source: src/tests/coroutine.c@ fb31cb8

//
// Cforall Version 1.0.0 Copyright (C) 2017 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// fibonacci.c --
//
// Author           : Thierry Delisle
// Created On       : Thu Jun  8 07:29:37 2017
// Last Modified By : Peter A. Buhr
// Last Modified On : Sun Sep 17 21:38:15 2017
// Update Count     : 7
//

#include <fstream>
#include <coroutine>

coroutine Fibonacci {
        int fn;                                                                                         // used for communication
};

void ?{}( Fibonacci & this ) {
        this.fn = 0;
}

void main( Fibonacci & this ) {
        int fn1, fn2;                                                                           // retained between resumes
        this.fn = 0;                                                                            // case 0
        fn1 = this.fn;
        suspend();                                                                                      // restart last resume

        this.fn = 1;                                                                            // case 1
        fn2 = fn1;  fn1 = this.fn;
        suspend();                                                                                      // restart last resume

        for ( ;; ) {                                                                            // general case
                this.fn = fn1 + fn2;
                fn2 = fn1;  fn1 = this.fn;
                suspend();                                                                              // restart last resume
        } // for
}

int next( Fibonacci & this ) {
        resume( this );                                                                         // restart last suspend
        return this.fn;
}

int main() {
        Fibonacci f1, f2;
        for ( int i = 1; i <= 10; i += 1 ) {
                sout | next( f1 ) | next( f2 ) | endl;
        } // for
}

// Local Variables: //
// tab-width: 4 //
// compile-command: "cfa fibonacci.c" //
// End: //