Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Chapter 20, Problem 15E
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Access to shared memory area:
- Access to shared memory is controlled by using semaphores synchronization primitives or locks.
- The semaphore or locks are used for serializing access to the data structures in shared memory.
- When a shared memory is being accessed by a process, a semaphore or lock on it prevents other processes or disk from accessing it.
- A processor counter associated with a semaphore or lock on its prevents other processes or disk from accessing it.
- A processor counter associated with a semaphore keeps track of all processes which want access the shared memory...
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Database System Concepts
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