Re: Boost thread question

27 Mar 2003

      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@yahoogroups.com, "William E. Kempf"  
wrote:
...
Michael said:
...
I am having trouble getting the boost thread library to work.  I
...
...
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
...
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
am
passing
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