1// 2// detail/handler_alloc_helpers.hpp 3// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 4// 5// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 6// 7// Distributed under the Boost Software License, Version 1.0. (See accompanying 8// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 9// 10 11#ifndef ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP 12#define ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP 13 14 15#include "asio/detail/config.hpp" 16#include "asio/detail/addressof.hpp" 17#include "asio/detail/noncopyable.hpp" 18#include "asio/handler_alloc_hook.hpp" 19 20#include "asio/detail/push_options.hpp" 21 22// Calls to asio_handler_allocate and asio_handler_deallocate must be made from 23// a namespace that does not contain any overloads of these functions. The 24// asio_handler_alloc_helpers namespace is defined here for that purpose. 25namespace asio_handler_alloc_helpers { 26 27template <typename Handler> 28inline void* allocate(std::size_t s, Handler& h) 29{ 30#if !defined(ASIO_HAS_HANDLER_HOOKS) 31 return ::operator new(s); 32#else 33 using asio::asio_handler_allocate; 34 return asio_handler_allocate(s, asio::detail::addressof(h)); 35#endif 36} 37 38template <typename Handler> 39inline void deallocate(void* p, std::size_t s, Handler& h) 40{ 41#if !defined(ASIO_HAS_HANDLER_HOOKS) 42 ::operator delete(p); 43#else 44 using asio::asio_handler_deallocate; 45 asio_handler_deallocate(p, s, asio::detail::addressof(h)); 46#endif 47} 48 49} // namespace asio_handler_alloc_helpers 50 51#define 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) { asio_handler_alloc_helpers::deallocate(v, sizeof(op), *h); v = 0; } } } /**/ 52 53#include "asio/detail/pop_options.hpp" 54 55#endif // ASIO_DETAIL_HANDLER_ALLOC_HELPERS_HPP 56