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 f1(ctx::continuation && c)15ctx::continuation f1( ctx::continuation && c) { 16 std::cout << "f1: entered first time" << std::endl; 17 c = c.resume(); 18 std::cout << "f1: entered second time" << std::endl; 19 c = c.resume(); 20 std::cout << "f1: entered third time" << std::endl; 21 return std::move( c); 22 } 23 f2(ctx::continuation && c)24ctx::continuation f2( ctx::continuation && c) { 25 std::cout << "f2: entered" << std::endl; 26 return std::move( c); 27 } 28 main()29int main() { 30 ctx::continuation c = ctx::callcc( f1); 31 std::cout << "f1: returned first time" << std::endl; 32 c = c.resume(); 33 std::cout << "f1: returned second time" << std::endl; 34 c = c.resume_with( f2); 35 std::cout << "f1: returned third time" << std::endl; 36 37 std::cout << "main: done" << std::endl; 38 39 return EXIT_SUCCESS; 40 } 41