Assume that a programmer wants mutual exclusion for some part of the code. The following code example illustrates the use of semaphore:   public class Increment { private int testval = 0; Semaphore sem =new Semaphore (3);   public int nextValue(){ sem.acquire(); testval = testval + 1; sem.release(); return testval; } }     Identify the critical section in the Increment class

Computer Networking: A Top-Down Approach (7th Edition)
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Chapter1: Computer Networks And The Internet
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Assume that a programmer wants mutual exclusion for some part of the code. The following code example illustrates the use of semaphore:

 

public class Increment {

private int testval = 0;

Semaphore sem =new Semaphore (3);

 

public int nextValue(){

sem.acquire();

testval = testval + 1;

sem.release();

return testval;

}

}

 

 

  1. Identify the critical section in the Increment class
  2. Will there will be race condition between threads/process in the CRITICAL SECTION?  Explain your answer and correct the code above.

 

 

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