CODEWITHSUNDEEP
operating-systemposix
user228137
user228137

Reputation: 762

is it possible to use only two semaphores to synchronise three or more threads?

We have three threads or more, can we use only two semaphores (binary or counting semaphores)? An idea that popped into my mind is playing with the number of sem_post-s and sem_wait-s. Any ideas, strategies are welcomed.

Upvotes: 0

Views: 388

Answers (1)

mouviciel
mouviciel

Reputation: 67829

A semaphore is used to protect a shared resource. You need as many semaphores as shared resources, this is not linked to how many threads access these resources.

Upvotes: 2

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