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vault backup: 2025-03-04 08:34:45

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Marco Realacci 2025-03-04 08:34:45 +01:00
parent 62d5142515
commit 4a23786582
1 changed files with 7 additions and 2 deletions
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7
Concurrent Systems/notes/Lezione2.md
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@ -14,8 +14,13 @@ lock(i) :=
if Y != ⊥ then FAIL if Y != ⊥ then FAIL
else Y <- i else Y <- i
if X = i then return if X = i then return
else fail else FAIL
unlock(i) := unlock(i) :=
Y <- ⊥ Y <- ⊥
return return
```
Problems:
- we don't want the FAIL
- it is possible to have an execution where nobody accesses its CS, if repeated forever it entails a deadlock