Significance of Sleep(0)

Question

I used to see Sleep(0) in some part of my code where some infinite/long while loops are available. I was informed that it would make the time-slice

Answer 1

Yes, it gives other threads the chance to run.

A value of zero causes the thread to relinquish the remainder of its time slice to any other thread that is ready to run. If there are no other threads ready to run, the function returns immediately, and the thread continues execution.

Source

Answer 2

In one app....the main thread looked for things to do, then launched the "work" via a new thread. In this case, you should call sched_yield() (or sleep(0)) in the main thread, so, that you do not make the "looking" for work, more important then the "work". I prefer sleep(0), but sometimes this is excessive (because you are sleeping a fraction of a second).