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. 25 namespace asio_handler_alloc_helpers { 26 27 template <typename Handler> 28 inline 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 38 template <typename Handler> 39 inline 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
