# Copyright © 2009 William Wolf
# <http://www.ironicwolf.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
module Perform
  #
  # keep track of our threads
  @@threads = nil
  
  #
  # give access to the threads
  def self.threads
    @@threads
  end
  
  def perform(a_method, *args)
    if @@threads.nil? then
      #
      # It's the first call initialise @@threads
      @@threads = []
      
      # And so install our exit handler
      # Make the main thread wait, note that it can still be
      # kill with Ctrl+C
      #
      Signal.trap "EXIT" do
        @@threads.each { |t| t.join }
      end
    end
    
    #
    # Create a new Thread
    #
    @@threads << Thread.new(self, a_method, *args) do |obj, met, *a|
      m = obj.method(met)
      m.call(*a)
    end
  end
  
end