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+
+// 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