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vault backup: 2025-04-02 23:35:03

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Marco Realacci 2025-04-02 23:35:03 +02:00
parent d936a07908
commit 7fe9332a40
2 changed files with 9 additions and 5 deletions
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7
.obsidian/workspace.json vendored
View file

@ -35,8 +35,7 @@
"title": "4 - Semaphores" "title": "4 - Semaphores"
} }
} }
], ]
"currentTab": 1
} }
], ],
"direction": "vertical" "direction": "vertical"
@ -205,10 +204,10 @@
"companion:Toggle completion": false "companion:Toggle completion": false
} }
}, },
"active": "e453bba00fdc57d6", "active": "7c5b0ca6f7687800",
"lastOpenFiles": [ "lastOpenFiles": [
"Concurrent Systems/test/Untitled.md",
"Concurrent Systems/notes/4 - Semaphores.md", "Concurrent Systems/notes/4 - Semaphores.md",
"Concurrent Systems/test/Untitled.md",
"Concurrent Systems/notes/4b - Monitors.md", "Concurrent Systems/notes/4b - Monitors.md",
"Concurrent Systems/notes/4c - Dining Philosophers.md", "Concurrent Systems/notes/4c - Dining Philosophers.md",
"Concurrent Systems/notes/5 - Software Transactional Memory.md", "Concurrent Systems/notes/5 - Software Transactional Memory.md",

7
Concurrent Systems/test/Untitled.md
View file

@ -6,7 +6,9 @@ begin_read() :=
PR_MUTEX.down() PR_MUTEX.down()
R_MUTEX.down() R_MUTEX.down()
R++ # currently active readers R++ # currently active readers
if R = 1 then GLOB_MUTEX.down() if R = 1 then
W_MUTEX.down()
GLOB_MUTEX.down()
R_MUTEX.up() R_MUTEX.up()
PR_MUTEX.up() PR_MUTEX.up()
return return
@ -19,11 +21,14 @@ end_read() :=
return return
begin_write() := begin_write() :=
W_MUTEX.down()
W_MUTEX.up()
PR_MUTEX.down() PR_MUTEX.down()
GLOB_MUTEX.down() GLOB_MUTEX.down()
return return
end_write() := end_write() :=
PR_MUTEX.up()
GLOB_MUTEX.up() GLOB_MUTEX.up()
return return
``` ```