Class: Dispatch::Future

Inherits:
Promise show all
Defined in:
lib/futuristic/dispatch/future.rb

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Dispatch::Promise

Class Method Details

.new(&block) ⇒ Object

Create s new Future

Example:

>> future = Dispatch::Future.new { long_taking_task; 10 }
=> future.value # 10

Arguments

block, last



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# File 'lib/futuristic/dispatch/future.rb', line 13

def self.new(&block)
  # MacRuby and Rubymotion BasicObject#initialize doesn't like blocks, so we have to do this
  # new :: a -> Eval (Future a)
  unless block_given?
    ::Kernel.raise(::ArgumentError, "You cannot initalize a Dispatch::Future without a block")
  end
  self.alloc.initialization(block)
end

Instance Method Details

#description ⇒ Object Also known as: to_s, inspect

Future#description

> <Future: 0x400d382a0 run>



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# File 'lib/futuristic/dispatch/future.rb', line 39

def description
  state = done? ? :dead : :run
  NSString.stringWithString(super.gsub(/>/, " #{state}>"))
end

#done? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/futuristic/dispatch/future.rb', line 47

def done?
  !!@value
end

#initialization(block) ⇒ Object 



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# File 'lib/futuristic/dispatch/future.rb', line 29

def initialization(block)
  super(block)
  __force__
  self
end

#value ⇒ Object 



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# File 'lib/futuristic/dispatch/future.rb', line 52

def value
  __value__
end

#when_done(&call_back) ⇒ Object 



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# File 'lib/futuristic/dispatch/future.rb', line 23

def when_done(&call_back)
  @group.notify(@promise_queue) { call_back.call __value__ }
  self
end