Re: [Libevent-users] pending events

[Hampus Wessman <hampus.wessman@xxxxxxxxx>]

On 2010-01-26 18:37, Ron Combs wrote:
> I am running 2 events and I would like to run a 3rd event only when 
> both events finished. how can I achieve this?
You want to do something when both events/tasks are finished, i.e. when 
the last of them finishes. What you need to do is to keep track of what 
happens using some sort of data structure. When one of these events 
finish you simply update the data structure (representing the current 
state) and then check if both tasks are finished by now. If both have 
finished you do whatever you intend to do (e.g. start something new), 
otherwise you just wait until the next event occurs.

To be able to access this data structure from within callback functions 
you can tell libevent to pass a pointer to the data structure as an 
argument when it calls your callback functions. Please be more specific 
if you need help with exactly how to do this.

In summary, you will (AFAIK) need to do this yourself. libevent only 
keeps track of individual events.

Hope that helps!
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