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| | # -*- encoding: binary -*-
module Rainbows
# Implements a worker thread pool model. This is suited for platforms
# like Ruby 1.9, where the cost of dynamically spawning a new thread
# for every new client connection is higher than with the ThreadSpawn
# model.
#
# This model should provide a high level of compatibility with all
# Ruby implementations, and most libraries and applications.
# Applications running under this model should be thread-safe
# but not necessarily reentrant.
#
# Applications using this model are required to be thread-safe.
# Threads are never spawned dynamically under this model. If you're
# connecting to external services and need to perform DNS lookups,
# consider using the "resolv-replace" library which replaces parts of
# the core Socket package with concurrent DNS lookup capabilities.
#
# This model probably less suited for many slow clients than the
# others and thus a lower +worker_connections+ setting is recommended.
module ThreadPool
include Base
def worker_loop(worker)
init_worker_process(worker)
pool = (1..worker_connections).map { new_worker_thread }
m = 0
while G.alive && master_pid == Process.ppid
pool.each do |thr|
worker.tmp.chmod(m = 0 == m ? 1 : 0)
# if any worker dies, something is serious wrong, bail
thr.join(timeout) and break
end
end
join_threads(pool, worker)
end
def new_worker_thread
Thread.new {
begin
begin
ret = IO.select(LISTENERS, nil, nil, 1) and
ret.first.each do |sock|
begin
process_client(sock.accept_nonblock)
rescue Errno::EAGAIN, Errno::ECONNABORTED
end
end
rescue Errno::EINTR
rescue Errno::EBADF, TypeError
break
end
rescue Object => e
listen_loop_error(e)
end while G.alive
}
end
end
end
|