Re: Threading - How its done?

FROM : Chris Hanson
DATE : Thu May 08 07:26:13 2008

On May 5, 2008, at 10:12 PM, Michael Vannorsdel wrote:

> Now if two threads are just reading the same piece of data it's ok 
> for them to do so at the same time,


I don't know what gave you this idea, but it's simply not correct in 
the general case.

Whether you're accessing or changing shared data, you need to be using 
proper synchronization primitives.  In special circumstances you can 
use things like atomic operations or barrier primitives, but in 
general if you're going to share data you must synchronize access to it.

  -- Chris