81 lines
2.0 KiB
C++
81 lines
2.0 KiB
C++
//////////////////////////////
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// Dennis Andersen 2013 //
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//////////////////////////////
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#ifndef MISC_OYSTER_CALLBACK_H
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#define MISC_OYSTER_CALLBACK_H
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#include "PostBox\IPostBox.h"
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namespace Oyster
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{
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namespace Callback
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{
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template <typename ReturnVal = void, typename ParamVal = void>
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struct CallbackFunction
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{
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typedef ReturnVal (*FNC)(ParamVal);
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};
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template <typename ReturnVal = void, typename ParamVal = void>
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struct CallbackObject
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{
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virtual ReturnVal ObjectCallback(ParamVal) = 0;
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};
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enum CallbackType
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{
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CallbackType_PostBox,
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CallbackType_Function,
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CallbackType_Object,
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CallbackType_Unknown,
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};
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template <typename ReturnVal = void, typename ParamVal = void>
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union OysterCallbackValue
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{
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IPostBox<ParamVal>* callbackPostBox;
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CallbackObject<ReturnVal, ParamVal> *callbackObject;
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typename CallbackFunction<ReturnVal, ParamVal>::FNC callbackFunction;
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OysterCallbackValue() { memset(this, 0, sizeof(OysterCallbackValue)); }
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OysterCallbackValue(IPostBox<ReturnVal>* postbox) { callbackPostBox = postbox; }
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OysterCallbackValue(CallbackObject<ReturnVal, ParamVal>* obj) { callbackObject = obj; }
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OysterCallbackValue(typename CallbackFunction<ReturnVal, ParamVal>::FNC function) { callbackFunction = function; }
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};
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template <typename ReturnVal = void, typename ParamVal = void>
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struct OysterCallback
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{
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OysterCallbackValue<ReturnVal, ParamVal> value;
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CallbackType callbackType;
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OysterCallback() :callbackType(CallbackType_Unknown){}
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bool operator()()
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{
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return true;
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}
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bool operator()(ParamVal e)
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{
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switch (callbackType)
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{
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case CallbackType_Function:
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if(value.callbackFunction) value.callbackFunction(e);
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return true;
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break;
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case CallbackType_Object:
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if(value.callbackObject) value.callbackObject->ObjectCallback(e);
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return true;
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break;
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case CallbackType_PostBox:
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value.callbackPostBox->Post(e);
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return true;
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break;
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}
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return false;
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}
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};
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}
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}
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#endif |