ceph/src/boost/libs/context/example/v1/parameter.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 <exception>
   9 #include <iostream>
  10 #include <memory>
  11 #include <string>
  12
  13 #include <boost/context/all.hpp>
  14 #include <boost/lexical_cast.hpp>
  15
  16 class X{
  17 private:
  18     std::exception_ptr excptr_;
  19     boost::context::execution_context caller_;
  20     boost::context::execution_context callee_;
  21
  22 public:
  23     X():
  24         excptr_(),
  25         caller_(boost::context::execution_context::current()),
  26         callee_( [this]( void * vp){
  27                     try {
  28                         int i = * static_cast< int * >( vp);
  29                         std::string str = boost::lexical_cast<std::string>(i);
  30                         caller_( & str);
  31                     } catch ( std::bad_cast const&) {
  32                         excptr_=std::current_exception();
  33                     }
  34                  })
  35     {}
  36
  37     std::string operator()(int i){
  38         void * ret = callee_( & i);
  39         if(excptr_){
  40             std::rethrow_exception(excptr_);
  41         }
  42         return * static_cast< std::string * >( ret);
  43     }
  44 };
  45
  46 int main() {
  47     X x;
  48     std::cout<<x(7)<<std::endl;
  49     std::cout << "done" << std::endl;
  50     return EXIT_SUCCESS;
  51 }