| 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 | class moveable { |
| 15 | public: |
| 16 | int value; |
| 17 | |
| 18 | moveable() : |
| 19 | value( -1) { |
| 20 | } |
| 21 | |
| 22 | moveable( int v) : |
| 23 | value( v) { |
| 24 | } |
| 25 | |
| 26 | moveable( moveable && other) { |
| 27 | std::swap( a&: value, b&: other.value); |
| 28 | } |
| 29 | |
| 30 | moveable & operator=( moveable && other) { |
| 31 | if ( this == & other) return * this; |
| 32 | value = other.value; |
| 33 | other.value = -1; |
| 34 | return * this; |
| 35 | } |
| 36 | |
| 37 | moveable( moveable const& other) = delete; |
| 38 | moveable & operator=( moveable const& other) = delete; |
| 39 | }; |
| 40 | |
| 41 | int main() { |
| 42 | ctx::continuation c; |
| 43 | moveable data{ 1 }; |
| 44 | c = ctx::callcc( std::allocator_arg, salloc: ctx::fixedsize_stack{}, |
| 45 | fn: [&data](ctx::continuation && c){ |
| 46 | std::cout << "entered first time: "<< data.value << std::endl; |
| 47 | data = std::move( moveable{ 3 }); |
| 48 | c = c.resume(); |
| 49 | std::cout << "entered second time: "<< data.value << std::endl; |
| 50 | data = std::move( moveable{}); |
| 51 | return std::move( c); |
| 52 | }); |
| 53 | std::cout << "returned first time: "<< data.value << std::endl; |
| 54 | data.value = 5; |
| 55 | c = c.resume(); |
| 56 | std::cout << "returned second time: "<< data.value << std::endl; |
| 57 | std::cout << "main: done"<< std::endl; |
| 58 | return EXIT_SUCCESS; |
| 59 | } |
| 60 |