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Suppose that a database is to be shared among several concurrent processes. Some of these processes may want only to read the database, whereas others
Suppose that a database is to be shared among several concurrent processes. Some of these processes may want only to read the database, whereas others may want to update that is read and write the database.
Consider the state when the following processes are waiting in the order of their arrival, to get permission to use the shared object. Ri represents reader i and Wi represents writer i
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