StackOverflow2013

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primarykey
Id
6872368
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0
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0
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CreationDate
2011-07-29T11:23:21.957
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2011-07-29T18:50:27.390
LastEditDate
2017-05-23T11:59:41.393
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6849287
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2
Score
2
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0
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text
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I have implemented a callback mechanism based on this article: <a href="http://www.codeproject.com/KB/cpp/CPPCallback.aspx" rel="nofollow noreferrer">http://www.codeproject.com/KB/cpp/CPPCallback.aspx</a> With that implementation you can either use global functions, static member functions or non-static member functions as callbacks. The article describes how to create delegate objects as functors for all of these types. Your <code>class B</code> could have a delegate object as member and a method for registering a callback function and a method for calling it. Neither <code>class B</code> nor your callback functions have to be templated! The delegate objects contain an object pointer in case a non-static member function is used as callback and a pointer to a templated static wrapper function. In this wrapper function the function pointer to your callback function is stored. It is either invoked directly or before bound to the passed object pointer. <pre><code>class B { public: void SetCallback(CDelegate f_Delegate) { m_Delegate = f_Delegate; } static void do_something() { //... m_Delegate(); //... } private: static CDelegate m_Delegate; }; </code></pre> Update: The mechanism is also described here: <a href="https://stackoverflow.com/questions/4298408/5-years-later-is-there-something-better-than-the-fastest-possible-c-delegates">5 years later, is there something better than the "Fastest Possible C++ Delegates"?</a>
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1. POC++ Callback -- How to decouple the call back type
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1. USMirco
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