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Critical Section

• Operating Systems A Concept-Based Approach, Dhamdhere p.170

A critical section for a data item, is a section of code that is designed so that it cannot be executed concurrently either with itself or with other critical section for that data item.

This means that if some process is executing a critical section for a data item, another process has to wait until is finished, before it can enter the critical section for the same data item.