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vault backup: 2025-04-02 23:30:03

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Marco Realacci 2025-04-02 23:30:03 +02:00
parent 6492d433d2
commit d936a07908
2 changed files with 7 additions and 5 deletions
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7
.obsidian/workspace.json vendored
View file

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

5
Concurrent Systems/test/Untitled.md
View file

@ -3,12 +3,12 @@ GLOB_MUTEX and R_MUTEX semaphores init. at 1
R a shared register init. at 0 R a shared register init. at 0
begin_read() := begin_read() :=
PRIO_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 GLOB_MUTEX.down()
R_MUTEX.up() R_MUTEX.up()
PRIO_MUTEX.up() PR_MUTEX.up()
return return
end_read() := end_read() :=
@ -19,6 +19,7 @@ end_read() :=
return return
begin_write() := begin_write() :=
PR_MUTEX.down()
GLOB_MUTEX.down() GLOB_MUTEX.down()
return return