Subj : Re: How to manage time-slicing in Pthreads programs?
To   : comp.programming.threads
From : Marcin 'Qrczak' Kowalczyk
Date : Sun Feb 20 2005 09:41 pm

"David Schwartz" <davids@webmaster.com> writes:

>> Which require checking them in regular intervals. Most Unix programs
>> don't have a GUI. I'm glad that they can be promptly interupted
>> without the programmer having to remember to spread checks for an
>> event queue over the program.
>
>     Obviously, you need a way to interrupt a broken program in a very harsh 
> way. But for normal termination, the program has to process the shutdown 
> request politely anyway. Allowing ^C to have its default behavior of 
> terminating the program ungracefully is adequate in only trivial programs.

The model of explicit checking for the request can be implemented in
terms of Unix signals: the signal handler sets a flag and the program
checks the flag from time to time.

The converse is not true.

So the OS should provide Unix signals.

-- 
   __("<         Marcin Kowalczyk
   \__/       qrczak@knm.org.pl
    ^^     http://qrnik.knm.org.pl/~qrczak/

.