the size of a finite buffer be 10 messages and variable N representing the number of messages currently available in the buffer   i) how many semaphores are needed to execute multiple procedures and consumers concurrently and explain why?   ii) if N=5 what will happen to a consumer upon a semawait() call   iii) if N=10 what will happen to a consumer upon a semawait() call   iv) if N=0 will you allow the consumer to access the buffer? What will

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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let the size of a finite buffer be 10 messages and variable N representing the number of messages currently available in the buffer

 

i) how many semaphores are needed to execute multiple procedures and consumers concurrently and explain why?

 

ii) if N=5 what will happen to a consumer upon a semawait() call

 

iii) if N=10 what will happen to a consumer upon a semawait() call

 

iv) if N=0 will you allow the consumer to access the buffer? What will happen if you fail to block the consumer?

 

v) When you should allow any producer to access the buffer and why

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