1 # -*- encoding: binary -*-
4 # Spawns a new thread for every client connection we accept(). This
5 # model is recommended for platforms like Ruby 1.8 where spawning new
6 # threads is inexpensive.
8 # This model should provide a high level of compatibility with all
9 # Ruby implementations, and most libraries and applications.
10 # Applications running under this model should be thread-safe
11 # but not necessarily reentrant.
13 # If you're connecting to external services and need to perform DNS
14 # lookups, consider using the "resolv-replace" library which replaces
15 # parts of the core Socket package with concurrent DNS lookup
22 def worker_loop(worker)
23 init_worker_process(worker)
24 threads = ThreadGroup.new
25 limit = worker_connections
28 ret = IO.select(LISTENERS, nil, nil, 1) and
30 if threads.list.size > limit # unlikely
31 # Sleep if we're busy, another less busy worker process may
32 # take it for us if we sleep. This is gross but other options
33 # still suck because they require expensive/complicated
34 # synchronization primitives for _every_ case, not just this
35 # unlikely one. Since this case is (or should be) uncommon,
36 # just busy wait when we have to.
37 sleep(0.1) # hope another process took it
38 break # back to IO.select
42 rescue Errno::EAGAIN, Errno::ECONNABORTED
44 threads.add(Thread.new { process_client(c) })
48 rescue Errno::EBADF, TypeError
53 join_threads(threads.list)