ceph/src/boost/libs/coroutine/example/symmetric/unwind.cpp

   1
   2 //          Copyright Oliver Kowalke 2009.
   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/bind.hpp>
  11 #include <boost/coroutine/all.hpp>
  12
  13 struct X : private boost::noncopyable
  14 {
  15     X() { std::cout << "X()" << std::endl; }
  16     ~X() { std::cout << "~X()" << std::endl; }
  17 };
  18
  19 typedef boost::coroutines::symmetric_coroutine< void >  coro_t;
  20
  21 coro_t::call_type * c1 = 0;
  22 coro_t::call_type * c2 = 0;
  23
  24 void foo( coro_t::yield_type & yield)
  25 {
  26     X x;
  27     std::cout << "foo() entered" << std::endl;
  28     yield( * c2);
  29     yield( * c2);
  30     std::cout << "foo() finished" << std::endl;
  31 }
  32
  33 void bar( coro_t::yield_type & yield)
  34 {
  35     std::cout << "bar() entered" << std::endl;
  36     yield( * c1);
  37     std::cout << "bar() finished" << std::endl;
  38 }
  39
  40 int main( int argc, char * argv[])
  41 {
  42     coro_t::call_type coro1( foo);
  43     coro_t::call_type coro2( bar);
  44     c1 = & coro1;
  45     c2 = & coro2;
  46     coro1();
  47     std::cout << "Done" << std::endl;
  48
  49     return EXIT_SUCCESS;
  50 }