storage: use Arc<Version> during pin and unpin #685
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Signed-off-by: xuqingchai <xuqingchai00@gmail.com>
skyzh
approved these changes
Aug 27, 2022
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LGTM. Still the other idea mentioned in #549
I've another idea: we can simply using Arc to help us do reference counting, instead of maintaining the ref_cnt by ourselves. For each epoch, we associate a single Version object, and wrap it with an Arc. When a user requests pin, we clone the Arc for them. When the last Arc gets dropped, the Version object gets dropped, and we can safely remove the version.
If you're interested, welcome to implement pin / unpin in this way.
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Signed-off-by: chaixuqing xuqingchai00@gmail.com
close #537
Currently, we use
pinandunpinmanually in code. In this request, we useArc<Version>to help us automatically unpin instead of manual code.