Time trigger in C

Question

Is it possible to create something like a trigger in C which calls a method, say every five seconds? It would even be better if the timer goes on while the method is being carried out.

You might want to have a look at [this](http://stackoverflow.com/questions/1784136/simple-signals-c-programming-and-alarm-function). — Nobilis, Aug 05 '13 at 11:36

score 2 · Answer 1 · answered Aug 05 '13 at 11:33

2

You can use the alarm() function , but it's not available on all platforms (Windows for example).

answered Aug 05 '13 at 11:33

Unknown

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score 1 · Answer 2 · answered Aug 05 '13 at 11:39

1

How about this:

long thresh = 5*1000; //mlliseconds
//Implement getcurTime()
int prev_time = getcurTime() - thresh;

while(1){

    //Time Elapsed ?
    if (getcurTime() - prev_time >= thresh){
        prev_time = getcurTime();
        Myfunction();
    }
    Sleep(thresh);
}

answered Aug 05 '13 at 11:39

P0W

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what happened to the standard `time()` function? – Jocke Aug 05 '13 at 11:40
@Jocke may be, but need some way to get number of seconds. – P0W Aug 05 '13 at 11:55
2

@POW You have all the seconds you need. `time()` returns the number of seconds passed since 1 January 1970. – Jocke Aug 05 '13 at 12:27
Sleep will wait until tresh time has elapsed. But if `Myfunction` has taken more time than usual, how can I shorten the waiting time? – Explicat Aug 05 '13 at 14:06

Time trigger in C

2 Answers2