Re: [boost] Lock unification (shared vs. upgradable)

From: Howard Hinnant (hinnant_at_[hidden])
Date: 2004-08-08 08:53:49

On Aug 8, 2004, at 6:00 AM, Bronek Kozicki wrote:

>> But when that happens, the generic lock(lock1,lock2) function no 
>> longer works:
>
> I'm little scared about such lock function, where order of lock 
> operations is disconnected from order of unlock operations. However 
> this is something that possibly could be fixed - I'm thinking about 
> building chains of locks.

I can't think of any reason for concern about unlock order.  However 
you're right that it can be fixed.  Just make it an object 
lock_both<Lock1, Lock2>, and record the order that you lock within the 
lock_both so that you can use that information to unlock.

-Howard