[boost] Re: Boost.Threads: Do we need all those mutexes?

From: Michael Glassford (glassfordm_at_[hidden])
Date: 2004-06-29 11:36:22

Doug Gregor wrote:
> On Tuesday 29 June 2004 9:15 am, Michael Glassford wrote:
> 
>>>For that purpose we'll need something like
>>>
>>>scoped_lock(mutex&, nolock_t);
>>
>>I'm increasingly liking this syntax, by the way; thanks for suggesting it.
> 
> 
> I don't know the original intention, but my assumption about the "bool" 
> parameter was that it was intended to be used to check (run-time) conditions 
> that might eliminate the need for locking under certain circumstances, e.g.,
> 
> bool foo(bool threadsafe)
> {
>   mutex::scoped_lock l(m, !threadsafe);
> }
> 
> Using types such as nolock_t would prevent such a usage.

I hadn't considered that, but I guess I'll have to now.

Mike