Class: Async::Variable Deprecated

Inherits:
Object
  • Object
show all
Defined in:
lib/async/variable.rb

Overview

Deprecated.

Use Promise instead.

A synchronization primitive that allows one task to wait for another task to resolve a value.

Instance Method Summary collapse

Constructor Details

#initialize(condition = Condition.new) ⇒ Variable

Create a new variable.



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# File 'lib/async/variable.rb', line 17

def initialize(condition = Condition.new)
	warn("`Async::Variable` is deprecated, use `Async::Promise` instead.", category: :deprecated, uplevel: 1) if $VERBOSE
	
	@condition = condition
	@value = nil
end

Instance Method Details

#resolve(value = true) ⇒ Object

Resolve the value.

Signals all waiting tasks.



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# File 'lib/async/variable.rb', line 29

def resolve(value = true)
	@value = value
	condition = @condition
	@condition = nil
	
	self.freeze
	
	condition.signal(value)
end

#resolved? ⇒ Boolean

Whether the value has been resolved.

Returns:

  • (Boolean) 


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# File 'lib/async/variable.rb', line 47

def resolved?
	@condition.nil?
end

#value ⇒ Object

Alias for #wait.



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# File 'lib/async/variable.rb', line 60

def value
	self.wait
end

#value=(value) ⇒ Object

Alias for #resolve.



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# File 'lib/async/variable.rb', line 40

def value=(value)
	self.resolve(value)
end

#wait ⇒ Object

Wait for the value to be resolved.



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# File 'lib/async/variable.rb', line 54

def wait
	@condition&.wait
	return @value
end