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| | # -*- encoding: binary -*-
# :enddoc:
require 'rainbows/fiber/io'
module Rainbows
module Fiber
# blocked readers (key: fileno, value: Rainbows::Fiber::IO object)
RD = []
# blocked writers (key: fileno, value: Rainbows::Fiber::IO object)
WR = []
# sleeping fibers go here (key: Fiber object, value: wakeup time)
ZZ = {}.compare_by_identity
# puts the current Fiber into uninterruptible sleep for at least
# +seconds+. Unlike Kernel#sleep, this it is not possible to sleep
# indefinitely to be woken up (nobody wants that in a web server,
# right?). Calling this directly is deprecated, use
# Rainbows.sleep(seconds) instead.
def self.sleep(seconds)
ZZ[::Fiber.current] = Time.now + seconds
::Fiber.yield
end
# base module used by FiberSpawn and FiberPool
module Base
include Rainbows::Base
# the scheduler method that powers both FiberSpawn and FiberPool
# concurrency models. It times out idle clients and attempts to
# schedules ones that were blocked on I/O. At most it'll sleep
# for one second (returned by the schedule_sleepers method) which
# will cause it.
def schedule(&block)
ret = begin
G.tick
RD.compact.each { |c| c.f.resume } # attempt to time out idle clients
t = schedule_sleepers
Kernel.select(RD.compact.concat(LISTENERS),
WR.compact, nil, t) or return
rescue Errno::EINTR
retry
rescue Errno::EBADF, TypeError
LISTENERS.compact!
raise
end or return
# active writers first, then _all_ readers for keepalive timeout
ret[1].concat(RD.compact).each { |c| c.f.resume }
# accept is an expensive syscall, filter out listeners we don't want
(ret[0] & LISTENERS).each(&block)
end
# wakes up any sleepers that need to be woken and
# returns an interval to IO.select on
def schedule_sleepers
max = nil
now = Time.now
fibs = []
ZZ.delete_if { |fib, time|
if now >= time
fibs << fib
else
max = time
false
end
}
fibs.each { |fib| fib.resume }
now = Time.now
max.nil? || max > (now + 1) ? 1 : max - now
end
def wait_headers_readable(client)
io = client.to_io
expire = nil
begin
return io.recv_nonblock(1, Socket::MSG_PEEK)
rescue Errno::EAGAIN
return if expire && expire < Time.now
expire ||= Time.now + G.kato
client.wait_readable
retry
end
end
def process_client(client)
G.cur += 1
super(client) # see Rainbows::Base
ensure
G.cur -= 1
ZZ.delete(client.f)
end
def self.setup(klass, app)
require 'rainbows/fiber/body'
klass.__send__(:include, Rainbows::Fiber::Body)
self.const_set(:APP, app)
end
end
end
end
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