context/example/fiber/jump.cpp
2018-02-09 17:27:35 +01:00

36 lines
1.1 KiB
C++

// Copyright Oliver Kowalke 2016.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <cstdlib>
#include <iostream>
#include <boost/context/fiber.hpp>
namespace ctx = boost::context;
int main() {
int data = 1;
ctx::fiber f{
[&data](ctx::fiber && f){
std::cout << "entered first time: " << data << std::endl;
data += 2;
f = std::move( f).resume();
std::cout << "entered second time: " << data << std::endl;
return std::move( f);
}};
f = std::move( f).resume();
std::cout << "returned first time: " << data << std::endl;
data += 2;
f = std::move( f).resume();
if ( f) {
std::cout << "returned second time: " << data << std::endl;
} else {
std::cout << "returned second time: execution context terminated" << std::endl;
}
std::cout << "main: done" << std::endl;
return EXIT_SUCCESS;
}