On Mon, Jan 31, 2011 at 12:16:24PM +0100, arnaud.champion(a)devatom.fr wrote: > ?Hi, > > Something I need to understant about callbacks: > > if I install 2 callback via DomainEventRegisterAny (lifecycle > for the first and graphics for the second for example), am I > right if I said that the AddHandleFunc should be called 2 times ? No, there is no direct relationship between the number of calls to DomainEventRegister* and AddHandleFunc. In the current impl we only call AddHandleFunc once per virConnect object, but again that isn't guarenteed - different libvirt drivers will invoke AddHandleFunc / AddTimeoutFunc a different number of times, as is most suitable for their precise needs. Daniel