decrease-max-fix #7
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TylerPachal
commented
Apr 27, 2021
| """ | ||
| @spec acquire(term, integer) :: boolean | ||
| def acquire(name, max) do | ||
| case ETS.update_counter(@table, name, [{2, 0}, {2, 1, max, max}], {name, 0}) do | ||
| [^max, _] -> false | ||
| _ -> true | ||
| [old_val, new_val] -> old_val < new_val |
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Annotation: This is the main fix.
As long as the old_val is less than the new_val then we know that we have acquired a lock successfully, whether you are incrementing the max, decrementing the max, or leaving it the same.
stephanos
approved these changes
Apr 27, 2021
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Fixes the behaviour of the
acquire/2function when you provide amaxwhich is less than the current count.See the issue for more details: #6