source: doc/theses/colby_parsons_MMAth/benchmarks/actors/ucpp/uC++SendDynamic.cc

#include <iostream>
using namespace std;
#include <chrono>
using namespace chrono;
#include <uActor.h>

int Times = 100'000'000;                                                                // default values
time_point<steady_clock> starttime;

struct Msg : public uActor::Message { int cnt; Msg( int cnt ) : Message( uActor::Delete ), cnt( cnt ) {} };

_Actor Send {
        Allocation receive( Message & msg ) {
                Case ( Msg, msg ) {
                        if ( msg_d->cnt >= Times ) {
                                cout << (steady_clock::now() - starttime).count() / Times << endl;
                                return Delete;
                        } // if
                        //cout << msg_d->cnt << endl;
                        *(new Send) | *new Msg{ msg_d->cnt + 1 };       // dynamic actor / message send self
                } // Case
                return Delete;
        } // Send:::receive
}; // Send

int main( int argc, char * argv[] ) {
        switch ( argc ) {
          case 2:
                if ( strcmp( argv[1], "d" ) != 0 ) { Times = stoi( argv[1] ); }
                if ( Times < 1 ) goto Usage;
          case 1:                                                                                       // use defaults
                break;
          default:
          Usage:
                cerr << "Usage: " << argv[0] << " [ times (> 0) ]" << endl;
                exit( EXIT_FAILURE );
        } // switch

        uActor::start();                                                                        // start actor system
        starttime = steady_clock::now();
        *(new Send) | *new Msg{ 0 };
        uActor::stop();                                                                         // wait for all actors to terminate
} // main

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

// Local Variables: //
// compile-command: "u++-work -g -Wall -Wextra -O3 -nodebug -DNDEBUG -multi uC++SendDynamic.cc" //
// End: //