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comparison dynamin/core/event.d @ 79:e7595d58f8a3

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Reduce the size of an Event by sharing the mainHandler and dispatcher frame pointers.
author Jordan Miner <jminer7@gmail.com>
date Sat, 06 Feb 2010 15:45:53 -0600
parents 651082a9b364
children 73060bc3f004
comparison
equal deleted inserted replaced
78:651082a9b364 79:e7595d58f8a3
68 public alias void delegate(ArgsType e) Handler; 68 public alias void delegate(ArgsType e) Handler;
69 /// void delegate(ArgsType e) 69 /// void delegate(ArgsType e)
70 public alias void delegate(ArgsType e) Dispatcher; 70 public alias void delegate(ArgsType e) Dispatcher;
71 71
72 Handler[] handlers; 72 Handler[] handlers;
73 /// 73 private void* ptr;
74 private Handler mainHandler; 74 private void function(ArgsType e) mainHandler;
75 /// 75 private void function(ArgsType e) dispatcher;
76 private Dispatcher dispatcher; 76
77 void setUp(Handler mainHandler, Dispatcher dispatcher = null) { 77 void setUp(Handler mainHandler, Dispatcher dispatcher = null) {
78 this.mainHandler = mainHandler; 78 if(mainHandler.ptr != dispatcher.ptr && dispatcher.ptr != null)
79 this.dispatcher = dispatcher; 79 throw new Exception("mainHandler.ptr must equal dispatcher.ptr");
80 } 80 ptr = mainHandler.ptr;
81 this.mainHandler = mainHandler.funcptr;
82 this.dispatcher = dispatcher.funcptr;
83 }
84
81 void defaultDispatch(ArgsType e) { 85 void defaultDispatch(ArgsType e) {
82 callHandlers(e); 86 callHandlers(e);
83 callMainHandler(e); 87 callMainHandler(e);
84 } 88 }
85 89
87 * Calls all the handlers added to this event, passing e to them. 91 * Calls all the handlers added to this event, passing e to them.
88 */ 92 */
89 void opCall(ArgsType e) { 93 void opCall(ArgsType e) {
90 if(e is null) 94 if(e is null)
91 Stdout("Warning: EventArgs null").newline; 95 Stdout("Warning: EventArgs null").newline;
92 if(!dispatcher.funcptr) 96 if(!dispatcher) {
93 defaultDispatch(e); 97 defaultDispatch(e);
94 else 98 return;
95 dispatcher(e); 99 }
100 Dispatcher dg;
101 dg.ptr = ptr;
102 dg.funcptr = dispatcher;
103 dg(e);
96 } 104 }
97 /** 105 /**
98 * Adds the specified handler to this event. The handler will be called 106 * Adds the specified handler to this event. The handler will be called
99 * when the event is fired. 107 * when the event is fired.
100 */ 108 */
135 * Only use this method from a method that does custom dispatching. 143 * Only use this method from a method that does custom dispatching.
136 */ 144 */
137 void callMainHandler(ArgsType e) { 145 void callMainHandler(ArgsType e) {
138 auto stopEventArgs = cast(StopEventArgs)e; 146 auto stopEventArgs = cast(StopEventArgs)e;
139 // if e is an instance of StopEventArgs, then check if it is stopped 147 // if e is an instance of StopEventArgs, then check if it is stopped
140 if(stopEventArgs is null || !stopEventArgs.stopped) 148 if(stopEventArgs is null || !stopEventArgs.stopped) {
141 mainHandler(e); 149 Handler dg;
150 dg.ptr = ptr;
151 dg.funcptr = mainHandler;
152 dg(e);
153 }
142 } 154 }
143 } 155 }
144 156
145 // usage: mixin Event!(whenMoved) moved; 157 // usage: mixin Event!(whenMoved) moved;
146 // mixin Event!(whenMoved, dispatchMoved) moved; 158 // mixin Event!(whenMoved, dispatchMoved) moved;