Active Object C++智能指针实现
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 | #include <Windows.h> #include <deque> #include <iostream> #include <boost/shared_ptr.hpp> #include <boost/weak_ptr.hpp> #include <boost/enable_shared_from_this.hpp> using namespace std; using namespace boost; class Command; class ActiveObjectEngine; typedef shared_ptr<Command> CommandPtr; typedef shared_ptr<ActiveObjectEngine> ActiveObjectEnginePtr; typedef weak_ptr<ActiveObjectEngine> ActiveObjectEngineWeakPtr; double secondsPerTick = 0; class Command : public enable_shared_from_this<Command> { public : virtual void Execute()=0; }; class ActiveObjectEngine { deque<CommandPtr> itsCommands; public : void AddCommand(CommandPtr c) { itsCommands.push_back(c); } void Run() { while (itsCommands.size()>0) { CommandPtr c = itsCommands.front(); c->Execute(); itsCommands.pop_front(); } } }; class SleepCommmand : public Command { CommandPtr wakeupCommand; ActiveObjectEngineWeakPtr engine; double sleepTime; bool started; LARGE_INTEGER lv; double start_time; public : SleepCommmand( double milliseconds, ActiveObjectEngineWeakPtr e, CommandPtr wc) : started( false ) { sleepTime = milliseconds; engine = e; wakeupCommand = wc; } virtual void Execute() { QueryPerformanceCounter( &lv ); double current_time = secondsPerTick * lv.QuadPart; if (!started) { started = true ; start_time = current_time; ActiveObjectEnginePtr strong_ptr = engine.lock(); if (strong_ptr) strong_ptr->AddCommand(shared_from_this()); } else { double elasped_time = current_time - start_time; if (elasped_time < sleepTime) { ActiveObjectEnginePtr strong_ptr = engine.lock(); if (strong_ptr) strong_ptr->AddCommand(shared_from_this()); Sleep(1); } else { ActiveObjectEnginePtr strong_ptr = engine.lock(); if (strong_ptr) strong_ptr->AddCommand(CommandPtr(wakeupCommand)); } } } }; class WakeupCommand : public Command { bool excuted; public : WakeupCommand() { excuted = false ; } virtual void Execute() { LARGE_INTEGER lv; QueryPerformanceCounter( &lv ); double current_time = secondsPerTick * lv.QuadPart; excuted = true ; //cout<<"\n*********\nExcuted!\n***********"<<current_time; } }; class DelayedTyper : public Command { public : double itsDelay; char itsChar; static bool stop; static ActiveObjectEnginePtr engine; DelayedTyper( double delay, char c) { itsDelay = delay; itsChar = c; } virtual void Execute() { cout<<itsChar; if (!stop) { DelayAndRepeat(); } } void DelayAndRepeat() { CommandPtr c( new SleepCommmand(itsDelay,engine,shared_from_this())); engine->AddCommand(c); } }; bool DelayedTyper::stop = false ; ActiveObjectEnginePtr DelayedTyper::engine( new ActiveObjectEngine); class StopCommand : public Command { public : virtual void Execute() { DelayedTyper::stop = true ; } }; int _tmain( int argc, _TCHAR* argv[]) { LARGE_INTEGER lv; QueryPerformanceFrequency( &lv ); secondsPerTick = 1.0 / lv.QuadPart; QueryPerformanceCounter( &lv ); double current_time = secondsPerTick * lv.QuadPart; /// One shot /* shared_ptr<WakeupCommand> wakup(new WakeupCommand()); ActiveObjectEnginePtr e (new ActiveObjectEngine()); shared_ptr<SleepCommmand> c(new SleepCommmand(6,e,wakup)); e->AddCommand(c); cout<<"Start...:"<<current_time; e->Run(); */ // Periodic DelayedTyper::engine->AddCommand(CommandPtr( new DelayedTyper(0.01, '1' ))); DelayedTyper::engine->AddCommand(CommandPtr( new DelayedTyper(1, '2' ))); DelayedTyper::engine->AddCommand(CommandPtr( new DelayedTyper(3, '3' ))); CommandPtr sleep_command( new SleepCommmand(6,DelayedTyper::engine,CommandPtr( new StopCommand))); DelayedTyper::engine->AddCommand(sleep_command); DelayedTyper::engine->Run(); return 0; } |
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