Purpose of a function

arun10427's Avatar, Join Date: Mar 2010
Light Poster
Hello all,

func(int* a, int b)
{
while((*a&(1 << b))==0);
}

Can someone tell me the hidden purpose of this code?
0
shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
Depending on the values of a and b it will execute.
0
xpi0t0s's Avatar, Join Date: Aug 2004
Mentor
It will either do nothing (if *a & (1<<b) is zero) or hit an infinite loop (if *a & (1<<b) is non-zero).

Best bet is to go after whoever wrote that code and give them a good LARTing, or at least ask them what the point of the function was, because they've almost certainly coded it wrong.

*IF* the function is within a multithreaded program and some other thread is modifying *a, then it might be useful - it would wait until the b-th bit of *a is clear. But this is a terrible way of doing it because it uses 100% CPU until that is done.