Reference no: EM132801701

Question 1. Go to attached file to get the following C source code files:
• pthread_join_example.c
• problem_job.c
• no_mutex.c
• mutex_switch.c

Question 2. Create a homework solution document (.pdf) that contains the answers to the following questions:
a. What does the code in pthread_join_example.c do?
b. Why is sb2.n getting initialized to 50 in pthread_join_example.c?
c. What happens if you comment out line 38 and uncomment (make active) line 45 in pthread_join_example.c . Why?

Question 3. Change the code in pthread_join_example.c so that it creates and uses exactly three threads to do the same job that it was doing originally. Put this new program into a file called pthread_join_example3.c . Show me your new updated code. Compile and run the new code to show that you have done this successfully. Add this proof to your homework solution document.

Question 4. There's a problem with the code in problem_job.c . What is it?

Question 5. Change the code in problem_job.c so that the problem is fixed by using a mutex lock. (Use calls to functions such as pthread_mutex_init, pthread_mutex_lock, pthread_mutex_unlock, pthread_mutex_destroy.). Put your fixed program into a file called mutex_fix.c . Show me your new fixed code. Compile and run the new code to show that you have fixed the problem successfully. Add this proof to your homework solution document.

Question 6. Answer these questions:
a. What is the difference between no_mutex.c and mutex_switch.c?
b. Is there a possibility that no_mutex and mutex_switch might behave differently? If so, why? If not, why not?

Question 7. Change the code in mutex_swith.c so that it is written/configured exactly correctly for the architecture of your computer. Compile and run the new code. Document in any way you choose that your code is properly configured for your computer. Add this proof to your homework solution document.

Attachment:- OS Assignment.rar