Class: Concurrent::CyclicBarrier
- Inherits:
-
Synchronization::LockableObject
- Object
- Synchronization::LockableObject
- Concurrent::CyclicBarrier
- Defined in:
- lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb
Overview
A synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point.
Instance Method Summary collapse
-
#broken? ⇒ Boolean
A barrier can be broken when: - a thread called the ‘reset` method while at least one other thread was waiting - at least one thread timed out on `wait` method.
-
#initialize(parties) { ... } ⇒ CyclicBarrier
constructor
Create a new ‘CyclicBarrier` that waits for `parties` threads.
-
#number_waiting ⇒ Fixnum
The number of threads currently waiting on the barrier.
-
#parties ⇒ Fixnum
The number of threads needed to pass the barrier.
-
#reset ⇒ nil
resets the barrier to its initial state If there is at least one waiting thread, it will be woken up, the ‘wait` method will return false and the barrier will be broken If the barrier is broken, this method restores it to the original state.
-
#wait(timeout = nil) ⇒ Boolean
Blocks on the barrier until the number of waiting threads is equal to ‘parties` or until `timeout` is reached or `reset` is called If a block has been passed to the constructor, it will be executed once by the last arrived thread before releasing the others.
Constructor Details
#initialize(parties) { ... } ⇒ CyclicBarrier
Create a new ‘CyclicBarrier` that waits for `parties` threads
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# File 'lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb', line 40 def initialize(parties, &block) Utility::NativeInteger.ensure_integer_and_bounds parties Utility::NativeInteger.ensure_positive_and_no_zero parties super(&nil) synchronize { ns_initialize parties, &block } end |
Instance Method Details
#broken? ⇒ Boolean
A barrier can be broken when:
-
a thread called the ‘reset` method while at least one other thread was waiting
-
at least one thread timed out on ‘wait` method
A broken barrier can be restored using ‘reset` it’s safer to create a new one
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# File 'lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb', line 105 def broken? synchronize { @generation.status != :waiting } end |
#number_waiting ⇒ Fixnum
Returns the number of threads currently waiting on the barrier.
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# File 'lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb', line 54 def number_waiting synchronize { @number_waiting } end |
#parties ⇒ Fixnum
Returns the number of threads needed to pass the barrier.
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# File 'lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb', line 49 def parties synchronize { @parties } end |
#reset ⇒ nil
resets the barrier to its initial state If there is at least one waiting thread, it will be woken up, the ‘wait` method will return false and the barrier will be broken If the barrier is broken, this method restores it to the original state
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# File 'lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb', line 95 def reset synchronize { ns_generation_done @generation, :reset } end |
#wait(timeout = nil) ⇒ Boolean
Blocks on the barrier until the number of waiting threads is equal to ‘parties` or until `timeout` is reached or `reset` is called If a block has been passed to the constructor, it will be executed once by
the last arrived thread before releasing the others
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# File 'lib/rubypitaya/app-template/vendor/bundle/ruby/3.1.0/gems/concurrent-ruby-1.1.10/lib/concurrent-ruby/concurrent/atomic/cyclic_barrier.rb', line 66 def wait(timeout = nil) synchronize do return false unless @generation.status == :waiting @number_waiting += 1 if @number_waiting == @parties @action.call if @action ns_generation_done @generation, :fulfilled true else generation = @generation if ns_wait_until(timeout) { generation.status != :waiting } generation.status == :fulfilled else ns_generation_done generation, :broken, false false end end end end |