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Bug #6699

rb_barrier_wait() gets blocked when running within a Thread.new { }

Added by Iñaki Baz Castillo almost 4 years ago. Updated almost 4 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
ruby -v:
ruby 2.0.0dev (2012-07-03 trunk 36272) [x86_64-linux]
[ruby-core:46176]

Description

In my Ruby C extension I use rb_barrier_wait(MY_BARRIER) in a method. It works perfectly but I've realized of a case in which it gets
blocked:

Thread.new do
MyExten.my_method
end

In this case the C function rb_barrier_wait(MY_BARRIER) gets blocked (note that I don't call if from other place). So this seems a conflict
of the new Thread and rb_barrier_wait(), it seems that they both try to access to the same shared resource. Is it the expected behavior?

History

#1 [ruby-core:46194] Updated by Motohiro KOSAKI almost 4 years ago

Please don't use rb_barrier_wait(). It doesn't have barrier semantics. Moreover, It is not a public API. We might remove it in future release.

#2 [ruby-core:46227] Updated by Iñaki Baz Castillo almost 4 years ago

Thanks for the clarification.

#3 [ruby-core:46448] Updated by Motohiro KOSAKI almost 4 years ago

  • Status changed from Open to Closed

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