gistfile1.d

import std.stdio;
import core.thread;

class A {
    void opCall(int i) const shared {
        write(i);
    }
};

shared(const A) foo() {
    static shared A a = new A();
    
    return a;
}

void w() {
    for(int i = 0; i < 1000; ++i) {
        foo()(1);
    }
}

void w2() {
    for(int i = 0; i < 1000; ++i) {
        foo()(2);
    }
}

void main() {
    auto t1 = new Thread(&w);
    auto t2 = new Thread(&w2);
    
    t1.start();
    t2.start();
    
    t1.join();
    t2.join();
}