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a) Consider a process that executes the following code: semaphore S1 = 0; semaphore S2 = 0; P(S1); access resource R1 V(S1); P(S2); access resource R2 V(S2); Assume that the system has two different resources of R1 and R2. Briefly explain what happens in the above code. How would you fix the code so that it provides mutually exclusive access to R1 and R2?

a) Consider a process that executes the following code: semaphore S1 = 0; semaphore S2 = 0; P(S1); access resource R1 V(S1); P(S2); access resource R2 V(S2); Assume that the system has two different resources of R1 and R2. Briefly explain what happens in the above code. How would you fix the code so that it provides mutually exclusive access to R1 and R2?

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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a) Consider a process that executes the following code: semaphore S1 = 0; semaphore S2 = 0; P(S1); access resource R1 V(S1); P(S2); access resource R2 V(S2); Assume that the system has two different resources of R1 and R2. Briefly explain what happens in the above code. How would you fix the code so that it provides mutually exclusive access to R1 and R2?
Transcribed Image Text:a) Consider a process that executes the following code: semaphore S1 = 0; semaphore S2 = 0; P(S1); access resource R1 V(S1); P(S2); access resource R2 V(S2); Assume that the system has two different resources of R1 and R2. Briefly explain what happens in the above code. How would you fix the code so that it provides mutually exclusive access to R1 and R2?
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