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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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