Re: [Boost-Users] boost::signal and thread-safety

From: Douglas Gregor (gregod_at_[hidden])
Date: 2003-01-10 17:04:08

On Friday 10 January 2003 08:39 am, "svanechel wrote:
> Hi,
>
> The signal FAQ says that currently boost::signals aren't thread-safe.
> I'm guessing this applies to connecting/disconnecting slots from
> different threads and calling a signal from multiple threadsl, right?

Right.

> If synchronize access when connecting slots and make sure that only a
> single thread calls a certain signal, can I then use boost::signal to
> fire events from objects that do processing in a worker thread?

Yes. So long as you do not connect or disconnect a slot while a signal is 
calling slots, you'll be safe. It's also okay to invoke the same signal 
concurrently, so long as no connections/disconnections are made and the 
combiner can handle it.

> As a secondary question: how far in the future will this thread-
> safety support be added?
>
> Thanks in advance,
>
> Sven

Not very soon. I'm currently deep in development of a documentation system for 
Boost, and I don't have the time to sustain another (major!) effort.

        Doug