Concurrency in practice

• Avoid blocking,avoid race conditions
• Use channels to avoid shared state. Use select to manage channels.
• where channels don't work:
  • try to use tools from the sync package first
  • in simple cases or when really needed:try lockless code

Guidelines for non-blocking code

• Don't switch between atomic and non-atomic functions
• Target and exploit situations which enforce uniqueness
• Avoid changing two things at a time
  • Sometimes you can exploit bit operations
  • Sometimes intelligent ordering can do the trick
  • Sometimes it's just not possible at all