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arangodb/3rdParty/boost/1.62.0/libs/context/example/v1/ontop.cpp

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// Copyright Oliver Kowalke 2014.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#include <cstdlib>
#include <iostream>
#include <boost/context/all.hpp>
boost::context::execution_context * ctx1 = nullptr;
boost::context::execution_context * ctx = nullptr;
void f1( void *) {
std::cout << "f1: entered first time" << std::endl;
( * ctx)();
std::cout << "f1: entered second time" << std::endl;
( * ctx)();
std::cout << "f1: entered third time" << std::endl;
( * ctx)();
}
void * f2( void * data) {
std::cout << "f2: entered" << std::endl;
return data;
}
int main() {
boost::context::execution_context ctx1_( f1);
ctx1 = & ctx1_;
boost::context::execution_context ctx_( boost::context::execution_context::current() );
ctx = & ctx_;
( * ctx1)();
std::cout << "f1: returned first time" << std::endl;
( * ctx1)();
std::cout << "f1: returned second time" << std::endl;
( * ctx1)( boost::context::exec_ontop_arg, f2);
std::cout << "f1: returned third time" << std::endl;
std::cout << "main: done" << std::endl;
return EXIT_SUCCESS;
}