1 // 2 // detail/task_io_service_operation.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_TASK_IO_SERVICE_OPERATION_HPP 12 #define ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP 13 14 15 #include "asio/error_code.hpp" 16 #include "asio/detail/handler_tracking.hpp" 17 #include "asio/detail/op_queue.hpp" 18 19 #include "asio/detail/push_options.hpp" 20 21 namespace asio { 22 namespace detail { 23 24 class task_io_service; 25 26 // Base class for all operations. A function pointer is used instead of virtual 27 // functions to avoid the associated overhead. 28 class task_io_service_operation ASIO_INHERIT_TRACKED_HANDLER 29 { 30 public: 31 void complete(task_io_service& owner, 32 const asio::error_code& ec, std::size_t bytes_transferred) 33 { 34 func_(&owner, this, ec, bytes_transferred); 35 } 36 37 void destroy() 38 { 39 func_(0, this, asio::error_code(), 0); 40 } 41 42 protected: 43 typedef void (*func_type)(task_io_service*, 44 task_io_service_operation*, 45 const asio::error_code&, std::size_t); 46 47 task_io_service_operation(func_type func) 48 : next_(0), 49 func_(func), 50 task_result_(0) 51 { 52 } 53 54 // Prevents deletion through this type. 55 ~task_io_service_operation() 56 { 57 } 58 59 private: 60 friend class op_queue_access; 61 task_io_service_operation* next_; 62 func_type func_; 63 protected: 64 friend class task_io_service; 65 unsigned int task_result_; // Passed into bytes transferred. 66 }; 67 68 } // namespace detail 69 } // namespace asio 70 71 #include "asio/detail/pop_options.hpp" 72 73 #endif // ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP 74
