diff options
Diffstat (limited to 'libs/context/example/execution_context/segmented.cpp')
-rw-r--r-- | libs/context/example/execution_context/segmented.cpp | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/libs/context/example/execution_context/segmented.cpp b/libs/context/example/execution_context/segmented.cpp new file mode 100644 index 000000000..6f5e457d1 --- /dev/null +++ b/libs/context/example/execution_context/segmented.cpp @@ -0,0 +1,68 @@ + +// 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 <boost/config.hpp> + +#include <boost/context/all.hpp> + +#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 = 384; + +#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::context::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::context::fixedsize_stack::traits_type::default_size() / 1024 << "kB" << std::endl; + std::cout << "application might fail" << std::endl; +#endif + + boost::context::execution_context main_ctx( + boost::context::execution_context::current() ); + + boost::context::execution_context bar_ctx( +#if defined(BOOST_USE_SEGMENTED_STACKS) + boost::context::segmented_stack(), +#else + boost::context::fixedsize_stack(), +#endif + [& main_ctx, count](){ + bar( count); + main_ctx.resume(); + }); + + bar_ctx.resume(); + + std::cout << "main: done" << std::endl; + + return 0; +} |