semaphore
セマフォ
Cigarette smokers problem
dining philosophers problem
Readers-writers problem
Sleeping barber problem
Monitor
Spurious wakeup
Semaphore (programming) - Wikipedia
/suto3/google.iconsemaphore
image semaphore
define semaphore
wikipedia semaphore
weblio semaphore
kotobank semaphore
jisho semaphore