Subj : Re: Recursive lock?
To   : comp.programming.threads
From : Peter Koch Larsen
Date : Fri May 20 2005 11:28 am


"Michel" <michel.andre@swipnet.se> skrev i en meddelelse 
news:7N4je.24739$d5.173576@newsb.telia.net...
> David Butenhof wrote:
> > 8-< snipped discussion about recursive locks
>
> Thanks for your as usual insightful reply, maybe its time for a "Recursive 
> locks considered harmful" (to paraphrase Dijkstra) paper/article signed Mr 
> Butenhof ;)
>
> Anyways I have a question for the developers on the recursive locks is 
> evil camp and the win32 platform. Have you made non recursirve wrappers 
> for the recursive CriticalSection and mutex type?
>
> /Michel

I have my "light" mutex class implemented as a critical section:

class lightweight_mutex
{
   bool islocked;
   CRITICAL_SECTION cs;
.....
  void acquire()
  {
      acquire_critical_section(cs);
      assert(!locked);
      locked = true;
  }
};

just pseudo-code... i do not remember the exact code. The check disappears 
in release-mode.

/Peter

.