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39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
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// Copyright Oliver Kowalke 2016.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <cstdlib>
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#include <iostream>
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#include <boost/context/continuation.hpp>
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namespace ctx = boost::context;
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ctx::continuation f1( ctx::continuation && c) {
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int data = ctx::transfer_data< int >(c);
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std::cout << "f1: entered first time: " << data << std::endl;
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c = ctx::resume( std::move( c), data + 2);
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data = ctx::transfer_data< int >( c);
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std::cout << "f1: entered second time: " << data << std::endl;
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return std::move( c);
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}
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int main() {
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ctx::continuation c;
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int data = 1;
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c = ctx::callcc( f1, data);
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data = ctx::transfer_data< int >( c);
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std::cout << "f1: returned first time: " << data << std::endl;
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c = ctx::resume( std::move( c), data + 2);
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if ( ctx::data_available( c) ) {
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data = ctx::transfer_data< int >( c);
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std::cout << "f1: returned second time: " << data << std::endl;
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} else {
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std::cout << "f1: returned second time: no data" << std::endl;
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}
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std::cout << "main: done" << std::endl;
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return EXIT_SUCCESS;
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}
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