52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
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// Copyright Oliver Kowalke 2014.
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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 <memory>
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#include <boost/context/continuation.hpp>
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namespace ctx = boost::context;
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#ifdef BOOST_MSVC //MS VisualStudio
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__declspec(noinline) void access( char *buf);
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#else // GCC
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void access( char *buf) __attribute__ ((noinline));
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#endif
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void access( char *buf) {
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buf[0] = '\0';
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}
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void bar( int i) {
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char buf[4 * 1024];
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if ( i > 0) {
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access( buf);
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std::cout << i << ". iteration" << std::endl;
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bar( i - 1);
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}
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}
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int main() {
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int count = 100*1024;
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#if defined(BOOST_USE_SEGMENTED_STACKS)
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std::cout << "using segmented_stack stacks: allocates " << count << " * 4kB == " << 4 * count << "kB on stack, ";
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std::cout << "initial stack size = " << ctx::segmented_stack::traits_type::default_size() / 1024 << "kB" << std::endl;
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std::cout << "application should not fail" << std::endl;
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#else
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std::cout << "using standard stacks: allocates " << count << " * 4kB == " << 4 * count << "kB on stack, ";
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std::cout << "initial stack size = " << ctx::fixedsize_stack::traits_type::default_size() / 1024 << "kB" << std::endl;
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std::cout << "application might fail" << std::endl;
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#endif
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ctx::continuation c = ctx::callcc(
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[count](ctx::continuation && c){
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bar( count);
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return std::move( c);
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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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