DL>
  > The semaphores are designed for threads; I'm not sure if you can use them
  > for inter-process communications or not, just inter-thread communications.
DL>

  You can use named semaphores to communicate between threads of separate
  processes equally as well as you can use them to communicate between
  threads of the same process.

  The same applies to named pipes and message queues.

  > JdeBP <
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