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ef2bb61018
* Added `Ractor::Port`
* `Ractor::Port#receive` (support multi-threads)
* `Rcator::Port#close`
* `Ractor::Port#closed?`
* Added some methods
* `Ractor#join`
* `Ractor#value`
* `Ractor#monitor`
* `Ractor#unmonitor`
* Removed some methods
* `Ractor#take`
* `Ractor.yield`
* Change the spec
* `Racotr.select`
You can wait for multiple sequences of messages with `Ractor::Port`.
```ruby
ports = 3.times.map{ Ractor::Port.new }
ports.map.with_index do |port, ri|
Ractor.new port,ri do |port, ri|
3.times{|i| port << "r#{ri}-#{i}"}
end
end
p ports.each{|port| pp 3.times.map{port.receive}}
```
In this example, we use 3 ports, and 3 Ractors send messages to them respectively.
We can receive a series of messages from each port.
You can use `Ractor#value` to get the last value of a Ractor's block:
```ruby
result = Ractor.new do
heavy_task()
end.value
```
You can wait for the termination of a Ractor with `Ractor#join` like this:
```ruby
Ractor.new do
some_task()
end.join
```
`#value` and `#join` are similar to `Thread#value` and `Thread#join`.
To implement `#join`, `Ractor#monitor` (and `Ractor#unmonitor`) is introduced.
This commit changes `Ractor.select()` method.
It now only accepts ports or Ractors, and returns when a port receives a message or a Ractor terminates.
We removes `Ractor.yield` and `Ractor#take` because:
* `Ractor::Port` supports most of similar use cases in a simpler manner.
* Removing them significantly simplifies the code.
We also change the internal thread scheduler code (thread_pthread.c):
* During barrier synchronization, we keep the `ractor_sched` lock to avoid deadlocks.
This lock is released by `rb_ractor_sched_barrier_end()`
which is called at the end of operations that require the barrier.
* fix potential deadlock issues by checking interrupts just before setting UBF.
https://bugs.ruby-lang.org/issues/21262
55 lines
1.1 KiB
Ruby
55 lines
1.1 KiB
Ruby
require "test/unit"
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class TestObjSpaceRactor < Test::Unit::TestCase
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def test_tracing_does_not_crash
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assert_ractor(<<~RUBY, require: 'objspace')
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ObjectSpace.trace_object_allocations do
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r = Ractor.new do
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_obj = 'a' * 1024
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end
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r.join
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end
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RUBY
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end
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def test_undefine_finalizer
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assert_ractor(<<~'RUBY', require: 'objspace')
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def fin
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->(id) { }
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end
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ractors = 5.times.map do
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Ractor.new do
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10_000.times do
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o = Object.new
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ObjectSpace.define_finalizer(o, fin)
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ObjectSpace.undefine_finalizer(o)
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end
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end
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end
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ractors.each(&:join)
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RUBY
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end
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def test_copy_finalizer
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assert_ractor(<<~'RUBY', require: 'objspace')
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def fin
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->(id) { }
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end
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OBJ = Object.new
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ObjectSpace.define_finalizer(OBJ, fin)
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OBJ.freeze
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ractors = 5.times.map do
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Ractor.new do
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10_000.times do
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OBJ.clone
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end
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end
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end
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ractors.each(&:join)
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RUBY
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end
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end
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