DCrow

#include "ruby.h"
// http://www.angelfire.com/electronic2/issac/rb_cpp_ext_tut.txt
typedef VALUE (ruby_method)(...);

VALUE DeviceDriver = Qnil;

struct conn {
  VALUE settings;
  connection *conn_ptr;
};

DCrow

# Sidekiq process structure
# 1 main thread https://github.com/mperham/sidekiq/blob/master/lib/sidekiq/cli.rb#L104
# 1 heartbeat thread https://github.com/mperham/sidekiq/blob/master/lib/sidekiq/launcher.rb#L23
# 1 scheduled thread https://github.com/mperham/sidekiq/blob/master/lib/sidekiq/scheduled.rb#L63
# options[:concurency] manager threads https://github.com/mperham/sidekiq/blob/master/lib/sidekiq/manager.rb#L44

# If using sidekiq-scheduler gem
# 1 rufus scheduler thread https://github.com/jmettraux/rufus-scheduler/blob/master/lib/rufus/scheduler.rb#L537
# Some arbitrary number up to :max_work_threads https://github.com/jmettraux/rufus-scheduler/blob/master/lib/rufus/scheduler/jobs.rb#L332