thread loops: prevent from 100% cpu usage?

["F. Kater" <f kater2 gmx net>]

Hi,

my cpu uses 100% of the power due to a loop in a thread I use. How can I
prevent from that? (The loop is waiting for a digital-I/O signal from an
external device.) I tried g_thread_yield() but it doesn't seem to have
any effect. In the manual it says:

> This function is often used as a method to make busy wait less evil.
> But in most cases, you will encounter, there are better methods to do
> that. So in general you shouldn't use that function. 

Thank You!
Felix