[Telepathy] TelepathyQt threading

[Daniel Pocock]

On 13/10/15 22:51, Gustavo Boiko wrote:
> 
> 
> On Tue, Oct 13, 2015 at 5:39 PM, Daniel Pocock <daniel at pocock.pro
> <mailto:daniel at pocock.pro>> wrote:
> 
> 
> 
>     On 13/10/15 22:34, Gustavo Boiko wrote:
>     > Hi
>     >
>     > On Tue, Oct 13, 2015 at 5:18 PM, Daniel Pocock <daniel at pocock.pro <mailto:daniel at pocock.pro>
>     > <mailto:daniel at pocock.pro <mailto:daniel at pocock.pro>>> wrote:
>     >
>     >
>     >
>     >
>     >     If a connection manager uses some library that creates its own threads
>     >     (it is not a Qt based library either), are there any constraints on how
>     >     these threads interact with the TelepathyQt API?
>     >
>     >     For example, if the connection is completed in another thread, is it
>     >     safe to call setStatus() from that thread?
>     >
>     >
>     > It is probably not safe to call that from a different thread. If
>     > setStatus() was a Qt slot, you could use QMetaObject::invokeMethod()
>     > with Qt::QueuedConnection directly, but that's not the case. So, what
>     > you can do is to define a slot to proxy the request and use
>     > QMetaObject::invokeMethod() to call that slot.
>     >
>     >
> 
> 
>     Thanks for the feedback - could you suggest any example of this in
>     another connection manager or similar code that I can look at?
> 
> 
> I don't recall seeing another CM with that, but it would be something
> like this:
> 
> class MyConnection : public Tp::BaseConnection
> {
> ...
> public Q_SLOTS:
>     void setStatusSlot(uint newStatus, uint reason) {
>         setStatus(newStatus, reason);
>     }
> }
> 
> and then, in the other thread you would call:
> QMetaObject::invokeMethod(myConnectionObject, "setStatusSlot",
> Qt::QueuedConnection, Q_ARG(uint, status), Q_ARG(uint, reason));
> 
> That should be more or less what you need to do in your CM.
> 


Thanks for that example

The library I'm using (reSIProcate) also lets me run the event loop in a
thread that I create myself

Does TelepathyQt provide a mechanism to create threads that can be used
this way and if the threads are created by TelepathyQt, is it safe to
make calls to things like setStatus() directly?