Chris@16: //
Chris@16: // detail/handler_alloc_helpers.hpp
Chris@16: // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Chris@16: //
Chris@101: // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
Chris@16: //
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
Chris@16: #define BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
Chris@16: 
Chris@16: #if defined(_MSC_VER) && (_MSC_VER >= 1200)
Chris@16: # pragma once
Chris@16: #endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
Chris@16: 
Chris@16: #include <boost/asio/detail/config.hpp>
Chris@16: #include <boost/asio/detail/addressof.hpp>
Chris@16: #include <boost/asio/detail/noncopyable.hpp>
Chris@16: #include <boost/asio/handler_alloc_hook.hpp>
Chris@16: 
Chris@16: #include <boost/asio/detail/push_options.hpp>
Chris@16: 
Chris@16: // Calls to asio_handler_allocate and asio_handler_deallocate must be made from
Chris@16: // a namespace that does not contain any overloads of these functions. The
Chris@16: // boost_asio_handler_alloc_helpers namespace is defined here for that purpose.
Chris@16: namespace boost_asio_handler_alloc_helpers {
Chris@16: 
Chris@16: template <typename Handler>
Chris@16: inline void* allocate(std::size_t s, Handler& h)
Chris@16: {
Chris@16: #if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
Chris@16:   return ::operator new(s);
Chris@16: #else
Chris@16:   using boost::asio::asio_handler_allocate;
Chris@16:   return asio_handler_allocate(s, boost::asio::detail::addressof(h));
Chris@16: #endif
Chris@16: }
Chris@16: 
Chris@16: template <typename Handler>
Chris@16: inline void deallocate(void* p, std::size_t s, Handler& h)
Chris@16: {
Chris@16: #if !defined(BOOST_ASIO_HAS_HANDLER_HOOKS)
Chris@16:   ::operator delete(p);
Chris@16: #else
Chris@16:   using boost::asio::asio_handler_deallocate;
Chris@16:   asio_handler_deallocate(p, s, boost::asio::detail::addressof(h));
Chris@16: #endif
Chris@16: }
Chris@16: 
Chris@16: } // namespace boost_asio_handler_alloc_helpers
Chris@16: 
Chris@16: #define BOOST_ASIO_DEFINE_HANDLER_PTR(op) \
Chris@16:   struct ptr \
Chris@16:   { \
Chris@16:     Handler* h; \
Chris@16:     void* v; \
Chris@16:     op* p; \
Chris@16:     ~ptr() \
Chris@16:     { \
Chris@16:       reset(); \
Chris@16:     } \
Chris@16:     void reset() \
Chris@16:     { \
Chris@16:       if (p) \
Chris@16:       { \
Chris@16:         p->~op(); \
Chris@16:         p = 0; \
Chris@16:       } \
Chris@16:       if (v) \
Chris@16:       { \
Chris@16:         boost_asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h); \
Chris@16:         v = 0; \
Chris@16:       } \
Chris@16:     } \
Chris@16:   } \
Chris@16:   /**/
Chris@16: 
Chris@16: #include <boost/asio/detail/pop_options.hpp>
Chris@16: 
Chris@16: #endif // BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP