On Mon, Oct 29, 2007 at 01:08:22 -0700, Andrew Pinski wrote: > On 10/29/07, Tomash Brechko <[EMAIL PROTECTED]> wrote: > > But if *v is simply shared, do all stores to it matter? No, only the > > final value is relevant. > > Actually it depends, it might matter. If you have a loop checking the > value of *v on a different thread and it does not change until this > loop is done, then you end up with a wrong wait. This is the same as > what violatile is for really where it will change out side of the > current thread.
Such program would be incorrect wrt POSIX Threads: you shouldn't read the object that may be modified by another thread. Such "wait" loop is always wrong wrt POSIX Threads. -- Tomash Brechko
