1. Operating System Practical Presentation Jonathan Arturo Alvarado Mata 1441616 Carlos Eduardo Triana Sarmiento 1412573 Obed David Guevara Ibarra 1447478 Blog: http://os-ocj.blogspot.com/

2. What we did? We made the program of Bounded buffer producer-consumer. Our program use a thread for producer, and other thread for consumer. What we use? We use 2 kinds of semaphores ... A two-valued or binary semaphore that implements mutual exclusion And the other kind of semaphore is a multiple-valued or counting semaphores that implements synchronized counts of shared resources

3. Practical presentation Where is our code? Our code is in the file nachos/code/threads/threadtest.cc How do we compile our code? We open a terminal and go to /nachos/code Then we type: make This instruction will compile all our code of nachOS How do we execute our code? In the terminal we go to /nachos/code/threads/ Then we type: ./nachos This will execute our code

4. Producer Function semaphore mutex = 1; semaphore empty = N; semaphore full = 0; void producer() { while (1) { P(empty); P(mutex); Product++; V(mutex); V(full); } } void consumer() { while(1) { P(full); P(mutex); V(mutex); V(empty); Product--; } } Consumer Function