Lecture 7 - Condition Variables

Question 1

What are condition variables?

Answer 1

synchronisation mechanism used to wait for a condition to become true without busy waiting

Question 2

What is busy waiting?

Answer 2

looping while holding lock, while could lead to deadlock.

Question 3

What statement do we use to wait for a condition to become true in C++ ? hint : opposite than c

Answer 3

cv.wait(m, { return cond; });

Question 4

What does the _.notify_one() statement means?

Answer 4

When a condition has been met we notify all waiting threads, so they can continue execution.