// // detail/handler_tracking.hpp // ~~~~~~~~~~~~~~~~~~~~~~~~~~~ // // Copyright (c) 2003-2015 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_TRACKING_HPP #define BOOST_ASIO_DETAIL_HANDLER_TRACKING_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include #if defined(BOOST_ASIO_ENABLE_HANDLER_TRACKING) # include # include # include # include #endif // defined(BOOST_ASIO_ENABLE_HANDLER_TRACKING) #include namespace boost { namespace asio { namespace detail { #if defined(BOOST_ASIO_ENABLE_HANDLER_TRACKING) class handler_tracking { public: class completion; // Base class for objects containing tracked handlers. class tracked_handler { private: // Only the handler_tracking class will have access to the id. friend class handler_tracking; friend class completion; uint64_t id_; protected: // Constructor initialises with no id. tracked_handler() : id_(0) {} // Prevent deletion through this type. ~tracked_handler() {} }; // Initialise the tracking system. BOOST_ASIO_DECL static void init(); // Record the creation of a tracked handler. BOOST_ASIO_DECL static void creation(tracked_handler* h, const char* object_type, void* object, const char* op_name); class completion { public: // Constructor records that handler is to be invoked with no arguments. BOOST_ASIO_DECL explicit completion(tracked_handler* h); // Destructor records only when an exception is thrown from the handler, or // if the memory is being freed without the handler having been invoked. BOOST_ASIO_DECL ~completion(); // Records that handler is to be invoked with no arguments. BOOST_ASIO_DECL void invocation_begin(); // Records that handler is to be invoked with one arguments. BOOST_ASIO_DECL void invocation_begin(const boost::system::error_code& ec); // Constructor records that handler is to be invoked with two arguments. BOOST_ASIO_DECL void invocation_begin( const boost::system::error_code& ec, std::size_t bytes_transferred); // Constructor records that handler is to be invoked with two arguments. BOOST_ASIO_DECL void invocation_begin( const boost::system::error_code& ec, int signal_number); // Constructor records that handler is to be invoked with two arguments. BOOST_ASIO_DECL void invocation_begin( const boost::system::error_code& ec, const char* arg); // Record that handler invocation has ended. BOOST_ASIO_DECL void invocation_end(); private: friend class handler_tracking; uint64_t id_; bool invoked_; completion* next_; }; // Record an operation that affects pending handlers. BOOST_ASIO_DECL static void operation(const char* object_type, void* object, const char* op_name); // Write a line of output. BOOST_ASIO_DECL static void write_line(const char* format, ...); private: struct tracking_state; BOOST_ASIO_DECL static tracking_state* get_state(); }; # define BOOST_ASIO_INHERIT_TRACKED_HANDLER \ : public boost::asio::detail::handler_tracking::tracked_handler # define BOOST_ASIO_ALSO_INHERIT_TRACKED_HANDLER \ , public boost::asio::detail::handler_tracking::tracked_handler # define BOOST_ASIO_HANDLER_TRACKING_INIT \ boost::asio::detail::handler_tracking::init() # define BOOST_ASIO_HANDLER_CREATION(args) \ boost::asio::detail::handler_tracking::creation args # define BOOST_ASIO_HANDLER_COMPLETION(args) \ boost::asio::detail::handler_tracking::completion tracked_completion args # define BOOST_ASIO_HANDLER_INVOCATION_BEGIN(args) \ tracked_completion.invocation_begin args # define BOOST_ASIO_HANDLER_INVOCATION_END \ tracked_completion.invocation_end() # define BOOST_ASIO_HANDLER_OPERATION(args) \ boost::asio::detail::handler_tracking::operation args #else // defined(BOOST_ASIO_ENABLE_HANDLER_TRACKING) # define BOOST_ASIO_INHERIT_TRACKED_HANDLER # define BOOST_ASIO_ALSO_INHERIT_TRACKED_HANDLER # define BOOST_ASIO_HANDLER_TRACKING_INIT (void)0 # define BOOST_ASIO_HANDLER_CREATION(args) (void)0 # define BOOST_ASIO_HANDLER_COMPLETION(args) (void)0 # define BOOST_ASIO_HANDLER_INVOCATION_BEGIN(args) (void)0 # define BOOST_ASIO_HANDLER_INVOCATION_END (void)0 # define BOOST_ASIO_HANDLER_OPERATION(args) (void)0 #endif // defined(BOOST_ASIO_ENABLE_HANDLER_TRACKING) } // namespace detail } // namespace asio } // namespace boost #include #if defined(BOOST_ASIO_HEADER_ONLY) # include #endif // defined(BOOST_ASIO_HEADER_ONLY) #endif // BOOST_ASIO_DETAIL_HANDLER_TRACKING_HPP