/* * This file is part of MXE. See LICENSE.md for licensing information. */ #include <iostream>#include <boost/archive/xml_oarchive.hpp>#include <boost/thread/thread.hpp>#include <boost/thread/tss.hpp> boost::thread_specific_ptr<int> ptr; // http://www.boost.org/doc/libs/1_60_0/libs/context/doc/html/context/context.html#include <boost/context/all.hpp>boost::context::fcontext_t fcm,fc1,fc2; void test_thread(){    if (ptr.get() == 0) {        ptr.reset(new int(0));    }    std::cout << "Hello, World! from thread" << std::endl;} void f1(intptr_t){    std::cout<<"f1: entered"<<std::endl;    std::cout<<"f1: call jump_fcontext( & fc1, fc2, 0)"<< std::endl;    boost::context::jump_fcontext(&fc1,fc2,0);    std::cout<<"f1: return"<<std::endl;    boost::context::jump_fcontext(&fc1,fcm,0);} void f2(intptr_t){    std::cout<<"f2: entered"<<std::endl;    std::cout<<"f2: call jump_fcontext( & fc2, fc1, 0)"<<std::endl;    boost::context::jump_fcontext(&fc2,fc1,0);    BOOST_ASSERT(false&&!"f2: never returns");} int main(int argc, char *argv[]){    (void)argc;    (void)argv;     boost::archive::xml_oarchive oa(std::cout);    std::string s = "\n\n    Hello, World!\n\n";    oa << BOOST_SERIALIZATION_NVP(s);     boost::thread thrd(test_thread);    thrd.join();     std::size_t size(8192);    void* sp1(std::malloc(size));    void* sp2(std::malloc(size));     fc1=boost::context::make_fcontext(sp1,size,f1);    fc2=boost::context::make_fcontext(sp2,size,f2);     std::cout<<"main: call jump_fcontext( & fcm, fc1, 0)"<<std::endl;    boost::context::jump_fcontext(&fcm,fc1,0);     return 0;}