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Marco Realacci 2025-03-17 10:24:23 +01:00
parent 29465e9a2c
commit 9772a79c93
3 changed files with 20 additions and 13 deletions
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24
.obsidian/workspace.json vendored
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@ -13,12 +13,12 @@
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"title": "4c - Dining Philosophers"
"title": "5 - Software Transactional Memory"
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@ -28,19 +28,19 @@
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3
Concurrent Systems/notes/4c - Dining Philosophers.md
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@ -95,4 +95,5 @@ test(i) :=
&& state[i] == hungry) then
state[i] = eating;
self[i].signal();
```
```
N.B.: pickup picks both forks simultaneously

6
Concurrent Systems/notes/5 - Software Transactional Memory.md Normal file
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@ -0,0 +1,6 @@
- Group together parts of the code that must look like atomic, in a way that is transparent, scalable and easy-to-use for the programmer
- Differently from monitors, the part of the code to group is not part of the definition of the objects, but is application dependent
- Differently from transactions in databases, the code can be any code, not just queries on the DB
**Transaction:** an atomic unit of computation (look like instantaneous and without overlap with any other transaction), that can access atomic objects.
when executed alone, every transaction success