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Possible race condition in SpinLock #2

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mgodave opened this issue Nov 28, 2011 · 0 comments
Open

Possible race condition in SpinLock #2

mgodave opened this issue Nov 28, 2011 · 0 comments

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@mgodave
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mgodave commented Nov 28, 2011

I believe there is a possible race condition in the SpinLock class. The following serialization shows the issue:

count: 0, writer: true

R1 writer.get => true
W1 writer.set(false)
R1 writer.get => false
W2 writer.set(true)
W2 count.get => 0
W2 enters critical section
R1 count.incrementAndGet => 1
R1 enters critical section

It looks like it is possible for a reader and a writer to be in the critical section at the same time.
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@d2fn @mgodave