Assuming that the following semaphore operations are performed in a program, determine if the program will...
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Assuming that the following semaphore operations are performed in a program, determine if the program will block. Explain your answer. The initial value of the semaphore is 2. wait (S); signal (S); wait (S); wait (S); wait (S); Solution: Exercise 2 In the following code, three processes print out letters using pute and synchronize using two semaphores L (initialized to 3) and R (initialized to 0). Process 1 while( true) ( wait (L); pute('C'); signal (R) ; Process 2 while( true) ( wait (R); putc ('A'); pute('B'); signal (R); Process 3 while(true) ( wait (R); pute('D'); } (a) Is CABABDDCABCABD a possible output sequence from this set of processes? (b) Is CABACDBCABDD a possible output sequence from this set of processes? Assuming that the following semaphore operations are performed in a program, determine if the program will block. Explain your answer. The initial value of the semaphore is 2. wait (S); signal (S); wait (S); wait (S); wait (S); Solution: Exercise 2 In the following code, three processes print out letters using pute and synchronize using two semaphores L (initialized to 3) and R (initialized to 0). Process 1 while( true) ( wait (L); pute('C'); signal (R) ; Process 2 while( true) ( wait (R); putc ('A'); pute('B'); signal (R); Process 3 while(true) ( wait (R); pute('D'); } (a) Is CABABDDCABCABD a possible output sequence from this set of processes? (b) Is CABACDBCABDD a possible output sequence from this set of processes?
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Related Book For
Operating Systems Internals and Design Principles
ISBN: 978-0133805918
8th edition
Authors: William Stallings
Posted Date:
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