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Race conditions - can you actually lose the data in memory?

2015-10-11   Views:0

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I've seen posts where a race condition can actually destroy the contents of a global memory. I understand about not getting the right information if your read just beats your write, but can it actually lose the data altogether? This would mean you ha

I've seen posts where a race condition can actually destroy the contents of a global memory. I understand about not getting the right information if your read just beats your write, but can it actually lose the data altogether? This would mean you have to semaphore every time you write to a global if you have something polling on it to guarantee the data doesn't get lost. I've never seen this in any example programs - its hard to believe!

The replay answer
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I think the idea is merely that when you write to a global (or any)
variable the previous contents are overwritten. If you intended to read the
global before the write but the write ends up happening first then you lose.
"mikema111" wrote in message
news:[email protected]..
> I've seen posts where a race condition can actually destroy the
> contents of a global memory. I understand about not getting the right
> information if your read just beats your write, but can it actually
> lose the data altogether? This would mean you have to semaphore every
> time you write to a global if you have something polling on it to
> guarantee the data doesn't get lost. I've never seen this in any
> example programs - its hard to be
lieve!

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