| |
| // Copyright Oliver Kowalke 2009. |
| // 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) |
| |
| #ifndef BOOST_COROUTINES_STANDARD_STACK_ALLOCATOR_H |
| #define BOOST_COROUTINES_STANDARD_STACK_ALLOCATOR_H |
| |
| #if defined(BOOST_USE_VALGRIND) |
| #include <valgrind/valgrind.h> |
| #endif |
| |
| #include <cstddef> |
| #include <cstdlib> |
| #include <new> |
| |
| #include <boost/assert.hpp> |
| #include <boost/config.hpp> |
| |
| #include <boost/coroutine/detail/config.hpp> |
| #include <boost/coroutine/stack_context.hpp> |
| #include <boost/coroutine/stack_traits.hpp> |
| |
| #ifdef BOOST_HAS_ABI_HEADERS |
| # include BOOST_ABI_PREFIX |
| #endif |
| |
| namespace boost { |
| namespace coroutines { |
| |
| template< typename traitsT > |
| struct basic_standard_stack_allocator |
| { |
| typedef traitsT traits_type; |
| |
| void allocate( stack_context & ctx, std::size_t size = traits_type::minimum_size() ) |
| { |
| BOOST_ASSERT( traits_type::minimum_size() <= size); |
| BOOST_ASSERT( traits_type::is_unbounded() || ( traits_type::maximum_size() >= size) ); |
| |
| void * limit = std::malloc( size); |
| if ( ! limit) throw std::bad_alloc(); |
| |
| ctx.size = size; |
| ctx.sp = static_cast< char * >( limit) + ctx.size; |
| #if defined(BOOST_USE_VALGRIND) |
| ctx.valgrind_stack_id = VALGRIND_STACK_REGISTER( ctx.sp, limit); |
| #endif |
| } |
| |
| void deallocate( stack_context & ctx) |
| { |
| BOOST_ASSERT( ctx.sp); |
| BOOST_ASSERT( traits_type::minimum_size() <= ctx.size); |
| BOOST_ASSERT( traits_type::is_unbounded() || ( traits_type::maximum_size() >= ctx.size) ); |
| |
| #if defined(BOOST_USE_VALGRIND) |
| VALGRIND_STACK_DEREGISTER( ctx.valgrind_stack_id); |
| #endif |
| |
| void * limit = static_cast< char * >( ctx.sp) - ctx.size; |
| std::free( limit); |
| } |
| }; |
| |
| typedef basic_standard_stack_allocator< stack_traits > standard_stack_allocator; |
| |
| }} |
| |
| #ifdef BOOST_HAS_ABI_HEADERS |
| # include BOOST_ABI_SUFFIX |
| #endif |
| |
| #endif // BOOST_COROUTINES_STANDARD_STACK_ALLOCATOR_H |