ceph/src/boost/libs/context/example/v2/throw.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 #include <stdexcept>
  10 #include <tuple>
  11
  12 #include <boost/context/all.hpp>
  13
  14 struct my_exception {
  15     boost::context::execution_context< void >   ctx;
  16
  17     my_exception( boost::context::execution_context< void > && ctx_) :
  18         ctx( std::forward< boost::context::execution_context< void > >( ctx_) ) {
  19     }
  20 };
  21
  22 boost::context::execution_context<void> f1(boost::context::execution_context<void> ctx) {
  23     try {
  24         for (;;) {
  25             std::cout << "f1()" << std::endl;
  26             ctx = ctx();
  27         }
  28     } catch ( my_exception & e) {
  29         std::cout << "f1(): my_exception catched" << std::endl;
  30         ctx = std::move( e.ctx);
  31     }
  32     return ctx;
  33 }
  34
  35 boost::context::execution_context<void> f2(boost::context::execution_context<void> ctx) {
  36     throw my_exception( std::move( ctx) );
  37     return ctx;
  38 }
  39
  40 int main() {
  41     boost::context::execution_context< void > ctx( f1);
  42     ctx = ctx();
  43     ctx = ctx();
  44     ctx = ctx( boost::context::exec_ontop_arg, f2);
  45
  46     std::cout << "main: done" << std::endl;
  47
  48     return EXIT_SUCCESS;
  49 }