Re: [boost] [interprocess] Assign to shared_lock from scoped_lock

Subject: Re: [boost] [interprocess] Assign to shared_lock from scoped_lock
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2009-04-08 10:26:46

Chard wrote:
> If I have (template args removed for brevity):
> 
>   shared_lock sh_lock(mutex);
> 
>   scoped_lock sc_lock(move(sh_lock), try_to_lock); // Try for exclusive
>   if (sc_lock)
>   {
>     ...
>     sh_lock = move(sc_lock);  // Drop back to shared *** not available
>   }
> 
> Should that assignment operator be available?

All locks just implement move-assignment from it's own type. Exclusive 
-> sharable is guaranteed to succeed so it might be added. The same 
would happen with scoped->upgradable and upgradable->sharable. I'll add 
it to my to do list.

Best,

Ion