implementing V() / signal()

[ChrisA]

Why would this function need to do anything other than increment the
semaphore? I can see why P() needs to decrement then wait -- but is
there a need for V() to context switch on sem <= 0 etc?

TIA

[Ben Pfaff]

ChrisA <thechris...@gmail.com> writes:

Something needs to wake up a thread that is waiting in P(), if
there is one, and doing it as part of V() is the most
straightforward implementation.
--
Ben Pfaff
http://benpfaff.org