alarm against infinit loop

[ankitks]

Hi guys,
is there any utility available as a protection against endless_loop()

something like this:

alarm.set(5); //set timeout for 5 sec

endless_loop();

alarm.reset(); //reset it to 0, as alarm not needed any more

Thanks,

[Mike Wahler]

<an*****@yahoo. comwrote in message
news:11******** **************@ j72g2000cwa.goo glegroups.com.. .

Hi guys,
is there any utility available as a protection against endless_loop()

something like this:

alarm.set(5); //set timeout for 5 sec

endless_loop();

alarm.reset(); //reset it to 0, as alarm not needed any more

Thanks,

Perhaps there exists such a utility, but as it
would not be standard C++, it would not be topical
here. However, a simple way to implement this would
involve instrumenting the loop itself. Before
the loop begins, capture a time with std::clock(),
and at one or more points inside the loop, capture
the time again. The difference between it and the
one obtained outside the loop would give elapsed time.
Compare it with your desired 'time-out' value. Break
the loop if elapsed time >= your time-out value.

See standard library documentation for details on
how to use 'std::clock()'.

-Mike

[Binary]

On Dec 2, 7:13 am, anki...@yahoo.c om wrote:

Hi guys,
is there any utility available as a protection against endless_loop()

something like this:

alarm.set(5); //set timeout for 5 sec

endless_loop();

alarm.reset(); //reset it to 0, as alarm not needed any more

pesudo code:

int flag = 0;

main(){
signal(SIGALRM, alarm_handler)
while (1) {
if (flag == 1)
break;
}
}

void alarm_handler()
{
flag = 1;
}

Actually, alarm signal will break the blocked system call.

Thanks,

[Ian Collins]

an*****@yahoo.c om wrote:

Hi guys,
is there any utility available as a protection against endless_loop()

Testing?

Anything else would be either intrusive, or platform specific
(signals/watchdog timers).

--
Ian Collins.