How to express correctness properties in ltl

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Express the following correctness properties in LTL. Defne propositions/variables to model the events mentioned in the question.

(a) If a parent process calls the blocking waitpid() system call then it is blocked until the child process terminates.

(b) If a process P calls down() on a binary semaphore and later process Q calls down() on the same semaphore before P calls up() on it, Q gets blocked until P calls up(), if P ever calls up().

(c) In the Singleton design pattern, an instance of the Singleton class is created at most once irregardless of how many times getInstance() method is called.

Reference no: EM1369243

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