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- // Copyright Oliver Kowalke 2013.
- // 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 <iostream>
- #include <thread>
- #include <boost/assert.hpp>
- #include <boost/fiber/all.hpp>
- int count = 384;
- #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);
- }
- }
- void foo()
- {
- bar( count);
- boost::this_fiber::yield();
- }
- void thread_fn()
- {
- {
- boost::fibers::fiber f(
- #if defined(BOOST_USE_SEGMENTED_STACKS)
- std::allocator_arg,
- boost::fibers::segmented_stack(
- boost::fibers::segmented_stack::traits_type::default_size() ),
- #endif
- foo);
- f.join();
- }
- }
- int main( int argc, char * argv[])
- {
- #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 = " << boost::fibers::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 = " << boost::fibers::fixedsize_stack::traits_type::default_size() / 1024 << "kB" << std::endl;
- std::cout << "application might fail" << std::endl;
- #endif
- std::thread( thread_fn).join();
- std::cout << "done." << std::endl;
- return 0;
- }
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