A release on an atomic object can synchronize with an acquire that reads the released value, establishing happens-before for surrounding accesses. A test-and-set spinlock needs suitable acquisition and release semantics for its guarded data; relaxed flag operations alone do not supply that relationship. This is a separate question from the flag's indivisibility.[ref]

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  1. Happens-before
  2. Memory model
  3. Synchronization (computing)
  4. Thread (computing)
  5. Process (computing)
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