Messages in this thread | | | Date | Fri, 14 Jul 2006 10:48:10 +0200 | From | "Jesper Juhl" <> | Subject | Re: SMP share data declaration |
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On 14/07/06, wyb@topsec.com.cn <wyb@topsec.com.cn> wrote: > I know that an integer variable should be declared volatile to share between > CPUs.
NO. volatile won't protect you sufficiently.
Use spinlocks, mutexes, semaphores, barriers and the like to protect variables from concurrent access. Using volatile for this is a BUG and it won't work correctly.
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