ceph/src/boost/libs/context/example/v1/ontop.cpp

   1
   2 //          Copyright Oliver Kowalke 2014.
   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/all.hpp>
  11
  12 boost::context::execution_context * ctx1 = nullptr;
  13 boost::context::execution_context * ctx = nullptr;
  14
  15 void f1( void *) {
  16     std::cout << "f1: entered first time" << std::endl;
  17     ( * ctx)();
  18     std::cout << "f1: entered second time" << std::endl;
  19     ( * ctx)();
  20     std::cout << "f1: entered third time" << std::endl;
  21     ( * ctx)();
  22 }
  23
  24 void * f2( void * data) {
  25     std::cout << "f2: entered" << std::endl;
  26     return data;
  27 }
  28
  29 int main() {
  30     boost::context::execution_context ctx1_( f1);
  31     ctx1 = & ctx1_;
  32     boost::context::execution_context ctx_( boost::context::execution_context::current() );
  33     ctx = & ctx_;
  34
  35     ( * ctx1)();
  36     std::cout << "f1: returned first time" << std::endl;
  37     ( * ctx1)();
  38     std::cout << "f1: returned second time" << std::endl;
  39     ( * ctx1)( boost::context::exec_ontop_arg, f2);
  40     std::cout << "f1: returned third time" << std::endl;
  41
  42     std::cout << "main: done" << std::endl;
  43
  44     return EXIT_SUCCESS;
  45 }