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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 | [&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 | } |