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//
// detail/handler_alloc_helpers.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
#define BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <boost/detail/workaround.hpp>
#include <boost/utility/addressof.hpp>
#include <boost/asio/detail/noncopyable.hpp>
#include <boost/asio/handler_alloc_hook.hpp>
#include <boost/asio/detail/push_options.hpp>
// Calls to asio_handler_allocate and asio_handler_deallocate must be made from
// a namespace that does not contain any overloads of these functions. The
// boost_asio_handler_alloc_helpers namespace is defined here for that purpose.
namespace boost_asio_handler_alloc_helpers {
template <typename Handler>
inline void* allocate(std::size_t s, Handler& h)
{
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) \
|| BOOST_WORKAROUND(__GNUC__, < 3)
return ::operator new(s);
#else
using boost::asio::asio_handler_allocate;
return asio_handler_allocate(s, boost::addressof(h));
#endif
}
template <typename Handler>
inline void deallocate(void* p, std::size_t s, Handler& h)
{
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) \
|| BOOST_WORKAROUND(__GNUC__, < 3)
::operator delete(p);
#else
using boost::asio::asio_handler_deallocate;
asio_handler_deallocate(p, s, boost::addressof(h));
#endif
}
} // namespace boost_asio_handler_alloc_helpers
#define BOOST_ASIO_DEFINE_HANDLER_PTR(op) \
struct ptr \
{ \
Handler* h; \
void* v; \
op* p; \
~ptr() \
{ \
reset(); \
} \
void reset() \
{ \
if (p) \
{ \
p->~op(); \
p = 0; \
} \
if (v) \
{ \
boost_asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h); \
v = 0; \
} \
} \
} \
/**/
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP
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