Tfw your go-to place for CS answers is the Club Penguin wiki

[text] wikia FEoEormnon Games Movies TV Explore Wikia Q Search Glub Penguin Answers Wiki TBED Welcome to Club Penguin Answers Wiki. What would you like to know LTUN Community Wikianswers Y Wiki Activity Videos PR Show how to implement the wait and signal semaphore operations in multiprocessor environments using the TestAndSet O instruction 9351 int guard 0 int semaphore value 0 wait while TestAndSet8guard 1 if semaphore value 0 atomically add process to a queue of processes waiting for the semaphore and set guard to 0 else semaphore value guard 0 signal while TestAndSet8guard 1 if semaphore value 0 there is a process on the wait queue wake up the first process in the queue of waiting processes else semaphore value guard 0 Categories Add category.