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Idiom # 33: Atomically read and update variable
Idiom # 33: Atomically read and update variable
See
programming-idioms.org
:
Code
x := concur.atomic 0 for y := x.read, x.read while !x.compare_and_set y (f y)
What are effects?
Running Example
ex33 => # Note that this code does not solve the ABA problem: https://en.wikipedia.org/wiki/ABA_problem f(i) => i+1 x := concur.atomic 0 _ := for y := x.read, x.read while !x.compare_and_set y (f y) say x.read
What are effects?
last changed: 2025-05-13
next: Idiom # 34: Create a Set of objects
