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compare_and_swap

concur.atomic.compare_and_swap

(expected T, new_value T)
 => 
T
Perform a bit-wise comparison of the value contained in this atomic and
`expected`. In case both values are equal, replace this value with `new_value`.

returns the old value, independent of whether the old value is bit-wise
equal to `expected` or not.
0.095dev (2026-02-20 12:42:29 GIT hash dbcc3e4b3d2a59f66230b482cff8f0b018178d77 built by fridi@fzen)
last changed: 2026-02-20