Re: A Quick Question about Threads

From: Jason Winnebeck (yg-boost-users_at_[hidden])
Date: 2003-08-01 07:17:15

Mark Sizer wrote:
> static bool ReceiverBody::bShuttingDown()
> {
>      bool bLocalStop = false;
>      { boost::mutex::scoped_lock lockStop( _mutexStop );
>        bLocalStop = _bStop;
>      }
> 
>      return bLocalStop;
> }
> Note that this can't be const, even though it sort-of is. It modifies 
> the mutex, even though that doesn't matter to the logical state of the 
> object.

Mark, a tip on that.  I don't know if this applies to boost mutex or 
not, but if their system is like mine, then you can declare _mutexStop 
with the mutable keyword.  Then you can declare the method bShuttingDown 
as const.  At first it might seem like a bad thing, saying const when 
you really don't mean it, but I believe that for member functions const 
means that the state of the object does not change as a result of the 
function -- and it won't, because the state before and after is the same.

Jason