From: "forthoney (Seong-Heon Jung) via ruby-core" <ruby-core@...>
Date: 2024-02-16T18:26:10+00:00
Subject: [ruby-core:116802] [Ruby master Misc#20272] Ambiguity around Ractor message sending FIFO semantics

Issue #20272 has been reported by forthoney (Seong-Heon Jung).

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Misc #20272: Ambiguity around Ractor message sending FIFO semantics
https://bugs.ruby-lang.org/issues/20272

* Author: forthoney (Seong-Heon Jung)
* Status: Open
* Priority: Normal
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The docs should explicitly state the semantics/properties of Ractor message, especially when it comes to FIFO.
For example, assume I have two Ractors, Ractor A and Ractor B. Ractor A sends two messages `"hello"` and `"world"` in this order to Ractor B.
If I call `Ractor.receive` on Ractor B, am I guaranteed to see `"hello"` and then `"world"` or is it possible the messages are delivered out of order?



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