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

From: David Abrahams (dave_at_[hidden])
Date: 2004-07-08 10:10:47

"Peter Dimov" <pdimov_at_[hidden]> writes:

> Eric Niebler wrote:
>>
>> How about:
>>
>> if( ScopedLock l = try_lock( m ) )
>> {
>> }
>
> You know that I very much favor declarations in conditions, but this is a
> whole new design, one that uses moveable locks. Something like:
>
> class Mutex
> {
> public:
>
>     AutoLock lock();
>     AutoLock try_lock();
>     AutoLock timed_lock( xtime );
> };
>
> One might argue that a lock is naturally moveable... but I think that we
> should constrain ourselves to (fixing) the current noncopyable scoped_lock
> idiom.

Are there really any repercussions from making a noncopyable type into
a moveable type, other than that you might want to find ways to take
advantage of the new moveability?

-- 
Dave Abrahams
Boost Consulting
http://www.boost-consulting.com