1 // 2 // detail/handler_tracking.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_TRACKING_HPP 12 #define ASIO_DETAIL_HANDLER_TRACKING_HPP 13 14 15 #include "asio/detail/config.hpp" 16 17 #if defined(ASIO_ENABLE_HANDLER_TRACKING) 18 # include "asio/error_code.hpp" 19 # include "asio/detail/cstdint.hpp" 20 # include "asio/detail/static_mutex.hpp" 21 # include "asio/detail/tss_ptr.hpp" 22 #endif // defined(ASIO_ENABLE_HANDLER_TRACKING) 23 24 #include "asio/detail/push_options.hpp" 25 26 namespace asio { 27 namespace detail { 28 29 #if defined(ASIO_ENABLE_HANDLER_TRACKING) 30 31 class handler_tracking 32 { 33 public: 34 class completion; 35 36 // Base class for objects containing tracked handlers. 37 class tracked_handler 38 { 39 private: 40 // Only the handler_tracking class will have access to the id. 41 friend class handler_tracking; 42 friend class completion; 43 uint64_t id_; 44 45 protected: 46 // Constructor initialises with no id. 47 tracked_handler() : id_(0) {} 48 49 // Prevent deletion through this type. 50 ~tracked_handler() {} 51 }; 52 53 // Initialise the tracking system. 54 ASIO_DECL static void init(); 55 56 // Record the creation of a tracked handler. 57 ASIO_DECL static void creation(tracked_handler* h, 58 const char* object_type, void* object, const char* op_name); 59 60 class completion 61 { 62 public: 63 // Constructor records that handler is to be invoked with no arguments. 64 ASIO_DECL explicit completion(tracked_handler* h); 65 66 // Destructor records only when an exception is thrown from the handler, or 67 // if the memory is being freed without the handler having been invoked. 68 ASIO_DECL ~completion(); 69 70 // Records that handler is to be invoked with no arguments. 71 ASIO_DECL void invocation_begin(); 72 73 // Records that handler is to be invoked with one arguments. 74 ASIO_DECL void invocation_begin(const asio::error_code& ec); 75 76 // Constructor records that handler is to be invoked with two arguments. 77 ASIO_DECL void invocation_begin( 78 const asio::error_code& ec, std::size_t bytes_transferred); 79 80 // Constructor records that handler is to be invoked with two arguments. 81 ASIO_DECL void invocation_begin( 82 const asio::error_code& ec, int signal_number); 83 84 // Constructor records that handler is to be invoked with two arguments. 85 ASIO_DECL void invocation_begin( 86 const asio::error_code& ec, const char* arg); 87 88 // Record that handler invocation has ended. 89 ASIO_DECL void invocation_end(); 90 91 private: 92 friend class handler_tracking; 93 uint64_t id_; 94 bool invoked_; 95 completion* next_; 96 }; 97 98 // Record an operation that affects pending handlers. 99 ASIO_DECL static void operation(const char* object_type, 100 void* object, const char* op_name); 101 102 // Write a line of output. 103 ASIO_DECL static void write_line(const char* format, ...); 104 105 private: 106 struct tracking_state; 107 ASIO_DECL static tracking_state* get_state(); 108 }; 109 110 # define ASIO_INHERIT_TRACKED_HANDLER : public asio::detail::handler_tracking::tracked_handler 111 112 # define ASIO_ALSO_INHERIT_TRACKED_HANDLER , public asio::detail::handler_tracking::tracked_handler 113 114 # define ASIO_HANDLER_TRACKING_INIT asio::detail::handler_tracking::init() 115 116 # define ASIO_HANDLER_CREATION(args) asio::detail::handler_tracking::creation args 117 118 # define ASIO_HANDLER_COMPLETION(args) asio::detail::handler_tracking::completion tracked_completion args 119 120 # define ASIO_HANDLER_INVOCATION_BEGIN(args) tracked_completion.invocation_begin args 121 122 # define ASIO_HANDLER_INVOCATION_END tracked_completion.invocation_end() 123 124 # define ASIO_HANDLER_OPERATION(args) asio::detail::handler_tracking::operation args 125 126 #else // defined(ASIO_ENABLE_HANDLER_TRACKING) 127 128 # define ASIO_INHERIT_TRACKED_HANDLER 129 # define ASIO_ALSO_INHERIT_TRACKED_HANDLER 130 # define ASIO_HANDLER_TRACKING_INIT (void)0 131 # define ASIO_HANDLER_CREATION(args) (void)0 132 # define ASIO_HANDLER_COMPLETION(args) (void)0 133 # define ASIO_HANDLER_INVOCATION_BEGIN(args) (void)0 134 # define ASIO_HANDLER_INVOCATION_END (void)0 135 # define ASIO_HANDLER_OPERATION(args) (void)0 136 137 #endif // defined(ASIO_ENABLE_HANDLER_TRACKING) 138 139 } // namespace detail 140 } // namespace asio 141 142 #include "asio/detail/pop_options.hpp" 143 144 # include "asio/detail/impl/handler_tracking.ipp" 145 146 #endif // ASIO_DETAIL_HANDLER_TRACKING_HPP 147
