Improves thread safety of lazy initializations #641
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The Interlocked.Exchange calls will ensure that the same object is returned from each call even under a race. That's not necessarily required, but it should also make sure that no write re-ordering issues occur on platforms that allow it. And it also makes the possibility of thread safety issues explicit.
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Also, I'm not quite sure what is up with the failing test on Windows. That might be a by-product of the change, even though it looks unrelated to the PR functionality. |
Intialize it to null to match pattern for the other references. Fixes the case were the lazy initialization would break when public_key_token was Empty<byte>.Array.
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The failing tests on Windows were my fault - I didn't think that breaks anything and keeps the pattern the same as the other cases. |
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@scott-ferguson-unity thanks for getting this green. This is good to merge on my end. Do you want to add anything before I merge? |
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No, I don't believe anything else needs to be added. |
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Thanks for the PR! |
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@scott-ferguson-unity , there is actually a dedicated |
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@teo-tsirpanis using |
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That one is much better, but I think it would need to be profiled (it uses either reflection or a lambda, depending on the overload you choose). |
The Interlocked.Exchange calls will ensure that the same object is
returned from each call even under a race. That's not necessarily
required, but it should also make sure that no write re-ordering issues
occur on platforms that allow it. And it also makes the possibility
of thread safety issues explicit.