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How to execute a top priority function?

This is a discussion on How to execute a top priority function? within the C Programming forums, part of the General Programming Boards category; I'm still an amateur. Is it possible to write a program such that it will automatically execute the function in ...

  1. #1
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    How to execute a top priority function?

    I'm still an amateur.
    Is it possible to write a program such that it will automatically execute the function in queue base on their priority even if user programmed it randomly?

    Code:
    function1(){ very_important;  }
    function2(){ important; }
    function3(){ less_important; }
    
    int main() {   // Programmed by user
        function3;
        function1; 
        function2;
    
    //Output: Program will execute function1, 2 and lastly 3. 
    }
    Last edited by zenniz; 03-14-2013 at 01:27 AM.

  2. #2
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    I'm still an armature.
    Electrifying personality, I'm sure!! < ROFL! >

    Yes, using function pointers as part of a struct. One struct member is the priority, and you would sort the structs with that priority member as the key.
    Matticus likes this.

  3. #3
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    Quote Originally Posted by zenniz View Post
    I'm still an amateur.
    Is it possible to write a program such that it will automatically execute the function in queue base on their priority even if user programmed it randomly?
    Not in the way you've described it, no. The whole point of programming is to do it systematically. If a statement calling function3() precedes a statement calling function1() - within the same block - then function3() is called first.

    Adak has mentioned a way to achieve a comparable effect. However, that requires the programmer to deliberately and systematically set up a scheme by which functions are inserted into a queue, and that queue is sorted so the "highest priority" function in that queue is retrieved and executed first. It is not done by programming "randomly".
    Right 98% of the time, and don't care about the other 3%.

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