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