| 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 | |
| 10 | #include <boost/context/continuation.hpp> |
| 11 | |
| 12 | namespace ctx = boost::context; |
| 13 | |
| 14 | int main() { |
| 15 | ctx::continuation c; |
| 16 | int data = 1; |
| 17 | c = ctx::callcc( |
| 18 | fn: [&data](ctx::continuation && c){ |
| 19 | std::cout << "entered first time: "<< data << std::endl; |
| 20 | data += 2; |
| 21 | c = c.resume(); |
| 22 | std::cout << "entered second time: "<< data << std::endl; |
| 23 | return std::move( c); |
| 24 | }); |
| 25 | std::cout << "returned first time: "<< data << std::endl; |
| 26 | data += 2; |
| 27 | c = c.resume(); |
| 28 | if ( c) { |
| 29 | std::cout << "returned second time: "<< data << std::endl; |
| 30 | } else { |
| 31 | std::cout << "returned second time: execution context terminated"<< std::endl; |
| 32 | } |
| 33 | std::cout << "main: done"<< std::endl; |
| 34 | return EXIT_SUCCESS; |
| 35 | } |
| 36 |