Reentrant Mutex - Example

Example

  1. Thread A calls function F which acquires a reentrant lock for itself before proceeding
  2. Thread B calls function F which attempts to acquire a reentrant lock for itself but cannot due to one already outstanding, resulting in either a block (it waits), or a timeout if requested
  3. Thread A's F calls itself recursively. It already owns the lock, so it will not block itself (deadlock)
  4. Thread B's F is still waiting, or has caught the timeout and worked around it
  5. Thread A's F finishes and releases its lock
  6. Thread B's F can now acquire a reentrant lock and proceed if it was still waiting


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