Modify the data structures for multiple-mode locks

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Reference no: EM131053750

Modify the data structures for multiple-mode locks and the algorithms for read_lock(X), write_lock(X), and unlock(X) so that upgrading and downgrading of locks are possible. (Hint: The lock needs to check the transaction id(s) that hold the lock, if any.)

Reference no: EM131053750

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