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/continuation.hpp> 12 13 namespace ctx = boost::context; 14 main()15int main() { 16 int data = 0; 17 ctx::continuation c = ctx::callcc( [&data](ctx::continuation && c) { 18 std::cout << "f1: entered first time: " << data << std::endl; 19 data += 1; 20 c = c.resume(); 21 std::cout << "f1: entered second time: " << data << std::endl; 22 data += 1; 23 c = c.resume(); 24 std::cout << "f1: entered third time: " << data << std::endl; 25 return std::move( c); 26 }); 27 std::cout << "f1: returned first time: " << data << std::endl; 28 data += 1; 29 c = c.resume(); 30 std::cout << "f1: returned second time: " << data << std::endl; 31 data += 1; 32 c = c.resume_with( [&data](ctx::continuation && c){ 33 std::cout << "f2: entered: " << data << std::endl; 34 data = -1; 35 return std::move( c); 36 }); 37 std::cout << "f1: returned third time" << std::endl; 38 std::cout << "main: done" << std::endl; 39 return EXIT_SUCCESS; 40 } 41