Sha256: fb55c3ce397179a08750d5f89b0a887226017abf7802e6b6d5fda8db59aea0ce
Contents?: true
Size: 1.16 KB
Versions: 30
Compression:
Stored size: 1.16 KB
Contents
# Poor Man's Fiber (API compatible Thread based Fiber implementation for Ruby 1.8)
# (c) 2008 Aman Gupta (tmm1)
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(*@resume.pop) ] }
@thread.abort_on_exception = true
@thread[:fiber] = self
end
attr_reader :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 yield *args
@yield.push(args)
result = @resume.pop
result.size > 1 ? result : result.first
end
def self.yield *args
raise FiberError, "can't yield from root fiber" unless fiber = Thread.current[:fiber]
fiber.yield(*args)
end
def self.current
Thread.current[:fiber] or raise FiberError, 'not inside a fiber'
end
def inspect
"#<#{self.class}:0x#{self.object_id.to_s(16)}>"
end
end
end
Version data entries
30 entries across 30 versions & 5 rubygems