Trouble when try to implement a timer thread using C++ on linuxquestion

[steven_yu]

Thanks for your kindly reply.

According to your experience and method, it is not widely to use signal handler to implement, more better way is to use function usleep, sleep 250ms every time and then to update.

So in the opinon of those language designer, it won't be good idea to write so many functions in the signal handler, am I right?

[matsp]

I think that using "signal" handler is a bad idea in this case, since there is a much better alternative. Like you say, usleep() will do a good job.

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Mats

[steven_yu]

I think that using "signal" handler is a bad idea in this case, since there is a much better alternative. Like you say, usleep() will do a good job.

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Mats

Thanks very much for your reply.

At first I have the idea to use SIGALRM since I find signal emit will be real time, but sleep will cause CPU ideal and waste resource, and at the same time sleep or usleep is also impemented by sending alarm signal periodly. When meeting difficulities, then I find signal method on this occasion isn't a good idea.