source: tests/concurrent/futures/multi.cfa @ fe63ae6

#include <thread.hfa>
#include <future.hfa>

enum {NFUTURES = 10};

thread Server {
        int cnt, iteration;
        multi_future(int) * request;
};

void ?{}( Server & this ) {
        this.cnt = 0;
        this.iteration = 0;
        this.request = 0p;
}

void ^?{}( Server & mutex this ) {
        assert(this.cnt == 0);
    this.request = 0p;
}

void init( Server & this , multi_future(int) * f ) {
        this.request = f;
}

void process( Server & mutex this ) {
        fulfil( *this.request, this.iteration );
        this.iteration++;
}

void call( Server & mutex this ) {
        this.cnt++;
}

void finish( Server & mutex this ) { }

void main( Server & this ) {
        for() {
                waitfor( ^?{} : this ) {
                        break;
                }
                or when( this.cnt < NFUTURES ) waitfor( call: this ) {
                        if (this.cnt == NFUTURES) {
                                process(this);
                        }
                }
                or waitfor( finish: this ) {
                        if (this.cnt == NFUTURES) {
                                reset( *this.request );
                                this.cnt = 0;
                        }
                }
        }

}

Server * the_server;
thread Worker {};
multi_future(int) * shared_future;

void thrash(void) {
        volatile int locals[250];
        for(i; 250) {
                locals[i] = 0xdeadbeef;
        }
}

void work(int num) {
        call( *the_server );
        int res = wait( *shared_future );
        if( res != num ) abort();
        finish( *the_server );
}

void main( Worker & ) {
        for (i; 10) {
                thrash();
                work(i);
                thrash();
        }
}

int main() {
        printf( "start\n" );                            // non-empty .expect file
        processor procs[2];
        shared_future = new();
        {
                Server server;
                the_server = &server;
                init(server, shared_future);
                {
                        Worker workers[NFUTURES];
                }
        }
        delete( shared_future );
        printf( "done\n" );                             // non-empty .expect file
}