                } // if
                this->quit();
                                return;
            }
                };
        }
  public:
        Server( caf::actor_config & cfg ) : event_based_actor( cfg ) {}
}; // Server

void caf_main( actor_system & sys ) {
        starttime = steady_clock::now();

    *client = sys.spawn<Client>();

        for ( unsigned int i = 0; i < Messages; i += 1 ) {              // create actors
                servers[i] = sys.spawn<Server>();
        } // for

        caf::scoped_actor self{sys};
    self->send( *client, 0 );
} // caf_main

int main( int argc, char * argv[] ) {
        switch ( argc ) {
      case 5:
                if ( strcmp( argv[4], "d" ) != 0 ) {                    // default ?
                        Factor = stoi( argv[4] );
                        if ( Factor < 1 ) goto Usage;
                } // if
      case 4:
                if ( strcmp( argv[3], "d" ) != 0 ) {                    // default ?
                        Times = stoi( argv[3] );
                        if ( Times < 1 ) goto Usage;
                } // if
          case 3:
                if ( strcmp( argv[2], "d" ) != 0 ) {                    // default ?
                        Processors = stoi( argv[2] );
                        if ( Processors < 1 ) goto Usage;
                } // if
          case 2:
                if ( strcmp( argv[1], "d" ) != 0 ) {                    // default ?
                        Messages = stoi( argv[1] );
                        if ( Messages < 1 ) goto Usage;
                } // if
          case 1:                                                                                       // use defaults
                break;
          default:
          Usage:
                cerr << "Usage: " << argv[0]
                         << ") ] [ messages (> 0) | 'd' (default " << Messages
                         << ") ] [ processors (> 0) | 'd' (default " << Processors
             << ") ] [ Times (> 0) | 'd' (default " << Times
                         << ") ]" << endl;
                exit( EXIT_FAILURE );
        } // switch

    Times = Times / Factor;

        //cout << Actors << " " << Set << " " << Rounds << " " << Processors << endl;
        servers = new actor[Messages];
    client = new actor();

        caf::core::init_global_meta_objects();
        caf::exec_main_init_meta_objects<id_block::custom_types_1>();
    // caf::exec_main_init_meta_objects<>();

        caf::actor_system_config cfg;
        cfg.set( "caf.scheduler.max-threads", Processors );
        caf::actor_system system { cfg };

        caf::exec_main<>(caf_main, argc, argv);
} // main


// /usr/bin/time -f "%Uu %Ss %Er %Mkb" a.out

// Local Variables: //
// compile-command: "g++-10 -Wall -O3 -std=c++17 -ICAF/actor-framework/libcaf_core -ICAF/actor-framework/libcaf_core/caf -ICAF/actor-framework/build/libcaf_core -LCAF/actor-framework/build/libcaf_core -LCAF/actor-framework/build/libcaf_io CAFMatrix.cpp -lcaf_io -lcaf_core -Wl,-rpath=CAF/actor-framework/build/libcaf_core" //
// End: //