Synchronization

Problem: What happens if threads don't interact safely?

• Race conditions

Problem: How can threads be made to interact safely?

• Critical sections
• synchronized keyword
• wait and notify(All) methods

• Incorrect threaded sum of shared variable
• Logic Simulator with wait/notify
• Producer/Consumer

Problem: What happens if safety of thread interaction is not managed well?

• Deadlock
• Sequential execution
• Starvation
• Priority inversion

• Contrived deadlock example
• Dining Philosophers