ShadowPagingRegion: improve concurrency #761
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…mn data contains an exactly sized array
reads will never* block, even with concurrent writes. writes will only block while waiting for the previous group of reads to complete, or while waiting for a previous write to complete. *reads will block if there is a concurrent write doing writeSpecial, however this is completely irrelevant as writeSpecial is never actually used.
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reads will now never* block, even with concurrent writes. writes will only block while waiting for the previous group of reads to complete, or while waiting for a previous write to complete.
i'd like some code review on this one, i've double-checked this more times than i care to count and i haven't encountered any issues in testing, but i'd still like a second opinion before this is merged.
*reads will block if there is a concurrent write doing writeSpecial, however this is completely irrelevant as writeSpecial is never actually used.