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| | # -*- encoding: binary -*-
require 'rainbows/fiber'
module Rainbows
# A Fiber-based concurrency model for Ruby 1.9. This uses a pool of
# Fibers to handle client IO to run the application and the root Fiber
# for scheduling and connection acceptance. The pool size is equal to
# the number of +worker_connections+. Compared to the ThreadPool
# model, Fibers are very cheap in terms of memory usage so you can
# have more active connections. This model supports a streaming
# "rack.input" with lightweight concurrency. Applications are
# strongly advised to wrap all slow IO objects (sockets, pipes) using
# the Rainbows::Fiber::IO class whenever possible.
module FiberPool
include Fiber::Base
include Rainbows::Acceptor
def worker_loop(worker) # :nodoc:
init_worker_process(worker)
pool = []
worker_connections.times {
::Fiber.new {
process_client(::Fiber.yield) while pool << ::Fiber.current
}.resume # resume to hit ::Fiber.yield so it waits on a client
}
Fiber::Base.setup(self.class, app)
begin
schedule do |l|
fib = pool.shift or break # let another worker process take it
if io = accept(l)
fib.resume(Fiber::IO.new(io, fib))
else
pool << fib
end
end
rescue => e
Error.listen_loop(e)
end while G.alive || G.cur > 0
end
end
end
|