[ruby-core:102070] [Ruby master Feature#12607] Ruby needs an atomic integer

Issue #12607 has been updated by Dan0042 (Daniel DeLorme).


What is the use case for this atomic integer? I sometimes have a use for an atomic monotonically increasing counter, but that could be satisfied with a very simple API like `n = MyCounter.next`
On the other hand I've never felt the need for decrement or reset or in fact any integer atomic operations other than `+= 1`
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Feature #12607: Ruby needs an atomic integer
https://bugs.ruby-lang.org/issues/12607#change-89931

* Author: shyouhei (Shyouhei Urabe)
* Status: Feedback
* Priority: Normal
* Assignee: ko1 (Koichi Sasada)
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(This one was derived from bug #12463)

Although I don't think += would become atomic, at the same time I understand Rodrigo's needs of _easier_ counter variable that resists inter-thread tampering.  I don't think ruby's Integer class can be used for that purpose for reasons (mainly because it is not designed with threads in mind).  Rather we should introduce a integer class which is carefully designed.

Why not import Concurrent::AtomicFixnum into core?



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