Re: Thread safety?

[Matthew Walton <matthew alledora co uk>]

Miles Izzo wrote:
> Hi,
>
> I have been getting some strange segfaults, and at the moment I believe
> it is something to do with a thread I have running which adds items into
> a (derived) TreeStore. Basically, this thread gets a message, which
> tells it to add an item into the store. Sometimes (not always), this
> operation segfaults, usually when I'm trying to access a row.
>
> Is the TreeStore class (and any related class) thread safe? I am using
> pthreads (I'd like to avoid using anything GTK/Glib specific for
> threading since, in the future, I'll probably be unplugging gtkmm).
>
> Thanks.

You shouldn't be accessing gtkmm objects from multiple threads. The 
usual tactic is to use one thread to do all the updates of gtkmm 
objects, fed by other threads which tell it what it needs to do - 
usually using Glib::Dispatcher, which helps with the cross-thread 
communication.

If you access GUI objects from more than one thread you're asking for 
trouble, because GTK+ and gtkmm are not thread-safe.