yxu1183 / concurrency

Parallel Programming (can handle up to 50 threads simultaneously) to help professor schedule his office hours for two different classes.

Concurrency

Operating System/Assignment-2: Created by Dr. Trevor Bakker

Descirption

Parallel Programming to help professor schedule his office hours for two different classes- class A and B.

Funtionality

• Use of multiple threads and parallel programming to impose several restrictions in office hours.
• No more than 3 students are allowed to simultaneously enter the professor's office.
• If students from class A are in the office, no students from class B are allowed to enter, and the other way around.
• Professor takes break after helping 10 students in a row.
• Professor will answer questions to atmost 5 consecutive students from a single class.
• If there is no student in the office and professor is not taking break, students should not be forced to wait.
• Code should not deadlock.
• Total students arriving to the office is read in from the file with three columns.
• First column is the number specifying whether the student is from class A(1) or B(2).
• Second column is the time between the arrival of a student and the previous student.
• Third column is the number of seconds student spends time with professor asking questions.

Things I learned

• Handling multiple threads in an effective way.
• Correct use and placement of mutex.
• Locking and unlocking the threads as per given conditions.

Compilation Instructions

The application is built in an omega server at UTA. In terminal:

gcc officehours.c -o officehours -lpthread
officehours sample.txt

Acknowledgements

• Suman Thapa Magar - Team Member
• Dr. Trevor Bakker for providing small stub program to get started and his guidance throughout the assignment.