What are common reasons for deadlocks?

Question

Deadlocks are hard to find and very uncomfortable to remove.

How can I find error sources for deadlocks in my code? Are there any \"deadlock patterns\"?

In m

Answer 1

The classic deadlock scenario is A is holding lock X and wants to acquire lock Y, while B is holding lock Y and wants to acquire lock X. Since neither can complete what they are trying to do both will end up waiting forever (unless timeouts are used).

In this case a deadlock can be avoided if A and B acquire the locks in the same order.