Is it a deadlock or not?

Hi,

I have written a program and I have represented a graph like this:
http://img856.imageshack.us/img856/9233/asdsv.png

According to my studies about operating systems I don't remember a lot about deadlock situations.
So, in this situation is there any deadlocked process or none?
I'm sure to remember that when no cycles occur there is no deadlock but I'm not sure about what could happen because it depends on scheduing, logics etc...

I hope you can help me.
Thanks
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