1
2// Copyright Oliver Kowalke 2016.
3// Distributed under the Boost Software License, Version 1.0.
4// (See accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt)
6
7#include <cstdlib>
8#include <iostream>
9#include <tuple>
10
11#include <boost/context/fiber.hpp>
12
13namespace ctx = boost::context;
14
15int main() {
16 int data = 0;
17 ctx::fiber f{ [&data](ctx::fiber && f) {
18 std::cout << "f1: entered first time: " << data << std::endl;
19 data += 1;
20 f = std::move( f).resume();
21 std::cout << "f1: entered second time: " << data << std::endl;
22 data += 1;
23 f = std::move( f).resume();
24 std::cout << "f1: entered third time: " << data << std::endl;
25 return std::move( f);
26 }};
27 f = std::move( f).resume();
28 std::cout << "f1: returned first time: " << data << std::endl;
29 data += 1;
30 f = std::move( f).resume();
31 std::cout << "f1: returned second time: " << data << std::endl;
32 data += 1;
33 f = std::move( f).resume_with(fn: [&data](ctx::fiber && f){
34 std::cout << "f2: entered: " << data << std::endl;
35 data = -1;
36 return std::move( f);
37 });
38 std::cout << "f1: returned third time" << std::endl;
39 std::cout << "main: done" << std::endl;
40 return EXIT_SUCCESS;
41}
42

source code of boost/libs/context/example/fiber/ontop.cpp