Sha256: 9e612e98d5101af1e2f1c245105b9027ca874c2dab482f64d318908a91edcf4e
Contents?: true
Size: 1.2 KB
Versions: 42
Compression:
Stored size: 1.2 KB
Contents
unless defined? Fiber
require 'thread'
class FiberError < StandardError; end
class Fiber
def initialize
raise ArgumentError, 'new Fiber requires a block' unless block_given?
@yield = Queue.new
@resume = Queue.new
@thread = Thread.new{ @yield.push [*yield(*wait)] }
@thread.abort_on_exception = true
@thread[:fiber] = self
end
attr_reader :yield, :thread
def resume *args
raise FiberError, 'dead fiber called' unless @thread.alive?
@resume.push(args)
result = @yield.pop
result.size > 1 ? result : result.first
end
def wait
@resume.pop
end
def self.yield *args
raise FiberError, "can't yield from root fiber" unless fiber = Thread.current[:fiber]
fiber.yield.push(args)
result = fiber.wait
result.size > 1 ? result : result.first
end
def inspect
"#<#{self.class}:0x#{self.object_id.to_s(16)}>"
end
end
end
if __FILE__ == $0
f = Fiber.new{ puts 'hi'; p Fiber.yield(1); puts 'bye'; :done }
p f.resume
p f.resume(2)
end
__END__
$ ruby fbr.rb
hi
1
2
bye
:done
$ ruby1.9 fbr.rb
hi
1
2
bye
:done
Version data entries
42 entries across 42 versions & 5 rubygems