add n_slots to storage variables

[charles-cooper]

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cc @ritzdorf @trocher

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[trocher]

Would it make sense to have n_slot for the non-reentrant lock as well for the sake of completeness although it would always be 1?
Otherwise LGTM

[charles-cooper]

Would it make sense to have n_slot for the non-reentrant lock as well for the sake of completeness although it would always be 1? Otherwise LGTM

hm yea, although we didn't really save the number of slots allocated for the reentrancy key anywhere

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2d2a682) 84.99% compared to head (a1e97b1) 68.91%.
Report is 7 commits behind head on master.

❗ Current head a1e97b1 differs from pull request most recent head f435166. Consider uploading reports for the commit f435166 to get more accurate results

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Additional details and impacted files

@@             Coverage Diff             @@
##           master    #3788       +/-   ##
===========================================
- Coverage   84.99%   68.91%   -16.09%     
===========================================
  Files          92       92               
  Lines       13717    13717               
  Branches     3079     3079               
===========================================
- Hits        11659     9453     -2206     
- Misses       1570     3555     +1985     
- Partials      488      709      +221     

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[charles-cooper]

closing in favor of #3789