ceph/src/boost/libs/context/example/fiber/fibonacci.cpp

   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 <memory>
  10
  11 #include <boost/context/fiber.hpp>
  12
  13 namespace ctx = boost::context;
  14
  15 int main() {
  16     int a;
  17     ctx::fiber f{
  18         [&a](ctx::fiber && f){
  19             a=0;
  20             int b=1;
  21             for(;;){
  22                 f = std::move( f).resume();
  23                 int next=a+b;
  24                 a=b;
  25                 b=next;
  26             }
  27             return std::move( f);
  28         }};
  29     for ( int j = 0; j < 10; ++j) {
  30         f = std::move( f).resume();
  31         std::cout << a << " ";
  32     }
  33     std::cout << std::endl;
  34     std::cout << "main: done" << std::endl;
  35     return EXIT_SUCCESS;
  36 }