Advanced · Module 12 · Lesson 3 of 5
Acquire-Release: Publishing Work Safely
Publish data with release stores and acquire loads so readers observe complete work, and bound concurrency with a three-permit semaphore.
Pro — members onlyAbout 11 minutes
By the end you can
- Publish shared data with release and acquire ordering
- Explain why relaxed flags can expose incomplete state
- Limit concurrent access with a counting semaphore
01 · A question first
A producer writes a task record then sets a ready flag. A consumer sees the flag, reads the record, and finds half written fields. The flag itself never tore. What ordering promise was missing between the data write and the flag?
Make a guess before you read on.
02 · The idea
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What's inside
- Start with the problem
- How the idea works
- Why it is correct
- What it costs
- Pitfalls and variations
- Where it is used
03 · Practice
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