Re: [Boost-users] [interprocess] Is there a bug in spinlock atomic implementations 1.39 and 1.40?

Subject: Re: [Boost-users] [interprocess] Is there a bug in spinlock atomic implementations 1.39 and 1.40?
From: K. Noel Belcourt (kbelco_at_[hidden])
Date: 2009-10-19 12:03:09

Hi Vladimir,

On Oct 14, 2009, at 7:13 AM, Sakharuk, Vladimir wrote:

> Steven, Thanks!
> If I can not use detail folder is there other ways I can use atomic
> based spinlock?

It's not in Boost, but the Intel Threading Building Blocks has an  
atomic class that you could use to implement an atomic spinlock.   
Perhaps something like this might work?

// atomic's have no constructors but you can reply on their being  
zero initialized
tbb::atomic<int> ai;

...

while(1) {
   if (1 == ai.compare_and_swap(1, 0)) {
     // ...
     --ai;  // atomic decrement
     break;
   }
}

-- Noel