Re: Boost thread question

From: Michael (mwitham_at_[hidden])
Date: 2003-03-26 21:30:20

You are right.  I had the code written as you said it should be but I 
accidentally typed in the mutex name instead of the lock name.

Thanks for your help.

- Michael

--- In Boost-Users_at_[hidden], "William E. Kempf" <wekempf_at_c...> 
wrote:
> 
> Michael said:
> > I am having trouble getting the boost thread library to work.  I 
am
> > using Borland C++Builder 6 (on Win2k), and I tried the 1.29.0 
release
> > and the 1.30.0.b1 beta release and both give me the same errors 
in  the
> > condition.hpp file:
> >
> > line 93: " 'operator!' not implemented in type 'recursive_mutex' 
for
> > arguments of the same type"
> >
> > and
> >
> > line 96: " 'recursive_mutex::m_mutex' is not accessible"
> 
> Looking at these lines and making some assumptions, I think you're 
passing
> the wrong type to wait().  You need to pass a Lock, not a Mutex.  
IOW I
> think you have something like this:
> 
> recursive_mutex mx;
> condition cond;
> while (pred)
>    cond.wait(mx);
> 
> when you should instead have this:
> 
> recursive_mutex mx;
> condition cond;
> recursive_mutex::scoped_lock lock(mx);
> while (pred)
>    cond.wait(lock);
> 
> > Plus another 5 errors.  I tried to look at the condition and
> > recursive_mutex class definitions and I do not understand how 
they  are
> > implemented.  Am I using it wrong to get that error?
> 
> I believe so, but you'll have to let me know if I interpreted things
> correctly.
> 
> -- 
> William E. Kempf