source: doc/theses/colby_parsons_MMAth/code/basic_actor_example.cfa@ 0ec4eb0

#include <stdio.h>
#include <string.h>
#include <actor.hfa>

struct derived_actor {
    inline actor;       // Plan-9 C nominal inheritance
};
void ?{}( derived_actor & this ) { // Default constructor definition
    ((actor &)this){};  // Call to actor constructor
}

struct derived_msg {
    inline message;     // Plan-9 C nominal inheritance
    char word[12];
};
void ?{}( derived_msg & this, char * new_word ) { // Overload constructor definition
    ((message &) this){ Finished }; // Call to message constructor passing allocation status
    strcpy(this.word, new_word);
}

allocation receive( derived_actor & receiver, derived_msg & msg ) {
    printf("The message contained the string: %s\n", msg.word);
    return Finished; // Return allocation status of Finished now that the actor is done work
}

int main() {
    start_actor_system(); // Sets up executor. Actors and messages can be created after this point.
    derived_actor my_actor;         
    derived_msg my_msg{ "Hello World" }; // Constructor call
    my_actor | my_msg;   // All message sends are done through the bar operator
    stop_actor_system(); // Waits until all actors are finished
    return 0;
}